HANDBOOK
REGULATING VALVES FOR REFRIGERATING SYSTEMS
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
1
INDEX
Capacity Regulators
07
Crankcase Pressure Regulators
14
Evaporating Pressure Regulators
25
Condensing Pressure Regulators
32
Liquid Receiver Pressure Regulators
47
Water Regulating Valves
49
FROM QUALITY OUR NATURAL DEVELOPMENT
Achieved the goal of fifty years working in the industry of Refrigeration and Air Conditioning, Castel Quality Range of Products is well
known and highly appreciated all over the world. Quality is the main issue of our Company and it has a special priority, in every step,
all along the production cycle. UNI EN ISO 9001:2008, issued by ICIM, certifies the Quality System of the Factory. Moreover Castel
Products count a number of certifications in conformity with EEC Directives and with European and American Quality Approval. We
produce on high tech machinery and updated automatic production lines, operating in conformity with the safety and environment
standards currently enforced. Castel offers to the Refrigeration and Air Conditioning Market and to the Manufacturers fully tested
products suitable with HCFC and HFC Refrigerants currently used in the Refrigeration & Air Conditioning Industry.
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
3
4
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
REGULATING VALVES
External leakage
Weights
All the products illustrated in this Handbook are submitted,
one by one, to tightness tests besides to functional tests.
Allowable external leakage, measurable during the test,
agrees to the definition given in Par. 9.4 of EN 12284:
2003 Standard:
“During the test, no bubbles shall form over a period of at
least one minute when the specimen is immersed in water
with low surface tension, …”
The weights of the items listed in this Handbook include
packaging.
Preassure containment
All the products illustrated in this Handbook, if submitted
to hydrostatic test, guarantee a pressure strength at
least equal to 1,43 x PS in compliance with the Directive
97/23/EC.
All the products illustrated in this Handbook, if submitted
to burst test, guarantee a pressure strength at least
equal to 3 x PS according to EN 378-2 : 2008 Standard.
A great number of products illustrated in this Handbook
can guarantee an higher pressure strength, equal to 5 x
PS according the UL Standard 207: 2009
REGULATING VALVES FOR REFRIGERATING SYSTEMS
Guarantee
All Castel products are covered by a 12 – months warranty.
This warranty covers all products or parts thereof that
turn out to be defective within the warranty period. In this
case, at his own expenses, the customer shall return the
defective item with a detailed description of the claimed
defects. The warranty doesn’t apply if the defect of Castel
products are due to mistakes either by customer or by
third parties such wrong installations, use contrary to
Castel indications, tampering. In case of defects of its own
products, Castel will only replace the defective goods and
will not refund damages of any kind.
The technical data shown on this catalogue are indicative.
Castel reserves the right to modify the same at any time
without any previous notice.
The products listed in this handbook are protected
according to the law.
ed. 001-RP-ENG
5
6
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
CAPACITY REGULATORS SERIES 3310
Approved by Underwriters Laboratories Inc.
OPERATION
Capacity regulators series 3310 adjust the flow of hot gas
according to changes of suction pressure, downstream the
regulator. When the evaporating pressure is above the valve
setting, the shutter remain closed. As the suction pressure
drops below the valve setting, the shutter begins to open
and the amount of its opening is proportional to the change
of suction pressure. As the suction pressure continues to
drop, the shutter continues to open farther until the limit of
the stoke is reached and the valve is completely open. On
normal applications there is not sufficient pressure change
available to open these valves to the limit of their stroke;
so the shutter works inside its stroke. Regulators series
3310 regulate only in dependence on the outlet pressure
change, pressure change on the inlet side do not affect
the degree of opening since the valve is equipped with an
equalization bellow with an effective area equal to valve
seat. The factory pressure setting of these valves is 2 bar,
this means that until the suction pressure is above the 2
bar the valve remains closed, when the suction pressure
drops below the 2 bar the valve begin to open. According
to the characteristics of the refrigerating system it can be
necessary to change the valve setting adjusting the setting
screw on the top of the body; the pressure setting range is
from 0,2 bar up to 6 bar.
APPLICATIONS
The capacity regulators series 3310, shown in this chapter,
are classified “Pressure accessories” in the sense of the
Pressure Equipment Directive 94/23/EC, Article 1, Section
2.1.4 and are subject of Article 3, Section 1.3 of the same
Directive.
They are designed to operate on refrigerating systems,
which use the following refrigerant fluids: R22 , R134a ,
R404A , R407C , R507 proper to the Group II (as defined in
Article 9, Section 2.2 of Directive 97/23/EC and referred to
in Directive 67/548/EEC).
On air conditioning systems it is desirable to limit the
minimum evaporating pressure during periods of low load
to prevent coil icing. On refrigerating systems it is desirable
to limit the minimum evaporating pressure during periods
of low load to avoid operating the compressor at a lower
suction pressure than it was designed to operate. Capacity
regulators series 3310 are a practical and economical
solution to these problems while they permit to bypass a
portion of the hot discharge gas directly to the low side
maintaining a desired minimum evaporating pressure
regardless of the decrease in evaporator load.
REGULATING VALVES FOR REFRIGERATING SYSTEMS
CONSTRUCTION
The main parts of capacity regulators series 3310 are
made with the following materials:
• Hot forged brass EN 12420 – CW 617N for body
• Copper tube EN 12735-1 – Cu-DHP for solder
connections
• Austenitic stainless steel AISI 321 for bellow
• Brass bar EN 12164 – CW 614N for shutter
• Brass bar EN 12164 – CW 614N for setting screw
• Spring steel DIN 17223/84 Class C/D for setting spring
• Chloroprene rubber (CR) for outlet seal gaskets
INSTALLATION
Capacity regulators series 3310 are applied in a branch
line off the discharge line. The bypassed vapor can enter
in the low side at one of the following locations:
• to evaporator inlet (with or without distributor)
• to suction line
On this second application to avoid the danger of
overheating the compressor it is required to install a liquid
injection valve ( desuperheating TEV) that supplies enough
liquid refrigerant in the suction line , to cool the bypassed
hot gas.
ed. 001-RP-ENG
7
SELECTION
A correct selection of capacity regulators series 3310 is
possible if complete system information are available. The
selection involves these basic items:
1.Refrigerant
2.Minimum allowable evaporating temperature at
reduced load condition. This data depends on the
system, for air conditioning system this value must be
set to prevent coil icing, in refrigerating system this
value must be set to avoid suction temperature lower
than minimum values recommended by compressors
manufacturers.
3.Minimum required evaporating temperature. The
temperature when the valve begins to open.
4.Compressor capacity at minimum allowable
evaporating temperature. Consult compressor
manufacturer for this value.
5.Minimum evaporator load at which the system is to
be operated. It depends on the type of system; it can
be a percentage of maximum load ( 15-25%) or near
to zero.
6.Liquid temperature when minimum load exist.
The 3310 capacity regulator must be selected to handle
the difference between the compressor capacity (item
4) and the minimum evaporator load (item 5). The
refrigerating capacities indicated on tables 3A, 4A, 5A, 6A
are the regulator capacities, not the system capacities on
which the valves installed, these capacities are based on a
reference liquid temperature of 36,7 °C. The data listed on
these tables are based on:
• used refrigerant (item 1)
• minimum allowable evaporating temperature at reduced
load condition (item 2)
• allowed evaporating temperature (pressure) change
downstream the regulator, this is the temperature
(pressure) change necessary to move the valve shutter
from the “begin to open” position up to “rating capacity”
position ( temperature on item 3 – temperature on item 2)
EXAMPLE
Refrigerant:
R404A
Minimum required evaporating temperature:
-15 [°C]
Minimum allowable evaporating temperature at reduced
load condition:
-19 [°C]
Compressor capacity at minimum allowable evaporating
temperature:
10 [kW]
Minimum evaporator load at which the system is to be
operated:
5 [kW]
Liquid temperature when minimum load exist: 35 [°C]
Solder connections
1.Fix, by means of the table 5B, the correction
factor for liquid temperature TLiquid = 35 °C.
K T liquid = 1,03
2.Calculate the capacity required to the regulator.
Qvalve = (Qcompr - Qevap) x KT liquid = (10 - 5) x 1,03 = 5,15 kW
3.Calculate the evaporating temperature
Tev - Tev min = -15 - (-19) = 4 °C
change.
4.With the following parameters:
• Minimum capacity = 5,15 KW
• Evaporating temperature change = 4 °C
• Minimum allowable evaporating temperature = - 19 °C
Choose the proper valve in table 5A.
The select valves are:
• 3310/M12 with solder connections diameter 12 mm
• 3310/4 with solder connections diameter 1/2”
With liquid temperature different from 36,7 °C the required
capacity of regulator shall be:
(Qcompr - Qevap) x K T liquid = Qvalve
with:
Qcompr = Compressor capacity at minimum allowable
evaporating temperature [kW]
Qevap = Minimum evaporator load at which the
system is to be operated. [kW]
K T liquid = Correction factor for T liquid ≠ 36,7 °C
Qvalve = Refrigerating capacity requested to regulator [kW]
8
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
CONDENSER
CONDENSER
3310
3310
EVAPORATOR
EVAPORATOR
Installation (1)
Installation (2)
The regulator is installed as a bypass between compressor discharge and
suction line.
The regulator opens as evaporation pressure decreases.
The regulator may also be installed as a bypass between compressor
discharge and the expansion valve outlet.
Note: there must be a liquid injection valve for desuperheating suction line
gas.
TABLE 1: General characteristics of capacity regulators 3310
Connections
Catalogue
Number
ODS
SAE
Flare
Ø [in.]
Ø [mm]
1/2”
–
–
3310/M12S
–
–
12
3310/4S
–
1/2”
–
3310/5
5/8”
–
–
3310/5S
–
5/8”
16
3310/7S
–
7/8”
22
3310/4
Kv
Factor
[m3/h]
Regulating
range [bar]
min.
max.
0,2
6
TS [°C]
Factory
setting
[bar]
min.
2
-40
max.
PS
[bar]
Risk Category
according
to PED
+110
28
Art. 3.3
0,70
1,26
1,84
TABLE 2: Dimensions and Weights of regulators 3310
Catalogue
Number
Dimensions [mm]
Weight
[g]
H
H1
H2
L1
L2
3310/4
159
76,5
–
48
–
520
3310/M12S
183
100,5
–
64
–
490
3310/4S
183
100,5
–
64
–
3310/5
163
80,5
–
52
–
3310/5S
183
100,5
–
64
–
480
3310/7S
194
112
–
75,5
–
560
REGULATING VALVES FOR REFRIGERATING SYSTEMS
D
32
490
550
ed. 001-RP-ENG
9
R134a
TABLE 3A: Refrigerant Flow Capacity of capacity regulators 3310 [kW]
Catalogue
Number
Minimum allowable evaporator temperature at reduced load conditions [°C]
Evaporator
temperature
change
[°C] (1)
3310/4
3310/M12S
3310/4S
3310/5
3310/5S
3310/7S
10
4,4
0
-5
-10
-15
-20
-25
-30
-35
1
1,70
1,70
1,67
1,63
1,60
1,57
1,53
1,50
1,46
1,43
2
3,30
3,30
3,23
3,17
3,10
3,04
2,97
2,91
2,84
2,78
3
4,41
4,41
4,32
4,24
4,15
4,06
3,97
3,89
3,80
3,71
4
4,95
4,95
4,85
4,75
4,66
4,56
4,46
4,36
4,27
4,17
5
5,21
5,21
5,10
5,00
4,90
4,79
4,69
4,59
4,49
4,38
6
6,08
6,08
5,96
5,84
5,72
5,60
5,48
5,36
5,24
5,12
1
2,49
2,49
2,44
2,38
2,33
2,27
2,22
2,16
2,11
2,05
2
4,27
4,27
4,17
4,07
3,97
3,87
3,77
3,67
3,56
3,46
3
5,92
5,92
5,80
5,68
5,56
5,43
5,31
5,19
5,07
4,95
4
8,48
8,48
8,31
8,13
7,96
7,79
7,61
7,44
7,27
7,09
5
10,05
10,05
9,84
9,64
9,43
9,23
9,02
8,81
8,61
8,40
6
11,43
11,43
11,19
10,96
10,72
10,49
10,25
10,02
9,79
9,55
1
2,46
2,46
2,42
2,39
2,35
2,31
2,28
2,24
2,20
2,17
2
4,39
4,39
4,32
4,26
4,19
4,13
4,06
4,00
3,93
3,87
3
5,62
5,62
5,54
5,45
5,37
5,29
5,20
5,12
5,03
4,95
4
8,32
8,32
8,20
8,07
7,95
7,82
7,70
7,58
7,45
7,33
5
11,02
11,02
10,86
10,69
10,53
10,36
10,20
10,04
9,87
9,71
6
14,60
14,60
14,38
14,16
13,94
13,73
13,51
13,29
13,08
12,86
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
(1) temperature change required to move the valve shutter from “start to
open” position to rated opening position
TABLE 3B: Correction factor for liquid temperature different from nominal value
Liquid temperature [°C]
10
10
15
20
25
30
35
40
45
50
1,28
1,23
1,18
1,13
1,08
1,03
0,97
0,92
0,86
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R22
TABLE 4A: Refrigerant Flow Capacity of capacity regulators 3310 [kW]
Catalogue
Number
Minimum allowable evaporator temperature at reduced load conditions [°C]
Evaporator
temperature
change
[°C] (1)
3310/4
3310/M12S
3310/4S
3310/5
3310/5S
3310/7S
6
0
-5
-10
-15
-20
-25
-30
-35
-40
1
2,25
2,25
2,21
2,16
2,12
2,07
2,03
1,98
1,94
1,89
2
4,65
4,65
4,56
4,47
4,37
4,28
4,19
4,10
4,01
3,92
3
6,21
6,21
6,09
5,96
5,84
5,72
5,60
5,47
5,35
5,23
4
6,90
6,90
6,76
6,63
6,49
6,35
6,22
6,08
5,95
5,81
5
7,25
7,25
7,10
6,96
6,82
6,67
6,53
6,39
6,24
6,10
6
8,45
8,45
8,29
8,12
7,95
7,78
7,62
7,45
7,28
7,12
1
3,65
3,65
3,57
3,50
3,43
3,36
3,29
3,22
3,15
3,08
2
6,05
6,05
5,94
5,84
5,73
5,62
5,52
5,41
5,30
5,19
3
8,22
8,22
8,05
7,88
7,71
7,55
7,38
7,21
7,04
6,87
4
11,81
11,81
11,57
11,33
11,08
10,84
10,60
10,36
10,12
9,87
5
14,01
14,01
13,72
13,43
13,15
12,86
12,57
12,28
12,00
11,71
6
15,94
15,94
15,61
15,28
14,96
14,63
14,30
13,98
13,65
13,32
1
3,44
3,44
3,38
3,33
3,28
3,23
3,18
3,13
3,08
3,03
2
6,11
6,11
6,01
5,92
5,83
5,74
5,65
5,56
5,47
5,38
3
7,83
7,83
7,71
7,60
7,48
7,36
7,25
7,13
7,01
6,90
4
13,66
13,66
13,46
13,26
13,05
12,85
12,65
12,44
12,24
12,04
5
16,43
16,43
16,19
15,95
15,70
15,46
15,21
14,97
14,72
14,48
6
21,57
21,57
21,24
20,92
20,60
20,28
19,96
19,64
19,32
19,00
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
(1) temperature change required to move the valve shutter from “start to
open” position to rated opening position
TABLE 4B: Correction factor for liquid temperature different from nominal value
Liquid temperature [°C]
10
15
20
25
30
35
40
45
50
1,23
1,19
1,16
1,11
1,06
1,01
0,98
0,94
0,9
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
11
R404A / R507
TABLE 5A: Refrigerant Flow Capacity of capacity regulators 3310 [kW]
Catalogue
Number
Minimum allowable evaporator temperature at reduced load conditions [°C]
Evaporator
temperature
change
[°C] (1)
3310/4
3310/M12S
3310/4S
3310/5
3310/5S
3310/7S
4,4
0
-5
-10
-15
-20
-25
-30
-35
-40
1
2,46
2,38
2,34
2,30
2,26
2,21
2,17
2,13
2,09
2,05
2
4,75
4,59
4,51
4,43
4,35
4,27
4,19
4,11
4,03
3,95
3
6,49
6,27
6,16
6,05
5,94
5,83
5,72
5,61
5,50
5,39
4
7,08
6,84
6,72
6,60
6,48
6,36
6,24
6,12
6,00
5,88
5
7,42
7,17
7,04
6,91
6,79
6,66
6,54
6,41
6,29
6,16
6
8,63
8,34
8,19
8,05
7,90
7,75
7,61
7,46
7,32
7,17
1
3,67
3,52
3,44
3,37
3,29
3,22
3,15
3,07
3,00
2,92
2
6,30
6,04
5,91
5,78
5,65
5,53
5,40
5,27
5,14
5,01
3
8,72
8,36
8,19
8,01
7,83
7,65
7,48
7,30
7,12
6,94
4
12,49
11,98
11,73
11,47
11,22
10,96
10,71
10,45
10,20
9,94
5
14,80
14,19
13,89
13,59
13,29
12,99
12,69
12,38
12,08
11,78
6
16,82
16,13
15,79
15,45
15,10
14,76
14,42
14,08
13,73
13,39
1
3,70
3,49
3,38
3,27
3,16
3,05
2,94
2,83
2,72
2,61
2
6,59
6,21
6,01
5,82
5,62
5,43
5,24
5,04
4,85
4,65
3
8,44
7,94
7,69
7,44
7,19
6,95
6,70
6,45
6,20
5,95
4
14,98
14,10
13,66
13,22
12,77
12,33
11,89
11,45
11,01
10,57
5
18,18
17,11
16,58
16,04
15,51
14,97
14,44
13,90
13,37
12,83
6
24,07
22,66
21,95
21,24
20,53
19,83
19,12
18,41
17,70
16,99
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
(1) temperature change required to move the valve shutter from “start to
open” position to rated opening position
TABLE 5B: Correction factor for liquid temperature different from nominal value
Liquid temperature [°C]
12
10
15
20
25
30
35
40
45
50
1,43
1,35
1,28
1,2
1,12
1,03
0,95
0,86
0,76
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R407C
TABLE 6A: Refrigerant Flow Capacity of capacity regulators 3310 [kW]
Catalogue
Number
Minimum allowable evaporator temperature at reduced load conditions [°C]
Evaporator
temperature
change
[°C] (1)
3310/4
3310/M12S
3310/4S
3310/5
3310/5S
3310/7S
8
4,4
0
-5
-10
-15
-20
-25
-30
-35
1
2,88
2,88
2,81
2,74
2,66
2,59
2,52
2,45
2,38
2,30
2
5,58
5,58
5,44
5,30
5,16
5,02
4,88
4,74
4,60
4,46
3
7,61
7,61
7,42
7,23
7,04
6,85
6,66
6,47
6,28
6,09
4
8,53
8,53
8,31
8,10
7,89
7,67
7,46
7,25
7,04
6,82
5
8,96
8,96
8,74
8,52
8,29
8,07
7,84
7,62
7,40
7,17
6
10,47
10,47
10,21
9,95
9,68
9,42
9,16
8,90
8,64
8,38
1
4,27
4,27
4,16
4,05
3,95
3,84
3,73
3,63
3,52
3,41
2
7,36
7,36
7,18
6,99
6,81
6,62
6,44
6,26
6,07
5,89
3
10,22
10,22
9,97
9,71
9,46
9,20
8,95
8,69
8,43
8,18
4
14,62
14,62
14,25
13,89
13,52
13,15
12,79
12,42
12,06
11,69
5
17,31
17,31
16,87
16,44
16,01
15,57
15,14
14,71
14,28
13,84
6
19,66
19,66
19,17
18,67
18,18
17,69
17,20
16,71
16,22
15,73
1
4,25
4,25
4,14
4,04
3,93
3,82
3,72
3,61
3,50
3,40
2
7,56
7,56
7,37
7,18
6,99
6,80
6,62
6,43
6,24
6,05
3
9,68
9,68
9,44
9,20
8,96
8,72
8,47
8,23
7,99
7,75
4
17,20
17,20
16,77
16,34
15,91
15,48
15,05
14,62
14,19
13,76
5
20,89
20,89
20,37
19,84
19,32
18,80
18,28
17,76
17,23
16,71
6
27,67
27,67
26,98
26,28
25,59
24,90
24,21
23,52
22,83
22,13
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
(1) temperature change required to move the valve shutter from “start to
open” position to rated opening position
TABLE 6B: Correction factor for liquid temperature different from nominal value
Liquid temperature [°C]
10
15
20
25
30
35
40
45
50
1,3
1,25
1,2
1,14
1,09
1,03
0,97
0,9
0,84
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
13
CRANKCASE PRESSURE REGULATORS
SERIES 3320
Approved by Underwriters Laboratories Inc.
As the suction pressure continues to drop, the shutter
continues to open farther until the limit of the stoke is
reached and the valve is completely open. Once the shutter
is fully opened, only an increase in pressure drop across
the valve will increase valve capacity. Regulators series
3320 regulate only in dependence on the outlet pressure
change, pressure change on the inlet side do not affect
the degree of opening since the valve is equipped with an
equalization bellow with an effective area equal to valve
seat. The factory pressure setting of these valves is 2 bar,
this means that until the suction pressure is above the 2
bar the valve remains closed, when the suction pressure
drops below the 2 bar the valve begin to open. According
to the characteristics of the refrigerating system it can be
necessary to change the valve setting adjusting the setting
screw on the top of the body; the pressure setting range is
from 0,2 bar up to 6 bar.
CONSTRUCTION
APPLICATIONS
The crankcase pressure regulators series 3320, shown
in this chapter, are classified “Pressure accessories” in
the sense of the Pressure Equipment Directive 94/23/EC,
Article 1, Section 2.1.4 and are subject of Article 3, Section
1.3 of the same Directive.
They are designed to operate on refrigerating systems,
which use the following refrigerant fluids: R22 , R134a ,
R404A , R407C , R507 proper to the Group II (as defined in
Article 9, Section 2.2 of Directive 97/23/EC and referred to
in Directive 67/548/EEC).
The crankcase pressure regulator is a common accessory
added to many low-temperature refrigeration applications.
It is designed to prevent the compressor’s motor from
overloading when its crankcase pressure rises above its
designed working pressure. On many low-temperature
applications, this can occur during or after a defrost cycle,
or after a long shutdown period.
OPERATION
Crankcase pressure regulators series 3320 adjust the flow
of gaseous refrigerant according to changes of suction
pressure, downstream the regulator. When the suction
pressure is above the valve setting, the shutter remain
closed. As the suction pressure drops below the valve
setting, the shutter begins to open and the amount of its
opening is proportional to the change of suction pressure.
14
ed. 001-RP-ENG
The main parts of crankcase pressure regulators series
3320 are made with the following materials:
• Hot forged brass EN 12420 – CW 617N for body
• Copper tube EN 12735-1 – Cu-DHP for solder
connections
• Austenitic stainless steel AISI 321 for bellow
• Austenitic stainless steel AISI 303 for shutter
• Brass bar EN 12164 – CW 614N for setting screw
• Spring steel DIN 17223/84 Class C/D for setting spring
• Chloroprene rubber (CR) for outlet seal gaskets
INSTALLATION
Crankcase pressure regulators series 3320 are installed
in the suction line between the evaporator and the
compressor. Normally there are no other components
installed downstream, between the valve outlet and the
compressor. This is to ensure that the outlet of regulator
senses the true crankcase pressure of the compressor.
SELECTION
A correct selection of crankcase pressure regulators
series 3320 is possible if complete system information are
available. The selection involves these basic items:
1.Refrigerant
2.Evaporator capacity, at system working conditions.
3.Designed evaporating temperature (saturated
pressure) at design load condition.
4.Maximum allowable suction pressure. Recommended
by the compressor or unit manufacturer; this data is the
valves setting.
REGULATING VALVES FOR REFRIGERATING SYSTEMS
5.Allowable pressure drop across the valves at design
load condition
The pressure drop difference between items 3 and 4
determines how much of the valve stroke is utilized. The
valve setting should be kept as high as possible without
exceeding the recommendation of the compressor
manufacturer. When the full stroke of the valve is used,
the only thing that will increase the valve capacity is to
take more pressure drop across the valve. Since excessive
suction line pressure losses penalize system capacity, the
pressure drop across the 3320 regulator should be kept
to a minimum, the lower the evaporator temperature, the
less pressure drop allowed. The refrigerating capacities
indicated on tables 3A, 4A, 5A, 6A are based on a
reference liquid temperature of 36,7 °C.
With liquid temperature different from 36,7 °C the required
capacity of regulator shall be:
Qevap
K T liquid
= Qvalve
with:
Qevap = Evaporator capacity. [kW]
K T liquid = Correction factor for T liquid ≠ 36,7 °C.
Qvalve = Refrigerating capacity requested to regulator [kW]
CONDENSER
EXAMPLE
Refrigerant:
Evaporator capacity:
Designed evaporating temperature:
Maximum allowable suction pressure
(setting valve):
Allowable pressure drop across the valves:
Liquid temperature:
Solder connections
R404A
4,5 [kW]
-25 [°C]
3,5 [bar]
0,07 [bar]
35 [°C]
1.Fix, by means of the table 5B, the correction
factor for liquid temperature TLiquid = 35 °C.
K T liquid = 1,03
2.Calculate the capacity required to the regulator.
Qevap
4,5
=
= 4,36 kW
Qvalve =
K T liquid
1,03
3.With the following parameters:
• Minimum capacity = 4,36 KW
• Evaporating temperature = - 25 °C
• Maximum allowable suction pressure = 3,5 bar
• Pressure drop across the valves = 0,07 bar
Choose the proper valve in table 5A.
The select valves are:
• 3320/M12 with solder connections diameter 12 mm
• 3320/4 with solder connections diameter 1/2”
Installation
Refrigerating systems for applications with low evaporation temperatures.
The regulator is installed on the suction pipe upstream of the compressor.
The regulator opens when suction pressure drops below the calibrated value.
3320
EVAPORATOR
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
15
TABELLA 1: General characteristics of cranckcase pressure regulators 3320
Connections
Catalogue
Number
ODS
SAE
Flare
Ø [in.]
Ø [mm]
1/2”
–
–
3320/M12S
–
–
12
3320/4S
–
1/2”
–
3320/5
5/8”
–
–
3320/5S
–
5/8”
16
3320/7S
–
7/8”
22
3320/9S
–
1.1/8"
–
3320/M28S
–
–
28
3320/11S
–
1.3/8"
35
3320/4
Kv
Factor
[m3/h]
Regulating
range [bar]
min.
max.
0,2
6
TS [°C]
Factory
setting
[bar]
min.
2
-40
max.
PS
[bar]
Risk Category
according
to PED
+110
28
Art. 3.3
3,30
8
TABLE 2: Dimensions and Weights of regulators 3320
Catalogue
Number
Dimensions [mm]
Weight
[g]
H
H1
H2
L1
L2
3320/4
159
76,5
–
48
–
510
3320/M12S
183
100,5
–
64
–
480
3320/4S
183
100,5
–
64
–
3320/5
163
80,5
–
52
–
3320/5S
183
100,5
–
64
–
480
3320/7S
194
112
–
75,5
–
550
3320/9S
263
151
–
105
–
1470
3320/M28S
263
151
–
105
–
3320/11S
263
151
–
105
–
16
ed. 001-RP-ENG
D
32
46
480
540
1470
1480
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R134a
TABLE 3A: Refrigerant Flow Capacity of cranckcase pressure regulators 3320 [kW]
Catalogue
Number
Pressure
drop across
regulator
[bar]
0,07
3320/4
3320/M12S
3320/4S
0,14
0,21
0,07
3320/5
3320/5S
0,14
0,21
0,07
3320/7S
0,14
0,21
Max allowable
suction
pressure
[bar] (1)
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
Design evaporator temperature [°C]
20
15
10
5
0
-5
-10
-15
-20
-25
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
5,57
6,92
–
–
–
–
7,95
9,88
–
–
–
–
8,07
10,03
–
–
–
6,89
8,56
8,61
–
–
–
9,85
12,23
12,29
–
–
–
9,97
12,38
12,44
–
–
6,96
8,63
9,47
9,49
–
–
9,94
12,33
13,53
13,56
–
–
10,06
12,48
13,69
13,72
–
4,38
6,26
7,77
8,52
8,54
–
6,26
8,94
11,10
12,17
12,20
–
6,34
9,05
11,23
12,32
12,35
–
4,34
5,63
6,99
7,67
7,69
–
6,20
8,05
9,99
10,96
10,98
–
6,27
8,15
10,11
11,09
11,12
–
3,90
5,07
6,45
6,90
6,92
–
5,58
7,24
9,22
9,86
9,89
–
5,65
7,33
9,33
9,98
10,01
8,58
10,65
10,71
–
–
–
12,03
14,95
15,03
–
–
–
12,25
15,22
15,30
–
–
–
12,84
15,95
16,04
–
–
–
18,14
22,54
22,66
–
–
–
18,35
22,79
22,91
8,67
10,76
11,80
11,83
–
–
12,17
15,10
16,56
16,61
–
–
12,39
15,37
16,86
16,90
–
–
12,88
15,98
17,53
17,57
–
–
18,20
22,58
24,77
24,83
–
–
18,40
22,83
25,04
25,11
5,46
7,80
9,68
10,62
10,65
–
8,67
10,95
13,59
14,91
14,95
–
7,80
11,15
13,83
15,17
15,21
–
9,18
11,59
14,38
15,78
15,82
–
14,57
16,38
20,32
22,29
22,35
–
13,11
16,56
20,55
22,54
22,60
5,41
7,02
8,71
9,56
9,58
–
7,59
9,86
12,23
13,42
13,45
–
7,73
10,03
12,45
13,66
13,69
–
8,03
10,43
12,94
14,20
14,24
–
11,35
14,74
18,29
20,06
20,11
–
11,48
14,90
18,49
20,29
20,34
4,87
6,32
8,05
8,60
8,63
–
6,83
8,87
11,29
12,08
12,11
–
6,95
9,03
11,49
12,29
12,32
–
7,23
9,39
11,95
12,78
12,81
–
10,22
13,27
16,88
18,06
18,10
–
10,33
13,41
17,07
18,26
18,30
2,71
3,51
4,56
5,81
6,21
6,23
3,87
5,02
6,52
8,30
8,87
8,90
3,91
5,08
6,60
8,40
8,98
9,00
3,37
4,38
5,69
7,24
7,74
7,76
4,73
6,15
7,99
10,16
10,87
10,90
4,82
6,26
8,13
10,34
11,06
11,09
5,01
6,51
8,45
10,76
11,50
11,53
7,08
9,19
11,94
15,20
16,25
16,29
7,16
9,30
12,07
15,36
16,43
16,47
3,06
3,98
5,17
5,23
5,59
5,60
4,38
5,68
7,38
7,47
7,99
8,01
4,43
5,75
7,47
7,56
8,08
8,10
3,82
4,96
6,44
6,52
6,97
6,99
5,36
6,96
9,04
9,15
9,78
9,81
5,45
7,08
9,20
9,31
9,96
9,98
5,67
7,37
9,57
9,68
10,35
10,38
8,01
10,41
13,52
13,68
14,63
14,66
8,10
10,52
13,66
13,83
14,79
14,83
2,76
3,58
4,65
4,70
5,03
5,04
3,94
5,11
6,64
6,72
7,19
7,21
3,99
5,18
6,72
6,80
7,28
7,29
3,44
4,46
5,80
5,86
6,27
6,29
4,82
6,26
8,13
8,23
8,80
8,83
4,91
6,38
8,28
8,38
8,96
8,98
5,10
6,63
8,61
8,71
9,32
9,34
7,21
9,37
12,16
12,31
13,16
13,20
7,29
9,47
12,30
12,45
13,31
13,34
6,56
8,15
–
–
–
–
9,15
11,37
–
–
–
–
9,37
11,64
–
–
–
–
10,04
12,47
–
–
–
–
14,30
17,77
–
–
–
–
14,34
17,81
Be continued
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
17
R134a
TABLE 3A: Refrigerant Flow Capacity of cranckcase pressure regulators 3320 [kW]
Catalogue
Number
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,07
3320/9S
3320/M28S
0,14
0,21
0,07
3320/11S
Design evaporator temperature [°C]
Max allowable
suction
pressure
[bar] (1)
Pressure
drop across
regulator
[bar]
0,14
0,21
20
15
10
5
0
-5
-10
-15
-20
-25
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
15,58
19,36
–
–
–
–
21,74
27,01
–
–
–
–
22,26
27,65
–
–
–
–
23,84
29,62
–
–
–
–
33,98
42,22
–
–
–
–
34,06
42,31
–
–
–
20,38
25,31
25,44
–
–
–
28,59
35,52
35,70
–
–
–
29,11
36,16
36,35
–
–
–
30,51
37,90
38,10
–
–
–
43,11
53,55
53,83
–
–
–
43,59
54,14
54,43
–
–
20,60
25,56
28,04
28,11
–
–
28,91
35,87
39,35
39,45
–
–
29,43
36,52
40,06
40,16
–
–
30,60
37,97
41,65
41,75
–
–
43,24
53,64
58,85
59,00
–
–
43,72
54,24
59,50
59,65
–
12,98
18,54
23,00
25,24
25,30
–
20,60
26,02
32,29
35,42
35,51
–
18,54
26,49
32,86
36,05
36,14
–
21,80
27,54
34,17
37,48
37,58
–
34,61
38,91
48,28
52,96
53,10
–
31,15
39,34
48,81
53,55
53,68
–
12,85
16,69
20,70
22,71
22,77
–
18,03
23,42
29,06
31,88
31,96
–
18,36
23,84
29,58
32,45
32,53
–
19,09
24,79
30,75
33,74
33,82
–
26,97
35,02
43,45
47,67
47,79
–
27,27
35,41
43,93
48,19
48,32
–
11,56
15,02
19,11
20,44
20,49
–
16,23
21,08
26,83
28,69
28,76
–
16,52
21,46
27,31
29,20
29,27
–
17,18
22,31
28,39
30,36
30,44
–
24,27
31,52
40,11
42,90
43,01
–
24,54
31,87
40,56
43,38
43,48
8,01
10,41
13,52
17,20
18,40
18,44
11,25
14,61
18,97
24,14
25,82
25,88
11,45
14,87
19,31
24,57
26,28
26,35
11,90
15,46
20,08
25,55
27,33
27,39
16,82
21,84
28,37
36,10
38,61
38,71
17,01
22,09
28,68
36,50
39,04
39,14
9,07
11,78
15,30
15,48
16,56
16,60
12,73
16,53
21,47
21,73
23,24
23,30
12,96
16,83
21,86
22,12
23,65
23,71
13,47
17,50
22,72
23,00
24,59
24,66
19,04
24,72
32,11
32,49
34,75
34,84
19,25
25,00
32,46
32,85
35,13
35,22
8,16
10,60
13,77
13,93
14,90
14,94
11,46
14,88
19,32
19,56
20,91
20,97
11,66
15,15
19,67
19,91
21,29
21,34
12,13
15,75
20,45
20,70
22,13
22,19
17,13
22,25
28,90
29,24
31,27
31,35
17,32
22,50
29,22
29,57
31,62
31,70
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
(1) This value is the valve pressure setting
TABLE 3B: Correction factor for liquid temperature different from nominal value
Liquid temperature [°C]
18
10
15
20
25
30
35
40
45
50
1,28
1,23
1,18
1,13
1,08
1,03
0,97
0,92
0,86
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R22
TABELLA 4A: Rese frigorifere dei regolatori della pressione di avviamento 3320 [kW]
Catalogue
Number
Pressure
drop across
regulator
[bar]
0,07
3320/4
3320/M12S
3320/4S
0,14
0,21
0,07
3320/5
3320/5S
0,14
0,21
0,07
3320/7S
0,14
0,21
Max allowable
suction
pressure
[bar] (1)
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
Design evaporator temperature [°C]
4,4
0
-5
-10
-15
-20
-25
-30
-35
-40
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
5,15
6,38
6,44
–
–
–
7,35
9,11
9,20
–
–
–
7,24
8,97
9,06
–
–
–
6,16
7,63
7,71
–
–
–
8,63
10,69
10,80
–
–
–
8,80
10,90
11,01
–
–
–
8,71
10,79
10,90
–
–
–
12,17
15,08
15,23
–
–
–
12,44
15,42
15,57
–
–
5,19
6,44
7,99
8,04
–
–
7,42
9,20
11,42
11,48
–
–
7,37
9,14
11,35
11,41
–
–
6,44
7,99
9,91
9,96
–
–
9,06
11,24
13,95
14,02
–
–
9,20
11,41
14,16
14,23
–
–
9,70
12,02
14,92
15,00
–
–
13,63
16,90
20,98
21,09
–
–
13,85
17,18
21,32
21,43
–
–
6,55
8,13
8,91
8,93
–
–
9,36
11,61
12,73
12,75
–
–
9,44
11,71
12,84
12,86
–
–
8,12
10,07
11,04
11,06
–
–
11,42
14,17
15,54
15,56
–
–
11,60
14,39
15,78
15,80
–
–
12,15
15,07
16,52
16,55
–
–
17,08
21,19
23,23
23,27
–
–
17,36
21,53
23,61
23,64
–
–
5,90
7,31
8,02
8,03
–
–
8,42
10,45
11,46
11,48
–
–
8,50
10,54
11,56
11,57
–
–
7,31
9,07
9,94
9,96
–
–
10,28
12,75
13,98
14,01
–
–
10,44
12,95
14,20
14,22
–
–
10,94
13,56
14,87
14,90
–
–
15,38
19,07
20,91
20,94
–
–
15,62
19,38
21,25
21,28
–
4,09
5,31
6,58
7,22
7,23
–
5,84
7,58
9,40
10,31
10,33
–
5,89
7,65
9,49
10,40
10,42
–
5,06
6,58
8,16
8,95
8,96
–
7,13
9,25
11,48
12,58
12,60
–
7,24
9,40
11,66
12,78
12,80
–
7,58
9,84
12,21
13,39
13,41
–
10,65
13,84
17,16
18,82
18,85
–
10,83
14,06
17,44
19,12
19,15
–
3,68
4,78
6,45
6,50
6,51
–
5,25
6,82
9,22
9,28
9,29
–
5,30
6,88
9,30
9,36
9,37
–
4,56
5,92
8,00
8,05
8,06
–
6,41
8,33
11,25
11,33
11,34
–
6,51
8,46
11,43
11,50
11,52
–
6,82
8,86
11,97
12,05
12,07
–
9,59
12,45
16,83
16,94
16,96
–
9,74
12,65
17,10
17,21
17,24
–
3,31
4,30
5,81
5,85
5,86
–
4,73
6,14
8,30
8,35
8,37
–
4,77
6,19
8,37
8,42
8,44
–
4,10
5,33
7,20
7,25
7,26
–
5,77
7,50
10,13
10,19
10,21
–
5,86
7,61
10,28
10,35
10,37
–
6,14
7,97
10,77
10,84
10,86
–
8,63
11,21
15,15
15,24
15,27
–
8,77
11,39
15,39
15,49
15,51
3,06
3,98
5,17
5,23
5,26
5,27
4,38
5,68
7,38
7,47
7,52
7,53
4,41
5,73
7,44
7,53
7,58
7,59
3,80
4,93
6,40
6,48
6,52
6,53
5,34
6,94
9,01
9,11
9,17
9,19
5,42
7,04
9,15
9,26
9,32
9,33
5,68
7,38
9,58
9,69
9,76
9,77
7,99
10,37
13,47
13,63
13,72
13,74
8,11
10,54
13,69
13,85
13,94
13,96
2,76
3,58
4,65
4,70
4,74
4,74
3,94
5,11
6,64
6,72
6,77
6,78
3,97
5,16
6,70
6,78
6,82
6,83
3,42
4,44
5,76
5,83
5,87
5,88
4,81
6,24
8,11
8,20
8,26
8,27
4,88
6,34
8,23
8,33
8,39
8,40
5,11
6,64
8,62
8,73
8,78
8,80
7,19
9,33
12,12
12,27
12,35
12,37
7,30
9,48
12,32
12,46
12,55
12,57
Be continued
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
19
R22
TABELLA 4A: Rese frigorifere dei regolatori della pressione di avviamento 3320 [kW]
Catalogue
Number
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,07
3320/9S
3320/M28S
0,14
0,21
0,07
3320/11S
Design evaporator temperature [°C]
Max allowable
suction
pressure
[bar] (1)
Pressure
drop across
regulator
[bar]
0,14
0,21
4,4
0
-5
-10
-15
-20
-25
-30
-35
-40
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
14,63
18,13
18,31
–
–
–
20,50
25,41
25,66
–
–
–
20,90
25,90
26,16
–
–
–
20,69
25,64
25,89
–
–
–
28,91
35,83
36,18
–
–
–
29,55
36,63
36,99
–
–
15,30
18,97
23,55
23,67
–
–
21,53
26,70
33,14
33,32
–
–
21,86
27,10
33,64
33,82
–
–
23,04
28,56
35,46
35,64
–
–
32,39
40,15
49,84
50,11
–
–
32,91
40,80
50,65
50,92
–
–
19,29
23,93
26,24
26,28
–
–
27,14
33,66
36,91
36,97
–
–
27,56
34,19
37,49
37,54
–
–
28,87
35,81
39,26
39,32
–
–
40,59
50,34
55,20
55,29
–
–
41,24
51,15
56,08
56,17
–
–
17,36
21,54
23,62
23,65
–
–
24,43
30,30
33,22
33,27
–
–
24,81
30,77
33,74
33,79
–
–
25,98
32,22
35,33
35,39
–
–
36,53
45,31
49,68
49,76
–
–
37,11
46,04
50,48
50,56
–
12,03
15,63
19,38
21,25
21,29
–
16,93
21,98
27,27
29,90
29,95
–
17,19
22,33
27,69
30,36
30,41
–
18,00
23,38
29,00
31,80
31,85
–
25,31
32,87
40,78
44,71
44,78
–
25,72
33,40
41,43
45,43
45,50
–
10,83
14,06
19,00
19,13
19,16
–
15,23
19,79
26,73
26,91
26,95
–
15,47
20,09
27,15
27,33
27,37
–
16,20
21,04
28,43
28,62
28,66
–
22,78
29,59
39,98
40,24
40,30
–
23,15
30,06
40,62
40,89
40,95
–
9,75
12,66
17,10
17,22
17,24
–
13,71
17,81
24,06
24,22
24,26
–
13,92
18,08
24,43
24,59
24,63
–
14,58
18,94
25,59
25,76
25,80
–
20,50
26,63
35,98
36,22
36,27
–
20,83
27,06
36,56
36,80
36,85
9,02
11,71
15,21
15,39
15,49
15,52
12,69
16,48
21,40
21,65
21,80
21,83
12,88
16,73
21,73
21,99
22,13
22,17
13,49
17,53
22,76
23,03
23,18
23,22
18,97
24,64
32,00
32,38
32,59
32,65
19,28
25,04
32,51
32,90
33,12
33,17
8,12
10,54
13,69
13,85
13,94
13,97
11,42
14,83
19,26
19,49
19,62
19,65
11,60
15,06
19,56
19,79
19,92
19,95
12,14
15,77
20,48
20,73
20,86
20,90
17,08
22,18
28,80
29,14
29,33
29,38
17,35
22,53
29,26
29,61
29,81
29,85
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
(1) This value is the valve pressure setting
TABLE 4B: Correction factor for liquid temperature different from nominal value
Liquid temperature [°C]
20
10
15
20
25
30
35
40
45
50
1,23
1,19
1,16
1,11
1,06
1,01
0,98
0,94
0,9
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R404A / R507
TABLE 5A: Refrigerant Flow Capacity of cranckcase pressure regulators 3320 [kW]
Catalogue
Number
Pressure
drop across
regulator
[bar]
0,07
3320/4
3320/M12S
3320/4S
0,14
0,21
0,07
3320/5
3320/5S
0,14
0,21
0,07
3320/7S
0,14
0,21
Max allowable
suction
pressure
[bar] (1)
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
Design evaporator temperature [°C]
4,4
0
-5
-10
-15
-20
-25
-30
-35
-40
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
3,65
4,53
5,63
–
–
–
5,21
6,47
8,04
–
–
–
5,16
6,42
7,97
–
–
–
4,39
5,45
6,77
–
–
–
6,10
7,58
9,42
–
–
–
6,27
7,78
9,67
–
–
–
6,71
8,33
10,35
–
–
–
9,35
11,62
14,43
–
–
–
9,58
11,91
14,79
–
–
–
5,72
7,11
7,14
–
–
–
8,17
10,15
10,20
–
–
–
8,12
10,09
10,14
–
–
–
7,05
8,76
8,80
–
–
–
9,87
12,26
12,32
–
–
–
10,07
12,51
12,58
–
–
–
10,66
13,24
13,31
–
–
–
14,92
18,54
18,64
–
–
–
15,23
18,92
19,02
–
–
5,81
7,20
7,90
7,92
–
–
8,29
10,29
11,29
11,32
–
–
8,34
10,35
11,35
11,38
–
–
7,19
8,93
9,79
9,82
–
–
10,09
12,52
13,73
13,77
–
–
10,28
12,75
13,99
14,02
–
–
10,76
13,36
14,65
14,69
–
–
15,09
18,72
20,54
20,59
–
–
15,38
19,08
20,93
20,98
–
–
5,23
6,48
7,11
7,13
–
–
7,46
9,26
10,16
10,18
–
–
7,51
9,32
10,22
10,24
–
–
6,47
8,03
8,81
8,83
–
–
9,08
11,27
12,36
12,39
–
–
9,25
11,48
12,59
12,62
–
–
9,69
12,02
13,19
13,22
–
–
13,58
16,85
18,48
18,53
–
–
13,84
17,17
18,84
18,88
–
3,62
4,70
5,83
6,40
6,42
–
5,17
6,72
8,33
9,14
9,17
–
5,20
6,76
8,38
9,20
9,22
–
4,49
5,83
7,23
7,93
7,95
–
6,29
8,17
10,14
11,12
11,15
–
6,41
8,32
10,33
11,33
11,36
–
6,71
8,72
10,82
11,87
11,90
–
9,41
12,22
15,16
16,63
16,68
–
9,59
12,46
15,45
16,95
17,00
–
3,26
4,23
6,45
5,76
5,77
–
4,66
6,05
9,22
8,23
8,25
–
4,68
6,08
9,27
8,28
8,30
–
4,04
5,24
8,00
7,14
7,16
–
5,66
7,36
11,22
10,01
10,04
–
5,77
7,49
11,42
10,20
10,22
–
6,04
7,85
11,97
10,68
10,71
–
8,47
11,00
16,77
14,97
15,01
–
8,63
11,21
17,10
15,26
15,30
–
2,93
3,81
5,81
5,18
5,20
–
4,19
5,44
8,30
7,41
7,42
–
4,21
5,47
8,35
7,45
7,47
–
3,63
4,72
7,20
6,42
6,44
–
5,10
6,62
10,10
9,01
9,03
–
5,19
6,74
10,28
9,18
9,20
–
5,44
7,06
10,77
9,61
9,64
–
7,62
9,90
15,10
13,47
13,51
–
7,77
10,09
15,39
13,73
13,77
3,06
3,98
5,17
5,23
4,67
4,68
4,38
5,68
7,38
7,47
6,67
6,68
4,40
5,72
7,42
7,51
6,70
6,72
3,80
4,93
6,40
6,48
5,78
5,80
5,32
6,91
8,98
9,09
8,11
8,13
5,42
7,04
9,14
9,25
8,26
8,28
5,68
7,38
9,58
9,69
8,65
8,67
7,96
10,34
13,43
13,59
12,13
12,16
8,11
10,54
13,68
13,85
12,36
12,39
2,76
3,58
4,65
4,70
4,20
4,21
3,94
5,11
6,64
6,72
6,00
6,01
3,96
5,14
6,68
6,76
6,03
6,05
3,42
4,44
5,76
5,83
5,20
5,22
4,79
6,22
8,08
8,18
7,30
7,32
4,88
6,34
8,23
8,33
7,43
7,45
5,11
6,64
8,62
8,72
7,79
7,81
7,16
9,30
12,08
12,23
10,91
10,94
7,30
9,48
12,32
12,46
11,12
11,15
Be continued
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
21
R404A / R507
TABLE 5A: Refrigerant Flow Capacity of cranckcase pressure regulators 3320 [kW]
Catalogue
Number
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,07
3320/9S
3320/M28S
0,14
0,21
0,07
3320/11S
Design evaporator temperature [°C]
Max allowable
suction
pressure
[bar] (1)
Pressure
drop across
regulator
[bar]
0,14
0,21
4,4
0
-5
-10
-15
-20
-25
-30
-35
-40
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
10,42
12,95
16,08
–
–
–
14,50
18,02
22,38
–
–
–
14,89
18,49
22,97
–
–
–
15,94
19,80
24,60
–
–
–
22,22
27,60
34,28
–
–
–
22,77
28,29
35,14
–
–
–
16,75
20,80
20,91
–
–
–
23,45
29,13
29,28
–
–
–
23,93
29,72
29,88
–
–
–
25,33
31,46
31,63
–
–
–
35,46
44,05
44,28
–
–
–
36,18
44,95
45,18
–
–
17,09
21,20
23,26
23,32
–
–
23,97
29,74
32,63
32,71
–
–
24,41
30,29
33,23
33,31
–
–
25,57
31,73
34,81
34,90
–
–
35,85
44,47
48,79
48,91
–
–
36,54
45,33
49,73
49,85
–
–
15,38
19,08
20,93
20,99
–
–
21,58
26,77
29,37
29,44
–
–
21,97
27,26
29,91
29,98
–
–
23,02
28,56
31,33
31,41
–
–
32,26
40,03
43,91
44,02
–
–
32,88
40,80
44,75
44,87
–
10,66
13,84
17,17
18,84
18,89
–
14,95
19,42
24,09
26,43
26,50
–
15,23
19,78
24,54
26,92
26,98
–
15,95
20,72
25,70
28,19
28,27
–
22,36
29,04
36,02
39,52
39,62
–
22,79
29,59
36,72
40,28
40,38
–
9,59
12,46
19,00
16,96
17,00
–
13,46
17,48
26,65
23,79
23,85
–
13,70
17,80
27,14
24,22
24,28
–
14,36
18,64
28,43
25,38
25,44
–
20,12
26,13
39,85
35,57
35,66
–
20,51
26,63
40,62
36,25
36,34
–
8,63
11,21
17,10
15,26
15,30
–
12,11
15,73
23,99
21,41
21,46
–
12,33
16,02
24,43
21,80
21,86
–
12,92
16,78
25,59
22,84
22,89
–
18,11
23,52
35,86
32,01
32,09
–
18,46
23,97
36,55
32,63
32,71
9,02
11,71
15,21
15,39
13,74
13,77
12,65
16,43
21,33
21,59
19,27
19,32
12,88
16,73
21,72
21,98
19,62
19,67
13,49
17,52
22,76
23,03
20,55
20,61
18,91
24,56
31,90
32,28
28,81
28,88
19,28
25,03
32,51
32,90
29,36
29,44
8,11
10,54
13,69
13,85
12,36
12,39
11,38
14,78
19,20
19,43
17,34
17,38
11,59
15,06
19,55
19,79
17,66
17,70
12,14
15,77
20,48
20,73
18,50
18,54
17,02
22,10
28,71
29,05
25,93
25,99
17,35
22,53
29,26
29,61
26,43
26,49
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
(1) This value is the valve pressure setting
TABLE 5B: Correction factor for liquid temperature different from nominal value
Liquid temperature [°C]
22
10
15
20
25
30
35
40
45
50
1,43
1,35
1,28
1,2
1,12
1,03
0,95
0,86
0,76
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R407C
TABLE 6A: Refrigerant Flow Capacity of cranckcase pressure regulators 3320 [kW]
Catalogue
Number
Pressure
drop across
regulator
[bar]
0,07
3320/4
3320/M12S
3320/4S
0,14
0,21
0,07
3320/5
3320/5S
0,14
0,21
0,07
3320/7S
0,14
0,21
Max allowable
suction
pressure
[bar] (1)
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
Design evaporator temperature [°C]
4,4
0
-5
-10
-15
-20
-25
-30
-35
-40
–
–
–
–
5,22
6,49
–
–
–
–
7,46
9,27
–
–
–
–
7,37
9,15
–
–
–
–
6,27
7,79
–
–
–
–
8,76
10,88
–
–
–
–
8,96
11,13
–
–
–
–
9,61
11,94
–
–
–
–
13,59
16,88
–
–
–
–
13,73
17,05
–
–
–
4,71
5,85
7,27
–
–
–
6,73
8,36
10,38
–
–
–
6,65
8,26
10,26
–
–
–
5,85
7,27
9,03
–
–
–
8,19
10,18
12,64
–
–
–
8,35
10,38
12,89
–
–
–
8,86
11,00
13,67
–
–
–
12,54
15,58
19,35
–
–
–
12,65
15,72
19,52
–
–
5,20
6,45
8,01
8,05
–
–
7,42
9,21
11,44
11,50
–
–
7,34
9,11
11,32
11,38
–
–
6,62
8,22
10,21
10,26
–
–
9,30
11,54
14,33
14,40
–
–
9,46
11,74
14,58
14,66
–
–
9,94
12,33
15,32
15,40
–
–
14,09
17,48
21,71
21,82
–
–
14,20
17,61
21,88
21,99
–
–
6,71
8,32
9,13
9,15
–
–
9,58
11,89
13,04
13,08
–
–
9,65
11,97
13,13
13,16
–
–
8,32
10,32
11,32
11,35
–
–
11,68
14,49
15,90
15,94
–
–
11,88
14,74
16,17
16,21
–
–
12,44
15,44
16,93
16,97
–
–
17,46
21,66
23,76
23,82
–
–
17,77
22,05
24,19
24,25
–
–
6,04
7,49
8,22
8,24
–
–
8,63
10,70
11,74
11,77
–
–
8,68
10,77
11,82
11,85
–
–
7,48
9,29
10,19
10,21
–
–
10,51
13,04
14,31
14,34
–
–
10,69
13,27
14,55
14,59
–
–
11,20
13,89
15,24
15,28
–
–
15,71
19,49
21,38
21,44
–
–
16,00
19,85
21,77
21,82
–
4,18
5,43
6,74
7,40
7,41
–
5,98
7,76
9,63
10,57
10,59
–
6,02
7,81
9,70
10,64
10,66
–
5,19
6,74
8,36
9,17
9,19
–
7,28
9,46
11,74
12,88
12,91
–
7,41
9,62
11,94
13,10
13,13
–
7,76
10,08
12,50
13,72
13,75
–
10,89
14,14
17,54
19,25
19,29
–
11,08
14,40
17,86
19,59
19,64
–
3,77
4,89
6,45
6,66
6,67
–
5,38
6,99
9,22
9,51
9,53
–
5,42
7,03
9,28
9,57
9,60
–
4,67
6,06
8,00
8,25
8,27
–
6,56
8,51
11,24
11,59
11,62
–
6,67
8,66
11,43
11,79
11,82
–
6,98
9,07
11,97
12,34
12,37
–
9,80
12,73
16,80
17,32
17,37
–
9,98
12,96
17,10
17,63
17,68
–
3,39
4,40
5,81
5,99
6,01
–
4,84
6,29
8,30
8,56
8,58
–
4,87
6,33
8,35
8,62
8,64
–
4,20
5,46
7,20
7,43
7,44
–
5,90
7,66
10,11
10,43
10,46
–
6,00
7,79
10,29
10,61
10,64
–
6,28
8,16
10,77
11,11
11,14
–
8,82
11,45
15,12
15,59
15,63
–
8,98
11,66
15,39
15,87
15,91
3,06
3,98
5,17
5,23
5,39
5,40
4,38
5,68
7,38
7,47
7,70
7,72
4,41
5,72
7,43
7,52
7,75
7,77
3,80
4,93
6,40
6,48
6,68
6,70
5,33
6,93
8,99
9,10
9,39
9,41
5,42
7,04
9,15
9,26
9,55
9,57
5,68
7,38
9,58
9,69
10,00
10,02
7,97
10,35
13,44
13,60
14,03
14,07
8,11
10,54
13,69
13,85
14,28
14,32
2,76
3,58
4,65
4,70
4,85
4,86
3,94
5,11
6,64
6,72
6,93
6,95
3,96
5,15
6,69
6,77
6,98
7,00
3,42
4,44
5,76
5,83
6,02
6,03
4,80
6,23
8,09
8,19
8,45
8,47
4,88
6,34
8,23
8,33
8,59
8,61
5,11
6,64
8,62
8,73
9,00
9,02
7,17
9,32
12,10
12,24
12,63
12,66
7,30
9,48
12,32
12,46
12,85
12,89
Be continued
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
23
R407C
TABLE 6A: Refrigerant Flow Capacity of cranckcase pressure regulators 3320 [kW]
Catalogue
Number
Pressure
drop across
regulator
[bar]
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,7
1,4
2,1
3,5
4,2
5,5
0,07
3320/4
3320/M12S
3320/4S
0,14
0,21
0,07
3320/5
3320/5S
Design evaporator temperature [°C]
Max allowable
suction
pressure
[bar] (1)
0,14
0,21
4,4
0
-5
-10
-15
-20
-25
-30
-35
-40
–
–
–
–
14,90
18,51
–
–
–
–
20,81
25,85
–
–
–
–
21,29
26,44
–
–
–
–
22,83
28,35
–
–
–
–
32,28
40,10
–
–
–
–
32,61
40,51
–
–
–
13,89
17,26
21,44
–
–
–
19,46
24,18
30,03
–
–
–
19,85
24,66
30,63
–
–
–
21,04
26,13
32,47
–
–
–
29,79
37,01
45,97
–
–
–
30,05
37,34
46,38
–
–
15,73
19,52
24,25
24,37
–
–
22,09
27,41
34,04
34,22
–
–
22,47
27,88
34,64
34,82
–
–
23,61
29,29
36,39
36,58
–
–
33,47
41,52
51,58
51,85
–
–
33,73
41,85
51,98
52,25
–
–
19,76
24,51
26,89
26,96
–
–
27,75
34,42
37,76
37,86
–
–
28,23
35,02
38,42
38,51
–
–
29,56
36,67
40,23
40,33
–
–
41,48
51,46
56,45
56,59
–
–
42,22
52,39
57,47
57,61
–
–
17,78
22,06
24,20
24,26
–
–
24,97
30,98
33,99
34,07
–
–
25,40
31,52
34,57
34,66
–
–
26,60
33,00
36,20
36,29
–
–
37,33
46,31
50,81
50,93
–
–
38,00
47,15
51,72
51,85
–
12,32
16,00
19,86
21,78
21,84
–
17,31
22,47
27,88
30,59
30,67
–
17,60
22,86
28,37
31,12
31,19
–
18,43
23,94
29,70
32,58
32,67
–
25,87
33,60
41,68
45,72
45,84
–
26,33
34,20
42,43
46,55
46,66
–
11,09
14,40
19,01
19,60
19,65
–
15,57
20,23
26,69
27,53
27,60
–
15,84
20,58
27,15
28,00
28,07
–
16,59
21,55
28,44
29,33
29,40
–
23,28
30,24
39,90
41,15
41,26
–
23,70
30,78
40,62
41,89
42,00
–
9,98
12,96
17,11
17,64
17,69
–
14,02
18,20
24,02
24,78
24,84
–
14,26
18,52
24,44
25,20
25,27
–
14,93
19,39
25,59
26,39
26,46
–
20,95
27,21
35,91
37,04
37,13
–
21,33
27,70
36,56
37,70
37,80
9,02
11,72
15,22
15,40
15,88
15,92
12,67
16,45
21,37
21,62
22,30
22,35
12,89
16,74
21,74
22,00
22,68
22,74
13,49
17,53
22,76
23,03
23,75
23,81
18,94
24,59
31,94
32,32
33,33
33,42
19,28
25,04
32,52
32,90
33,93
34,02
8,12
10,54
13,69
13,86
14,29
14,33
11,40
14,81
19,23
19,46
20,07
20,12
11,60
15,06
19,56
19,80
20,42
20,47
12,15
15,77
20,48
20,73
21,38
21,43
17,04
22,13
28,75
29,09
30,00
30,08
17,35
22,53
29,26
29,61
30,54
30,62
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
(1) This value is the valve pressure setting
TABLE 6B: Correction factor for liquid temperature different from nominal value
Liquid temperature [°C]
24
10
15
20
25
30
35
40
45
50
1,3
1,25
1,2
1,14
1,09
1,03
0,97
0,9
0,84
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
EVAPORATING PRESSURE
REGULATORS SERIES 3330
Approved by Underwriters Laboratories Inc.
until the limit of the stoke is reached and the valve is
completely open. Once the shutter is fully opened, only an
increase in pressure drop across the valve will increase
valve capacity. Regulators series 3330 regulate only
in dependence on the inlet pressure change, pressure
change on the outlet side do not affect the degree of
opening since the valve is equipped with an equalization
bellow with an effective area equal to valve seat. The
factory pressure setting of these valves is 2 bar, this
means that until the evaporating pressure is below the
2 bar the valve remains closed, when the evaporating
pressure rise above the 2 bar the valve begin to open.
According to the characteristics of the refrigerating
system it can be necessary to change the valve setting
adjusting the setting screw on the top of the body; the
pressure setting range is from 0 bar up to 5,5 bar.
CONSTRUCTION
APPLICATIONS
The evaporating pressure regulators series 3330, shown
in this chapter, are classified “Pressure accessories” in
the sense of the Pressure Equipment Directive 94/23/EC,
Article 1, Section 2.1.4 and are subject of Article 3, Section
1.3 of the same Directive.
They are designed to operate on refrigerating systems,
which use the following refrigerant fluids: R22 , R134a ,
R404A , R407C , R507 proper to the Group II (as defined in
Article 9, Section 2.2 of Directive 97/23/EC and referred to
in Directive 67/548/EEC).
The evaporating pressure regulator is an accessory
designed to maintain a constant evaporating pressure
and thereby a constant surface temperature on the
evaporator under varying evaporator load. This valve
prevents too low evaporating pressure and therefore
protects against freezing in water chiller or against coil
icing in air evaporators. The 3330 regulators are also used
to differentiate the evaporating pressures in two or more
evaporators in systems with one compressor.
OPERATION
Evaporating pressure regulators series 3330 adjust
the flow of gaseous refrigerant according to changes
of suction pressure, upstream the regulator. When the
evaporating pressure is below the valve setting, the
shutter remain closed. As the evaporating pressure rises
above the valve setting, the shutter begins to open and
the amount of its opening is proportional to the change
of evaporating pressure. As the evaporating pressure
continues to rise, the shutter continues to open farther
REGULATING VALVES FOR REFRIGERATING SYSTEMS
The main parts of evaporating pressure regulators series
3330 are made with the following materials:
• Hot forged brass EN 12420 – CW 617N for body
• Copper tube EN 12735-1 – Cu-DHP for solder
connections
• Austenitic stainless steel AISI 321 for bellow
• Austenitic stainless steel AISI 303 for shutter
• Brass bar EN 12164 – CW 614N for setting screw
• Spring steel DIN 17223/84 Class C/D for setting spring
• Chloroprene rubber (CR) for outlet seal gaskets
INSTALLATION
Evaporating pressure regulators series 3330 are installed
in the suction line between the evaporator and the
compressor. There are two common types of installation:
•Refrigerating system with one compressor serving
two or more evaporators in parallel, where the same
evaporating temperature is required. In this case the
3330 regulator is installed on the common suction line.
•Refrigerating system with one compressor serving
two or more evaporators in parallel, where different
evaporating temperature are required. In this case the
3330 regulator is installed downstream the evaporator
with the highest temperature. Downstream the
evaporators with the lower temperature it is necessary
to install a check valve to avoid condensing refrigerant
during compressor stops.
SELECTION
A correct selection of evaporating pressure regulators
series 3330 is possible if complete system information are
available. The selection involves these basic items:
1.Refrigerant
2.Designed evaporator capacity
ed. 001-RP-ENG
25
3.Designed evaporating temperature
4.Minimum evaporating temperature. This data is the
valves setting.
5.Allowable pressure drop across the valves at design
load condition
6.Liquid temperature
Minimum allowable suction temperature
(setting valve):
The refrigerating capacities indicated on tables 3A, 4A,
5A, 6A are based on:
• a reference liquid temperature of 36,7 °C.
• an allowable change of evaporating pressure of 0,56 bar
1.Fix, by means of the table 5B, the correction factor for
liquid temperature TLiquid = 40 °C.
K T liquido = 0,95
With liquid temperature different from 36,7 °C and
evaporating pressure change different from 0,56 bar the
required capacity of regulator shall be:
2.Fix, by means of the table 5C, the correction
factor for the evaporating pressure change:
∆P = PT design - PT min sction = 5-4,2 = 0,8 bar
Qevap
K T liquid x KΔ∆P evap
-5 [°C]
(corresp. to 4,2 [bar])
Allowable pressure drop across the valves:
Liquid temperature:
Solder connections
0,42 [bar]
40 [°C]
K ∆Pevap = 1,3
3.Calculate the capacity required to the regulator.
Qevap
4
=
= 3,23 kW
Qvalve =
0,95 x 1,3
K T liquid x K ∆P evap
= Qvalve
with:
Qevap = Evaporator capacity. [kW]
K T liquid = Correction factor for T liquid ≠ 36,7 °C.
K ∆P evap = Correction factor for Δ∆P valve ≠ 0,56 bar.
Qvalve = Refrigerating capacity requested to regulator [kW]
4.With the following parameters:
• Minimum capacity = 3,23 KW
• Evaporating temperature = 0 °C
• Pressure drop across the valves = 0,42 bar
EXAMPLE
Choose the proper valve in table 5A.
The select valves are:
• 3330/M12 with solder connections diameter 12 mm
• 3330/4 with solder connections diameter 1/2”
Refrigerant:
R404A
Evaporator capacity:
4 [kW]
Designed evaporating temperature:
0 [°C]
(corresp. to 5 [bar])
CONDENSER
EVAPORATOR
CONDENSER
EVAPORATOR
3330
3330
EVAPORATOR
EVAPORATOR
Installation (1)
Installation (2)
Refrigerating systems with a single compressor serving multiple evaporators
in parallel, where the same evaporation pressure is required.
The valve is installed on the common suction pipe.
Refrigerating systems with multiple evaporators which work with different
evaporation pressures. The regulator is installed downstream of the evaporator
with the highest pressure.
26
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
TABLE 1: General characteristics of evaporator pressure regulators 3330
Connections
Catalogue
Number
ODS
SAE
Flare
Ø [in.]
Ø [mm]
1/2”
–
–
3330/M12S
–
–
12
3330/4S
–
1/2”
–
3330/5
5/8”
–
–
3330/5S
–
5/8”
16
3330/7S
–
7/8”
22
3330/9S
–
1.1/8"
–
3330/M28S
–
–
28
3330/11S
–
1.3/8"
35
3330/4
Kv
Factor
[m3/h]
Regulating
range [bar]
min.
max.
0,2
5,5
TS [°C]
Factory
setting
[bar]
min.
2
-40
max.
PS
[bar]
Risk Category
according
to PED
+110
28
Art. 3.3
2,70
8,4
TABLE 2: Dimensions and Weights of regulators 3330
Catalogue
Number
Dimensions [mm]
Weight
[g]
H
H1
H2
L
3330/4
159
76,5
45,5
48
510
3330/M12S
183
100,5
69,5
64
480
3330/4S
183
100,5
69,5
64
3330/5
163
80,5
49,5
52
3330/5S
183
100,5
69,5
64
500
3330/7S
194
112
81
75,5
560
3330/9S
263
151
111
105
1450
3330/M28S
263
151
111
105
3330/11S
263
151
111
105
REGULATING VALVES FOR REFRIGERATING SYSTEMS
L1
37
44
D
32
46
480
540
1450
1460
ed. 001-RP-ENG
27
R134a
TABLE 3A: Refrigerant Flow Capacity of evaporator pressure regulators 3330 [kW]
Catalogue
Number
Design evaporator temperature [°C]
Pressure
drop across
regulator
[bar]
20
15
10
5
0
-5
-10
-15
-20
-25
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
1,10
2,27
3,70
5,62
7,17
10,16
1,42
2,89
4,37
6,08
8,02
10,80
1,42
2,92
5,27
7,63
10,81
13,99
4,47
9,07
13,71
19,09
25,18
33,93
4,34
8,94
16,17
23,39
33,15
42,90
0,99
2,03
3,26
4,91
6,18
8,63
1,28
2,60
3,93
5,47
7,20
9,67
1,27
2,61
4,64
6,67
9,28
11,88
4,03
8,18
12,35
17,20
22,60
30,38
3,90
7,99
14,22
20,45
28,45
36,45
0,88
1,79
2,83
4,21
5,18
7,10
1,15
2,32
3,50
4,87
6,38
8,54
1,13
2,30
4,00
5,71
7,74
9,78
3,60
7,29
11,00
15,30
20,03
26,83
3,46
7,05
12,28
17,51
23,75
29,99
0,77
1,55
2,39
3,50
4,18
5,58
1,01
2,04
3,07
4,27
5,56
7,41
0,99
1,99
3,37
4,75
6,21
7,68
3,16
6,40
9,64
13,40
17,45
23,29
3,02
6,10
10,33
14,57
19,05
23,54
0,67
1,34
2,01
2,88
3,44
4,59
0,89
1,80
2,70
3,74
4,87
6,50
0,86
1,72
2,59
3,91
4,74
6,32
2,80
5,65
8,48
11,75
15,30
20,41
2,64
5,27
7,94
11,99
14,54
19,38
0,57
1,13
1,63
2,26
–
–
0,77
1,56
2,33
3,21
–
–
0,73
1,45
2,26
3,07
–
–
2,43
4,91
7,32
10,09
–
–
2,25
4,45
6,93
9,42
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
3330/4
3330/M12S
3330/4S
3330/5
3330/5S
3330/7S
3330/9S
3330/M28S
3330/11S
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
Nominal evaporator pressure change
(Tdesign evap - Tmin evap ) : 8 psi (0,56 bar)
TABLE 3B: Correction factor for liquid temperature different from nominal value
Liquid temperature [°C]
10
15
20
25
30
35
40
45
50
1,28
1,23
1,18
1,13
1,08
1,03
0,97
0,92
0,86
TABLE 3C: Correction factor for evaporator pressure change different from nominal value
Evaporator pressure change [bar]
28
0,14
0,28
0,42
0,56
0,7
0,84
0,98
1,12
0,3
0,6
0,8
1
1,2
1,3
1,4
1,5
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R22
TABLE 4A: Refrigerant Flow Capacity of evaporator pressure regulators 3330 [kW]
Catalogue
Number
Pressure
drop across
regulator
[bar]
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
3330/4
3330/M12S
3330/4S
3330/5
3330/5S
3330/7S
3330/9S
3330/M28S
3330/11S
Design evaporator temperature [°C]
4,4
0
-5
-10
-15
-20
-25
-30
-35
-40
1,29
2,66
4,68
7,51
9,72
13,85
1,64
3,30
5,01
7,00
9,30
12,58
1,62
3,45
6,04
10,09
13,41
19,44
5,14
10,35
15,75
22,00
29,20
39,52
4,96
10,57
18,53
30,94
41,12
59,63
1,18
2,41
4,20
6,70
8,56
12,07
1,49
2,99
4,55
6,35
8,41
11,38
1,47
3,11
5,41
9,00
11,81
16,95
4,67
9,40
14,28
19,94
26,43
35,73
4,51
9,55
16,60
27,59
36,22
51,99
1,06
2,15
3,71
5,88
7,40
10,30
1,34
2,69
4,08
5,69
7,53
10,17
1,32
2,78
4,79
7,90
10,21
14,47
4,21
8,45
12,82
17,88
23,65
31,94
4,05
8,52
14,68
24,24
31,31
44,36
0,95
1,90
3,26
5,13
6,30
8,61
1,21
2,42
3,67
5,11
6,75
9,09
1,18
2,46
4,20
6,89
8,70
12,09
3,79
7,60
11,52
16,06
21,19
28,55
3,63
7,54
12,88
21,13
26,68
37,09
0,83
1,65
2,80
4,37
5,21
6,92
1,07
2,15
3,26
4,53
5,96
8,01
1,04
2,14
3,61
5,88
7,19
9,72
3,37
6,76
10,23
14,24
18,72
25,16
3,20
6,56
11,07
18,02
22,04
29,81
0,77
1,52
2,50
3,82
4,55
6,06
1,00
2,00
3,02
4,20
5,50
7,38
0,96
1,97
3,22
5,13
6,28
8,50
3,14
6,29
9,49
13,19
17,28
23,18
2,95
6,04
9,88
15,73
19,27
26,08
0,70
1,39
2,20
3,26
3,90
5,19
0,92
1,85
2,79
3,86
5,05
6,75
0,88
1,80
2,84
4,39
5,38
7,28
2,90
5,81
8,75
12,14
15,85
21,20
2,70
5,52
8,70
13,45
16,49
22,34
0,64
1,26
1,90
2,71
3,24
4,32
0,85
1,70
2,55
3,53
4,59
6,12
0,80
1,63
2,45
3,64
4,47
6,07
2,67
5,34
8,01
11,09
14,42
19,22
2,45
5,00
7,51
11,16
13,71
18,60
0,58
1,13
1,60
2,16
2,58
3,45
0,78
1,55
2,31
3,20
4,13
5,49
0,72
1,46
2,06
2,89
3,56
4,85
2,44
4,86
7,27
10,04
12,98
17,24
2,20
4,48
6,33
8,88
10,93
14,87
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
Nominal evaporator pressure change
(Tdesign evap - Tmin evap ) : 8 psi (0,56 bar)
TABLE 4B: Correction factor for liquid temperature different from nominal value
Liquid temperature [°C]
10
15
20
25
30
35
40
45
50
1,23
1,19
1,16
1,11
1,06
1,01
0,98
0,94
0,9
TABLE 4C: Correction factor for evaporator pressure change different from nominal value
Evaporator pressure change [bar]
0,14
0,28
0,42
0,56
0,7
0,84
0,98
1,12
0,3
0,6
0,8
1
1,2
1,3
1,4
1,5
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
29
R404A / R507
TABLE 5A: Refrigerant Flow Capacity of evaporator pressure regulators 3330 [kW]
Catalogue
Number
Design evaporator temperature [°C]
Pressure
drop across
regulator
[bar]
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
3330/4
3330/M12S
3330/4S
3330/5
3330/5S
3330/7S
3330/9S
3330/M28S
3330/11S
4,4
0
-5
-10
-15
-20
-25
-30
-35
-40
1,24
2,50
4,08
6,16
8,38
12,49
1,56
3,18
4,79
6,67
8,86
11,95
1,72
3,56
5,79
8,67
11,56
17,22
4,89
9,98
15,05
20,96
27,82
37,54
5,29
10,90
17,75
26,59
35,46
52,80
1,11
2,23
3,63
5,46
7,34
10,83
1,40
2,85
4,30
5,99
7,93
10,69
1,55
3,18
5,14
7,69
10,12
14,93
4,40
8,95
13,50
18,80
24,91
33,59
4,75
9,74
15,78
23,57
31,05
45,80
0,99
1,96
3,17
4,76
6,30
9,17
1,24
2,53
3,81
5,30
7,01
9,43
1,38
2,80
4,50
6,70
8,69
12,65
3,91
7,93
11,96
16,64
22,01
29,63
4,22
8,57
13,81
20,55
26,64
38,80
0,87
1,73
2,76
4,11
5,35
7,68
1,09
2,21
3,32
4,62
6,09
8,18
1,21
2,46
3,92
5,79
7,38
10,59
3,41
6,95
10,44
14,51
19,14
25,70
3,71
7,55
12,02
17,75
22,62
32,48
0,75
1,49
2,35
3,47
4,40
6,19
0,93
1,90
2,84
3,94
5,18
6,93
1,05
2,13
3,34
4,88
6,07
8,53
2,92
5,96
8,93
12,38
16,26
21,78
3,21
6,52
10,24
14,96
18,60
26,17
0,69
1,37
2,12
3,10
3,88
5,39
0,87
1,76
2,64
3,66
4,80
6,42
0,96
1,94
3,02
4,37
5,35
7,44
2,72
5,54
8,30
11,50
15,07
20,15
2,94
5,96
9,25
13,40
16,42
22,80
0,62
1,24
1,90
2,74
3,37
4,60
0,80
1,63
2,44
3,38
4,42
5,90
0,87
1,76
2,69
3,86
4,64
6,34
2,52
5,13
7,67
10,62
13,88
18,52
2,66
5,40
8,26
11,83
14,24
19,44
0,56
1,11
1,67
2,38
2,85
3,80
0,74
1,50
2,24
3,10
4,04
5,38
0,78
1,58
2,37
3,35
3,93
5,24
2,32
4,71
7,04
9,74
12,69
16,90
2,39
4,85
7,27
10,27
12,05
16,07
0,50
0,98
1,44
2,02
2,33
3,00
0,68
1,37
2,04
2,82
3,66
4,86
0,69
1,40
2,05
2,84
3,22
4,14
2,12
4,30
6,40
8,86
11,50
15,27
2,12
4,29
6,28
8,71
9,87
12,70
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
Nominal evaporator pressure change
(Tdesign evap - Tmin evap ) : 8 psi (0,56 bar)
TABLE 5B: Correction factor for liquid temperature different from nominal value
Liquid temperature [°C]
10
15
20
25
30
35
40
45
50
1,43
1,35
1,28
1,2
1,12
1,03
0,95
0,86
0,76
TABLE 5C: Correction factor for evaporator pressure change different from nominal value
Evaporator pressure change [bar]
30
0,14
0,28
0,42
0,56
0,7
0,84
0,98
1,12
0,3
0,6
0,8
1
1,2
1,3
1,4
1,5
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R407C
TABLE 6A: Refrigerant Flow Capacity of evaporator pressure regulators 3330 [kW]
Catalogue
Number
Design evaporator temperature [°C]
Pressure
drop across
regulator
[bar]
15
10
4,4
0
-5
-10
-15
-20
-25
-30
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
1,07
2,19
3,55
5,27
6,88
9,74
1,37
2,77
4,19
5,71
7,71
10,37
1,37
2,80
5,00
7,24
10,35
13,46
4,32
8,71
13,15
17,92
24,20
32,57
4,19
8,58
15,34
22,20
31,74
41,27
0,96
1,96
3,13
4,60
5,92
8,27
1,24
2,50
3,77
5,14
6,92
9,29
1,23
2,50
4,40
6,33
8,88
11,43
3,90
7,86
11,85
16,14
21,72
29,17
3,76
7,67
13,49
19,40
27,24
35,06
0,91
1,84
2,92
4,27
5,45
7,54
1,17
2,37
3,57
4,85
6,52
8,74
1,16
2,35
4,10
5,87
8,15
10,42
3,69
7,43
11,20
15,25
20,48
27,46
3,55
7,21
12,57
18,01
24,99
31,96
0,85
1,72
2,71
3,94
4,97
6,81
1,11
2,23
3,36
4,57
6,13
8,20
1,09
2,20
3,80
5,42
7,42
9,41
3,48
7,00
10,55
14,36
19,24
25,76
3,34
6,76
11,65
16,61
22,74
28,86
0,81
1,63
2,55
3,69
4,58
6,21
1,05
2,11
3,18
4,33
5,79
7,73
1,03
2,08
3,33
5,07
6,61
8,58
3,29
6,63
9,99
13,59
18,17
24,28
3,16
6,38
10,22
15,55
20,27
26,30
0,76
1,53
2,38
3,44
4,20
5,60
0,99
1,99
3,00
4,08
5,45
7,26
0,97
1,96
2,87
4,72
5,81
7,74
3,11
6,25
9,43
12,83
17,11
22,81
2,98
6,00
8,79
14,49
17,81
23,74
0,65
1,29
1,93
2,70
3,30
4,40
0,86
1,73
2,59
3,51
4,68
6,24
0,83
1,65
2,48
3,71
4,56
6,08
2,70
5,43
8,13
11,02
14,70
19,60
2,55
5,06
7,61
11,38
13,98
18,65
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
0,07
0,14
0,21
0,35
0,42
0,56
3330/4
3330/M12S
3330/4S
3330/5
3330/5S
3330/7S
3330/9S
3330/M28S
3330/11S
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
Nominal evaporator pressure change
(Tdesign evap - Tmin evap ) : 8 psi (0,56 bar)
TABLE 6B: Correction factor for liquid temperature different from nominal value
Liquid temperature [°C]
10
15
20
25
30
35
40
45
50
1,3
1,25
1,2
1,14
1,09
1,03
0,97
0,9
0,84
TABLE 6C: Correction factor for evaporator pressure change different from nominal value
Evaporator pressure change [bar]
0,14
0,28
0,42
0,56
0,7
0,84
0,98
1,12
0,3
0,6
0,8
1
1,2
1,3
1,4
1,5
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
31
CONDENSING PRESSURE REGULATORS
SERIES 3340
Approved by Underwriters Laboratories Inc.
valve by-passes hot gas from the compressor discharge
to the receiver thus raising liquid pressure in the receiver.
OPERATION
APPLICATIONS
The condensing pressure regulators series 3340, shown
in this chapter, are classified “Pressure accessories” in
the sense of the Pressure Equipment Directive 94/23/EC,
Article 1, Section 2.1.4 and are subject of Article 3, Section
1.3 of the same Directive.
They are designed to operate on refrigerating systems,
which use the following refrigerant fluids: R22 , R134a ,
R404A , R407C , R507 proper to the Group II (as defined in
Article 9, Section 2.2 of Directive 97/23/EC and referred to
in Directive 67/548/EEC).
The design of air conditioning and refrigerating system
utilizing air cooled condensing units that will be subject to
wide range of ambient temperature it is very important to
foresee an accurate control of condenser capacity. As the
condensing unit, properly sized, will operate satisfactorily
during high ambient temperature, it follows that the
capacity control needs at low ambient temperature.
Good condensing pressure control during low ambient
temperature avoids problems during running cycle of
system and helps the start-up. Particularly this control
maintain a minimum pressure differential across the
orifice of the thermostatic expansion valve so that the
TEV’s capacity can match the evaporator load. Condensing
pressure regulators series 3340, together with differential
valves series 3136, are the solution to this control need. The
3340 regulator restricts the liquid flow from the condenser
to the receiver, thus reducing the active condenser surface
and raising the condensing pressure. The 3136 differential
32
ed. 001-RP-ENG
Condensing pressure regulators series 3340 adjust the
flow of liquid refrigerant (hot gas) according to changes
of condensing (compressor discharge) pressure, upstream
the regulator. When the condensing (discharge) pressure
is below the valve setting, the shutter remain closed.
As the condensing (discharge) pressure rises above the
valve setting, the shutter begins to open and the amount
of its opening is proportional to the change of condensing
(discharge) pressure. As the condensing (discharge) pressure
continues to rise, the shutter continues to open farther until
the limit of the stoke is reached and the valve is completely
open. Once the shutter is fully opened, only an increase in
pressure drop across the valve will increase valve capacity.
Regulators series 3340 regulate only in dependence on the
inlet pressure change, pressure change on the outlet side do
not affect the degree of opening since the valve is equipped
with an equalization bellow with an effective area equal
to valve seat. The factory pressure setting of these valves
is 8 bar, this means that until the condensing (discharge)
pressure is below the 8 bar the valve remains closed, when
the condensing (discharge) pressure rise above the 8 bar
the valve begin to open. According to the characteristics of
the refrigerating system it can be necessary to change the
valve setting adjusting the setting screw on the top of the
body; the pressure setting range is from 3 bar up to 20 bar.
The 3136 valves adjust the flow of hot gas to the liquid
receiver according to the differential pressure between
compressor discharge and liquid receiver. These valves
begin to open when the differential pressure reaches 1,4
bar and are fully open when differential pressure is 3 bar.
COSTRUCTION
The main parts of condensing pressure regulators series
3340 are made with the following materials:
• Hot forged brass EN 12420 – CW 617N for body
• Copper tube EN 12735-1 – Cu-DHP for solder
connections
• Austenitic stainless steel AISI 321 for bellow
• Austenitic stainless steel AISI 303 for shutter
• Brass bar EN 12164 – CW 614N for setting screw
• Spring steel DIN 17223/84 Class C/D for setting spring
• Chloroprene rubber (CR) for outlet seal gaskets
INSTALLATION
Condensing pressure regulators series 3340 can be
mounted in two locations of the refrigerating system:
• In the liquid line between the condenser and the liquid
receiver ( for regulator selection see tables 3A, 4A, 5A,
6A related to liquid line). The 3136 valve is mounted
REGULATING VALVES FOR REFRIGERATING SYSTEMS
between the compressor discharge and the inlet of
liquid receiver. This choice need a regulator with smaller
size because it is controlling liquid refrigerant , but it is
more suitable in temperate climate
• In the discharge line between the compressor and the
condenser ( for regulator selection see tables 3B, 4B, 5B,
6B related to hot gas line). The 3136 valve is mounted
between the compressor discharge and the inlet of
liquid receiver and it is also necessary to install a 3132
check valve between condenser outlet and receiver inlet
to prevent liquid migration during an off cycle.. This
choice need a regulator with bigger size because it is
controlling gaseous refrigerant, but it is more suitable in
very cold climate
SELECTION
A correct selection of condensing pressure regulators
series 3340 is possible if complete system information are
available. The selection involves these basic items:
1. Refrigerant
2. Designed evaporator (system) capacity
3. Evaporating temperature
4. Condensing temperature
5. Allowable condensing pressure change
6. Allowable pressure drop across the valves
with:
Qevap = Evaporator capacity. [kW]
KT evap = Correction factor for T evap ≠ 4,4 °C.
Qvalve = Refrigerating capacity requested to regulator [kW]
EXAMPLE
Refrigerant:
Evaporator capacity:
Designed evaporating temperature:
Condensing temperature:
Allowable condensing pressure change:
Allowable pressure drop across the valves:
Solder connections
R404A
20 [kW]
0 [°C]
40 [°C]
1,5 [bar]
0,31 [bar]
1.Fix, by means of the table 5C, the correction
factor for evaporating temperature Tevap = 0 °C.
K T evap = 1,02
2.Calculate the capacity required to the regulator.
Qevap
20
Qvalve =
=
= 19,60 kW
K T evap
1,02
The refrigerating capacities indicated on tables 3A, 3B, 4A,
4B, 5A, 5B, 6A,6B are based on a reference evaporating
temperature of 4,4 °C.
3.With the following parameters:
• Minimum capacity = 19,60 KW
• Condensing temperature = 40 °C
• Condensing pressure change = 1,5 bar
• Pressure drop across the valves = 0,31 bar
With evaporating temperature different from 4,4 °C the
required capacity of regulator shall be:
Choose the proper valve in table 5A. The select valve is
3340/5S
Qevap
K T liquid
= Qvalve
3340
CONDENSER
CONDENSER
3340
3136
3136
CONDENSER
3136
3136
CONDENSER
Installation (1)
Installation (2)
Refrigerating systems with air condensers. The regulator is installed at the
condenser outlet on the liquid line, before the liquid receiver.
Injection valve 3136 guarantees sufficiently high pressure under variable
conditions (min. diff. 1.4 bar / max 3 bar).
Refrigerating systems with air condenser and receiver installed in very cold
environments.
The regulator is installed upstream of the condenser.
Injection valve 3136 ensures that the receiver has suffi ciently high pressure.
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
33
TABLE 1A: General characteristics of condensing pressure regulators 3340
Connections
Catalogue
Number
ODS
SAE
Flare
Ø [in.]
Ø [mm]
1/2”
–
–
3340/M12S
–
–
12
3340/4S
–
1/2”
–
3340/5
5/8”
–
–
3340/5S
–
5/8”
16
3340/7S
–
7/8”
22
3340/9S
–
1.1/8"
–
3340/M28S
–
–
28
3340/11S
–
1.3/8"
35
3340/4
Kv
Factor
[m3/h]
Regulating
range [bar]
min.
max.
3
20
TS [°C]
Factory
setting
[bar]
min.
8
-40
max.
PS
[bar]
Risk Category
according
to PED
+110
28
Art. 3.3
2,70
8,4
TABLE 1B: General characteristics of differential valves 3136
Connections
Catalogue
Number
ODS
SAE
Flare
Ø [in.]
Ø [mm]
3136/M12
–
–
12
3136/4
–
1/2”
–
TS [°C]
Working
range [bar]
Kv
Factor
[m3/h]
1,50
min.
max.
1,4
3
min.
max.
PS
[bar]
-40
+110
45
Risk Category
according
to PED
Art. 3.3
TABLE 2: Dimensions and Weights of regulators 3340
Catalogue
Number
Dimensions [mm]
H1
H2
L
3340/4
159
76,5
45,5
48
510
3340/M12S
183
100,5
69,5
64
506
3340/4S
183
100,5
69,5
64
3340/5
163
80,5
49,5
52
3340/5S
183
100,5
69,5
64
506
3340/7S
194
112
81
75,5
570
3340/9S
263
151
111
105
1520
3340/M28S
263
151
111
105
3340/11S
263
151
111
105
34
ed. 001-RP-ENG
L1
37
44
D
Weight
[g]
H
32
46
506
550
1520
1530
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R134a
TABLE 3A: Refrigerant Flow Capacity of condensing pressure regulators 3340 [kW]. Liquid line
Catalogue
Number
Condensing
pressure
change [bar] (1)
1,5
3340/4
3340/M12S
3340/4S
3
1,5
3340/5
3340/5S
3
1,5
3340/7S
3
1,5
3340/9S
3340/M28S
3
1,5
3340/11S
3
Condensing temperature [°C]
Pressure drop
across regulator
[bar]
10
15
20
25
30
35
40
45
50
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
17,93
26,22
45,70
61,82
77,67
106,45
32,36
46,39
73,39
104,52
128,57
174,27
29,89
43,71
76,17
103,03
129,46
177,42
53,93
77,32
122,31
174,21
214,29
290,44
38,91
56,59
89,88
128,43
158,18
209,46
60,79
86,43
134,24
187,42
226,69
293,29
93,88
137,28
239,25
323,58
406,59
557,24
169,38
242,83
384,15
547,14
673,03
912,20
119,33
173,53
275,63
393,87
485,10
642,33
186,43
265,06
411,67
574,77
695,17
899,42
17,05
24,80
43,03
57,92
72,46
99,02
31,29
44,80
70,82
100,74
123,78
167,14
28,42
41,33
71,72
96,54
120,76
165,03
52,15
74,67
118,03
167,90
206,29
278,57
38,73
55,99
88,50
125,80
154,18
203,51
60,70
86,19
133,75
186,50
225,29
290,33
89,26
129,82
225,25
303,20
379,28
518,31
163,78
234,51
370,71
527,34
647,92
874,92
118,77
171,70
271,39
385,79
472,83
624,10
186,16
264,31
410,17
571,94
690,88
890,34
16,07
23,24
40,12
53,71
66,84
91,04
28,60
40,90
64,60
91,77
112,61
151,46
26,79
38,73
66,86
89,51
111,40
151,73
47,67
68,17
107,66
152,96
187,69
252,43
34,68
49,84
78,39
110,83
135,14
177,77
53,51
75,87
117,64
163,82
197,64
253,67
84,14
121,64
209,99
281,14
349,89
476,54
149,72
214,09
338,14
480,40
589,49
792,82
106,36
152,85
240,38
339,87
414,42
545,17
164,09
232,67
360,76
502,38
606,09
777,94
15,19
21,81
37,44
49,82
61,63
83,60
27,53
39,31
62,03
87,99
107,82
144,34
25,32
36,36
62,40
83,03
102,71
139,34
45,89
65,52
103,38
146,65
179,69
240,56
34,50
49,25
77,00
108,19
131,13
171,83
53,42
75,63
117,15
162,90
196,24
250,71
79,52
114,18
195,99
260,76
322,59
437,62
144,13
205,77
324,69
460,60
564,37
755,53
105,80
151,02
236,14
331,79
402,15
526,93
163,82
231,92
359,26
499,55
601,79
768,85
14,30
20,38
34,75
45,90
56,38
76,12
26,36
37,57
59,22
83,86
102,58
136,59
23,84
33,97
57,92
76,50
93,96
126,87
43,94
62,62
98,70
139,77
170,97
227,64
34,10
48,29
75,01
104,63
125,92
164,21
52,88
74,72
115,63
160,50
193,03
245,28
74,87
106,68
181,91
240,26
295,11
398,45
137,99
196,66
309,98
438,97
536,97
714,97
104,56
148,10
230,04
320,86
386,15
503,57
162,15
229,15
354,59
492,21
591,95
752,20
13,15
18,75
32,22
42,56
52,27
69,90
25,12
35,86
56,43
80,04
98,07
129,93
21,92
31,24
53,70
70,93
87,12
116,51
41,87
59,77
94,05
133,41
163,45
216,55
32,83
46,51
72,82
101,57
122,23
157,88
51,95
73,54
113,60
157,95
190,27
240,57
68,86
98,13
168,66
222,76
273,62
365,91
131,50
187,72
295,38
418,99
513,36
680,12
100,69
142,62
223,31
311,47
374,84
484,18
159,32
225,53
348,38
484,39
583,49
737,74
12,00
17,10
29,67
39,19
48,14
63,65
23,78
34,01
53,41
75,91
93,18
122,73
20,00
28,50
49,46
65,32
80,23
106,08
39,63
56,69
89,02
126,52
155,30
204,55
31,29
44,32
70,06
97,71
117,59
150,17
50,58
71,74
110,60
154,08
185,95
233,74
62,81
89,52
155,34
205,15
251,99
333,18
124,48
178,05
279,59
397,36
487,77
642,45
95,94
135,92
214,85
299,65
360,61
460,53
155,12
220,02
339,18
472,50
570,25
716,80
11,30
16,06
27,59
36,35
44,55
58,62
22,70
32,41
51,00
72,36
88,67
116,69
18,83
26,77
45,98
60,59
74,25
97,70
37,83
54,02
85,00
120,59
147,78
194,48
30,71
43,39
67,90
94,48
113,44
144,17
49,56
70,17
108,39
150,74
181,62
228,10
59,15
84,08
144,42
190,29
233,19
306,84
118,82
169,66
266,96
378,75
464,15
610,81
94,18
133,08
208,23
289,74
347,88
442,12
151,98
215,19
332,40
462,27
556,96
699,49
10,59
15,02
25,49
33,50
40,94
53,55
21,55
30,71
48,43
68,57
83,87
110,26
17,66
25,03
42,49
55,83
68,23
89,26
35,91
51,18
80,71
114,29
139,78
183,76
30,02
42,29
65,40
90,75
108,67
137,31
48,29
68,23
105,65
146,63
176,32
221,22
55,46
78,61
133,44
175,34
214,29
280,34
112,80
160,73
253,50
358,94
439,01
577,15
92,06
129,70
200,56
278,31
333,25
421,09
148,09
209,25
323,99
449,67
540,71
678,40
(1) Pressure change required to move the valve shutter from “start to open”
position to rated opening position
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
35
R134a
TABLE 3B: Refrigerant Flow Capacity of condensing pressure regulators 3340 [kW]. Hot gas line
Catalogue
Number
Condensing
pressure
change [bar] (1)
1,5
3340/4
3340/M12S
3340/4S
3
1,5
3340/5
3340/5S
3
1,5
3340/7S
3
1,5
3340/9S
3340/M28S
3
1,5
3340/11S
3
Condensing temperature [°C]
Pressure drop
across regulator
[bar]
10
15
20
25
30
35
40
45
50
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
2,47
3,47
5,88
7,68
9,34
11,86
4,50
6,35
9,99
14,01
16,98
21,72
4,11
5,79
9,80
12,81
15,56
19,76
7,50
10,58
16,65
23,35
28,30
36,20
5,60
7,84
12,10
16,69
19,87
24,37
8,72
12,21
18,86
25,94
30,90
37,73
12,90
18,18
30,79
40,23
48,88
62,07
23,54
33,23
52,29
73,34
88,88
113,70
17,17
24,05
37,10
51,18
60,93
74,74
26,76
37,45
57,85
79,55
94,77
115,70
2,46
3,46
5,87
7,66
9,31
11,82
4,37
6,17
9,71
13,63
16,51
21,12
4,10
5,77
9,78
12,77
15,52
19,71
7,29
10,29
16,19
22,71
27,52
35,21
5,30
7,43
11,46
15,81
18,82
23,09
8,18
11,45
17,69
24,32
28,98
35,38
12,87
18,13
30,70
40,11
48,73
61,89
22,89
32,32
50,85
71,33
86,43
110,57
16,26
22,78
35,14
48,48
57,72
70,80
25,09
35,12
54,25
74,59
88,87
108,50
2,47
3,47
5,88
7,68
9,34
11,86
4,50
6,35
9,99
14,01
16,98
21,72
4,11
5,79
9,80
12,81
15,56
19,76
7,50
10,58
16,65
23,35
28,30
36,20
5,60
7,84
12,10
16,69
19,87
24,37
8,72
12,21
18,86
25,94
30,90
37,73
12,90
18,18
30,79
40,23
48,88
62,07
23,54
33,23
52,29
73,34
88,88
113,70
17,17
24,05
37,10
51,18
60,93
74,74
26,76
37,45
57,85
79,55
94,77
115,70
2,47
3,48
5,90
7,71
9,37
11,89
4,62
6,52
10,26
14,40
17,45
22,32
4,12
5,81
9,83
12,85
15,61
19,82
7,70
10,87
17,11
23,99
29,08
37,20
5,89
8,26
12,74
17,57
20,92
25,66
9,27
12,97
20,04
27,55
32,83
40,08
12,94
18,24
30,88
40,35
49,02
62,26
24,19
34,14
53,72
75,36
91,32
116,82
18,07
25,32
39,06
53,88
64,14
78,68
28,42
39,78
61,45
84,50
100,67
122,91
2,48
3,49
5,92
7,73
9,39
11,93
4,74
6,70
10,54
14,78
17,91
22,91
4,13
5,82
9,86
12,88
15,65
19,88
7,91
11,16
17,56
24,64
29,85
38,19
6,19
8,67
13,37
18,45
21,96
26,94
9,81
13,73
21,21
29,17
34,75
42,43
12,98
18,29
30,98
40,46
49,17
62,44
24,83
35,06
55,16
77,38
93,76
119,95
18,98
26,58
41,01
56,58
67,36
82,62
30,09
42,12
65,06
89,45
106,57
130,11
2,49
3,50
5,93
7,75
9,42
11,96
4,87
6,87
10,81
15,17
18,38
23,51
4,15
5,84
9,89
12,92
15,70
19,94
8,11
11,45
18,02
25,28
30,63
39,19
6,48
9,08
14,01
19,33
23,01
28,23
10,35
14,49
22,39
30,78
36,68
44,78
13,02
18,34
31,07
40,58
49,31
62,63
25,48
35,97
56,60
79,39
96,21
123,07
19,88
27,85
42,97
59,28
70,57
86,57
31,75
44,45
68,66
94,41
112,47
137,32
2,49
3,51
5,95
7,78
9,45
12,00
4,99
7,05
11,09
15,55
18,85
24,11
4,16
5,86
9,92
12,96
15,75
20,00
8,32
11,74
18,48
25,92
31,41
40,18
6,8
9,5
14,6
20,2
24,1
29,5
10,9
15,3
23,6
32,4
38,6
47,1
13,1
18,4
31,2
40,7
49,5
62,8
26,1
36,9
58,0
81,4
98,6
126,2
20,8
29,1
44,9
62,0
73,8
90,5
33,4
46,8
72,3
99,4
118,4
144,5
2,50
3,53
5,97
7,80
9,48
12,03
5,12
7,22
11,37
15,95
19,32
24,72
4,17
5,88
9,95
13,00
15,79
20,06
8,53
12,04
18,95
26,58
32,21
41,20
7,09
9,93
15,32
21,13
25,15
30,86
11,47
16,05
24,80
34,10
40,63
49,60
13,10
18,45
31,25
40,82
49,60
63,00
26,79
37,82
59,51
83,48
101,15
129,40
21,74
30,45
46,97
64,80
77,14
94,63
35,17
49,23
76,05
104,57
124,59
152,11
2,51
3,54
5,99
7,82
9,50
12,07
5,25
7,41
11,66
16,35
19,81
25,35
4,18
5,89
9,98
13,04
15,84
20,12
8,75
12,35
19,43
27,25
33,02
42,25
7,41
10,38
16,01
22,09
26,30
32,26
12,07
16,90
26,10
35,89
42,76
52,20
13,13
18,51
31,34
40,94
49,75
63,18
27,47
38,78
61,02
85,59
103,72
132,69
22,73
31,83
49,11
67,75
80,65
98,94
37,02
51,82
80,04
110,06
131,12
160,09
(1) Pressure change required to move the valve shutter from “start to open”
position to rated opening position
36
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R134a
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
TABLE 3C: Correction factor for evaporator temperature different from nominal value
Evaporator temperature [°C]
-40
-30
-20
-15
-10
-5
0
4,4
10
1,2
1,15
1,1
1,08
1,06
1,04
1,02
1
0,98
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
37
R22
TABLE 4A: Refrigerant Flow Capacity of condensing pressure regulators 3340 [kW]. Liquid line
Catalogue
Number
Condensing
pressure
change [bar] (1)
1,5
3340/4
3340/M12S
3340/4S
3
1,5
3340/5
3340/5S
3
1,5
3340/7S
3
1,5
3340/9S
3340/M28S
3
1,5
3340/11S
3
Condensing temperature [°C]
Pressure drop
across regulator
[bar]
10
15
20
25
30
35
40
45
50
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
12,67
18,42
31,25
45,19
56,48
77,58
25,93
37,08
58,80
84,03
103,26
137,60
21,17
30,78
52,22
75,52
94,37
129,63
44,32
63,37
100,49
143,60
176,46
235,12
29,23
42,10
70,67
100,94
125,22
167,69
50,98
72,37
113,17
158,86
194,11
251,39
66,48
96,67
164,01
237,19
296,40
407,13
139,19
199,03
315,63
451,00
554,21
738,46
89,64
129,09
216,72
309,54
384,02
514,24
156,34
221,93
347,07
487,16
595,28
770,93
12,16
17,63
29,40
42,42
52,88
71,84
24,97
35,69
56,44
80,62
99,04
131,78
20,33
29,47
49,15
70,90
88,39
120,09
42,79
61,16
96,73
138,17
169,74
225,84
29,42
42,22
69,56
99,08
122,60
162,21
50,83
72,12
112,45
157,79
192,75
249,24
63,86
92,55
154,37
222,69
277,62
377,17
134,39
192,10
303,79
433,96
533,10
709,30
90,23
129,47
213,31
303,85
375,98
497,45
155,87
221,17
344,86
483,89
591,09
764,32
11,66
16,84
27,57
39,65
49,30
66,13
24,10
34,43
54,28
77,51
95,19
126,46
19,38
27,99
45,81
65,89
81,93
109,90
39,06
55,80
87,99
125,64
154,29
204,97
26,65
38,10
61,59
87,48
107,96
141,04
44,73
63,45
98,63
138,35
168,94
218,11
60,88
87,91
143,86
206,95
257,31
345,16
122,67
175,27
276,34
394,60
484,59
643,75
81,72
116,84
188,88
268,28
331,08
432,51
137,18
194,57
302,47
424,27
518,09
668,88
11,16
16,05
25,72
36,88
45,70
60,39
23,14
33,04
51,92
74,11
90,98
120,64
18,55
26,68
42,74
61,28
75,95
100,36
37,53
53,60
84,22
120,21
147,57
195,68
26,84
38,22
60,48
85,63
105,34
135,56
44,58
63,20
97,91
137,28
167,57
215,96
58,26
83,79
134,22
192,45
238,53
315,20
117,87
168,34
264,51
377,56
463,48
614,60
82,31
117,22
185,47
262,59
323,03
415,72
136,71
193,82
300,26
421,00
513,90
662,27
10,66
15,26
23,86
34,08
42,08
54,62
22,09
31,53
49,35
70,41
86,39
114,32
17,71
25,36
39,65
56,63
69,93
90,76
35,86
51,19
80,11
114,29
140,24
185,57
26,90
38,14
58,89
83,06
101,80
128,68
44,04
62,40
96,28
134,94
164,64
211,73
55,62
79,65
124,52
177,86
219,63
285,06
112,62
160,76
251,59
358,96
440,45
582,83
82,48
116,95
180,60
254,72
312,20
394,62
135,04
191,36
295,27
413,81
504,90
649,30
9,94
14,18
22,30
31,71
38,99
50,99
21,04
30,02
47,05
67,08
82,26
108,65
16,53
23,56
37,06
52,70
64,78
84,73
34,18
48,76
76,42
108,96
133,61
176,49
26,28
37,09
57,64
80,92
98,74
125,78
43,28
61,29
94,70
132,64
161,73
207,62
51,90
73,99
116,40
165,51
203,47
266,12
107,35
153,14
240,01
342,21
419,64
554,31
80,59
113,74
176,77
248,17
302,81
385,71
132,72
187,94
290,42
406,75
495,97
636,70
9,23
13,08
20,74
29,33
35,87
47,34
19,91
28,38
44,56
63,49
77,79
102,55
15,34
21,74
34,46
48,74
59,61
78,67
32,37
46,14
72,43
103,19
126,44
166,68
25,47
35,76
55,99
78,19
94,90
121,98
42,15
59,64
92,32
129,20
157,43
201,68
48,16
68,29
108,24
153,08
187,20
247,07
101,65
144,90
227,47
324,09
397,13
523,49
78,12
109,67
171,70
239,77
291,04
374,07
129,26
182,91
283,11
396,22
482,77
618,48
8,51
12,06
19,24
27,21
33,27
43,76
19,02
27,06
42,46
60,39
73,86
98,47
14,13
20,04
31,98
45,22
55,29
72,72
30,91
43,98
69,02
98,15
120,05
160,05
24,47
34,36
54,16
75,62
91,78
117,54
41,32
58,36
90,30
126,14
153,41
198,77
44,39
62,93
100,44
142,03
173,66
228,39
97,08
138,13
216,77
308,26
377,04
502,68
75,06
105,36
166,09
231,91
281,45
360,47
126,71
178,97
276,91
386,82
470,46
609,57
7,78
11,03
17,74
25,08
30,66
40,16
18,06
25,65
40,23
57,09
69,67
94,12
12,93
18,32
29,48
41,68
50,96
66,74
29,36
41,68
65,39
92,79
113,25
152,98
23,33
32,75
52,05
72,66
88,17
112,45
40,29
56,77
87,81
122,40
148,54
195,01
40,60
57,55
92,60
130,91
160,04
209,60
92,22
130,92
205,37
291,42
355,67
480,47
71,55
100,43
159,62
222,83
270,38
344,86
123,54
174,10
269,29
375,35
455,52
598,03
(1) Pressure change required to move the valve shutter from “start to open”
position to rated opening position
38
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R22
TABLE 4B: Refrigerant Flow Capacity of condensing pressure regulators 3340 [kW]. Hot gas line
Catalogue
Number
Condensing
pressure
change [bar] (1)
1,5
3340/4
3340/M12S
3340/4S
3
1,5
3340/5
3340/5S
3
1,5
3340/7S
3
1,5
3340/9S
3340/M28S
3
1,5
3340/11S
3
Condensing temperature [°C]
Pressure drop
across regulator
[bar]
10
15
20
25
30
35
40
45
50
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
2,23
3,15
4,97
7,00
8,52
10,94
4,36
6,15
9,70
13,68
16,60
21,39
3,72
5,25
8,29
11,67
14,20
18,24
7,26
10,25
16,16
22,80
27,67
35,64
5,70
7,97
12,42
17,26
20,85
26,09
9,13
12,80
19,89
27,57
33,27
41,65
11,69
16,49
26,03
36,64
44,60
57,28
22,81
32,19
50,76
71,62
86,92
111,95
17,48
24,43
38,08
52,93
63,95
79,99
28,01
39,25
61,01
84,56
102,04
127,73
2,23
3,14
4,96
6,98
8,49
10,91
4,24
5,98
9,43
13,31
16,15
20,80
3,71
5,24
8,26
11,63
14,16
18,18
7,06
9,97
15,72
22,18
26,91
34,66
5,40
7,55
11,76
16,35
19,75
24,71
8,56
12,00
18,66
25,86
31,20
39,06
11,65
16,44
25,95
36,53
44,46
57,11
22,18
31,31
49,36
69,65
84,53
108,87
16,56
23,14
36,07
50,14
60,58
75,78
26,26
36,80
57,21
79,29
95,69
119,77
2,23
3,15
4,97
7,00
8,52
10,94
4,36
6,15
9,70
13,68
16,60
21,39
3,72
5,25
8,29
11,67
14,20
18,24
7,26
10,25
16,16
22,80
27,67
35,64
5,70
7,97
12,42
17,26
20,85
26,09
9,13
12,80
19,89
27,57
33,27
41,65
11,69
16,49
26,03
36,64
44,60
57,28
22,81
32,19
50,76
71,62
86,92
111,95
17,48
24,43
38,08
52,93
63,95
79,99
28,01
39,25
61,01
84,56
102,04
127,73
2,24
3,16
4,99
7,02
8,54
10,98
4,48
6,32
9,96
14,06
17,06
21,97
3,73
5,27
8,31
11,70
14,24
18,29
7,46
10,53
16,61
23,43
28,43
36,62
6,00
8,39
13,07
18,17
21,95
27,46
9,70
13,59
21,13
29,29
35,35
44,24
11,72
16,54
26,10
36,75
44,73
57,45
23,43
33,08
52,15
73,59
89,31
115,03
18,41
25,72
40,09
55,72
67,32
84,21
29,75
41,69
64,81
89,82
108,39
135,68
2,25
3,17
5,00
7,04
8,57
11,01
4,60
6,49
10,23
14,43
17,52
22,56
3,74
5,28
8,34
11,73
14,28
18,35
7,66
10,81
17,05
24,06
29,20
37,60
6,30
8,81
13,73
19,08
23,05
28,84
10,27
14,39
22,37
31,01
37,42
46,84
11,76
16,59
26,18
36,86
44,86
57,62
24,06
33,96
53,55
75,56
91,69
118,10
19,33
27,01
42,10
58,51
70,69
88,43
31,50
44,13
68,61
95,09
114,75
143,64
2,25
3,18
5,02
7,06
8,60
11,04
4,72
6,66
10,50
14,81
17,97
23,15
3,75
5,30
8,36
11,77
14,33
18,40
7,86
11,10
17,49
24,68
29,96
38,58
6,60
9,23
14,38
19,99
24,15
30,21
10,84
15,19
23,61
32,72
39,49
49,43
11,79
16,64
26,26
36,96
44,99
57,79
24,69
34,85
54,94
77,52
94,08
121,18
20,25
28,29
44,11
61,30
74,06
92,65
33,24
46,58
72,41
100,35
121,10
151,59
2,26
3,19
5,03
7,08
8,62
11,07
4,84
6,83
10,76
15,19
18,43
23,74
3,77
5,31
8,39
11,80
14,37
18,46
8,06
11,38
17,94
25,31
30,72
39,56
6,90
9,65
15,04
20,90
25,25
31,59
11,41
15,99
24,85
34,44
41,56
52,02
11,8
16,7
26,3
37,1
45,1
58,0
25,3
35,7
56,3
79,5
96,5
124,3
21,2
29,6
46,1
64,1
77,4
96,9
35,0
49,0
76,2
105,6
127,5
159,5
2,27
3,20
5,05
7,10
8,65
11,11
4,96
7,00
11,04
15,57
18,90
24,34
3,78
5,33
8,41
11,84
14,41
18,51
8,26
11,67
18,39
25,95
31,50
40,57
7,22
10,09
15,72
21,85
26,40
33,02
12,01
16,82
26,15
36,25
43,74
54,75
11,86
16,74
26,41
37,18
45,26
58,13
25,96
36,64
57,77
81,51
98,92
127,41
22,14
30,93
48,21
67,01
80,96
101,28
36,82
51,59
80,20
111,16
134,14
167,91
2,27
3,21
5,06
7,12
8,67
11,14
5,08
7,18
11,32
15,97
19,38
24,96
3,79
5,35
8,43
11,87
14,45
18,56
8,47
11,96
18,86
26,61
32,30
41,60
7,55
10,54
16,44
22,85
27,60
34,53
12,64
17,71
27,53
38,15
46,04
57,63
11,90
16,79
26,49
37,29
45,39
58,31
26,62
37,57
59,24
83,58
101,43
130,65
23,14
32,34
50,41
70,06
84,65
105,89
38,75
54,30
84,41
116,99
141,18
176,72
(1) Pressure change required to move the valve shutter from “start to open”
position to rated opening position
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
39
R22
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
TABLE 4C: Correction factor for evaporator temperature different from nominal value
Evaporator temperature [°C]
40
-40
-30
-20
-15
-10
-5
0
4,4
10
1,12
1,08
1,05
1,04
1,03
1,02
1,01
1
0,99
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R404A / R507
TABLE 5A: Refrigerant Flow Capacity of condensing pressure regulators 3340 [kW]. Liquid line
Catalogue
Number
Condensing
pressure
change [bar] (1)
1,5
3340/4
3340/M12S
3340/4S
3
1,5
3340/5
3340/5S
3
1,5
3340/7S
3
1,5
3340/9S
3340/M28S
3
1,5
3340/11S
3
Condensing temperature [°C]
Pressure drop
across regulator
[bar]
10
15
20
25
30
35
40
45
50
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
11,30
16,16
26,31
37,42
46,04
62,48
22,15
31,76
52,00
74,00
91,29
120,77
18,83
26,93
43,85
62,36
76,73
104,14
36,91
52,94
86,67
123,33
152,15
201,29
28,72
40,68
65,85
91,91
111,82
149,30
45,07
64,02
104,06
145,90
177,91
230,21
59,14
84,57
137,72
195,86
241,00
327,08
115,93
166,26
272,20
387,36
477,86
632,19
88,08
124,76
201,93
281,85
342,92
457,86
138,21
196,34
319,11
447,42
545,59
705,98
10,61
15,20
24,64
35,08
43,21
58,40
21,52
30,83
50,22
71,40
88,00
116,30
17,69
25,33
41,07
58,46
72,02
97,33
35,86
51,38
83,70
119,00
146,67
193,83
28,08
39,83
64,14
89,64
109,20
145,06
45,08
63,96
103,33
144,72
176,28
227,79
55,56
79,54
128,98
183,62
226,19
305,69
112,64
161,37
262,88
373,75
460,66
608,76
86,12
122,15
196,69
274,89
334,88
444,86
138,24
196,15
316,88
443,80
540,59
698,57
9,87
14,15
22,83
32,55
40,14
53,99
19,77
28,30
45,85
65,12
80,19
105,84
16,45
23,59
38,05
54,25
66,90
89,98
32,95
47,16
76,41
108,53
133,64
176,39
27,66
39,28
62,93
88,06
107,41
142,00
45,42
64,37
103,44
144,73
176,13
227,32
51,68
74,08
119,52
170,37
210,12
282,61
103,50
148,12
240,00
340,88
419,74
554,00
84,82
120,45
192,98
270,05
329,39
435,46
139,29
197,41
317,22
443,84
540,12
697,12
9,19
13,19
21,16
30,21
37,31
49,90
19,14
27,36
44,07
62,52
76,90
101,36
15,32
21,99
35,27
50,35
62,19
83,17
31,91
45,60
73,45
104,20
128,17
168,93
27,02
38,43
61,22
85,79
104,79
137,76
45,43
64,31
102,71
143,55
174,50
224,90
48,10
69,05
110,78
158,14
195,31
261,21
100,21
143,23
230,68
327,28
402,54
530,56
82,87
117,85
187,74
263,09
321,35
422,46
139,32
197,22
314,99
440,22
535,12
689,70
8,50
12,23
19,48
27,86
34,46
45,79
18,45
26,33
42,12
59,68
73,31
96,47
14,17
20,38
32,47
46,43
57,44
76,32
30,75
43,89
70,20
99,46
122,18
160,78
26,18
37,29
59,00
82,83
101,34
132,34
45,11
63,77
101,15
141,17
171,39
220,54
44,51
64,00
101,98
145,83
180,40
239,69
96,57
137,85
220,48
312,39
383,74
504,98
80,27
114,35
180,95
254,00
310,77
405,85
138,34
195,56
310,18
432,94
525,59
676,33
8,06
11,59
18,14
25,94
32,08
42,63
17,64
25,21
40,07
56,86
69,94
92,37
13,44
19,31
30,23
43,23
53,47
71,05
29,40
42,02
66,79
94,76
116,57
153,95
25,92
36,92
57,39
80,55
98,54
128,71
44,34
62,76
98,91
138,25
168,07
217,05
42,20
60,65
94,96
135,76
167,92
223,15
92,34
131,99
209,77
297,63
366,10
483,51
79,50
113,21
176,00
247,02
302,17
394,70
135,96
192,46
303,34
423,97
515,41
665,63
7,62
10,94
16,79
24,00
29,68
39,45
16,76
24,00
37,86
53,81
66,29
87,92
12,70
18,24
27,99
40,00
49,47
65,75
27,94
40,00
63,10
89,68
110,49
146,53
25,54
36,35
55,38
77,71
95,04
124,17
43,22
61,27
95,86
134,20
163,40
211,92
39,88
57,28
87,89
125,64
155,37
206,51
87,75
125,62
198,19
281,66
347,01
460,21
78,32
111,46
169,83
238,30
291,45
380,77
132,53
187,89
293,98
411,55
501,11
649,87
6,95
9,95
15,55
22,17
27,35
36,42
15,81
22,63
35,75
50,79
62,55
82,97
11,58
16,59
25,92
36,95
45,58
60,71
26,35
37,71
59,59
84,65
104,25
138,28
24,27
34,47
53,46
74,83
91,29
119,50
41,84
59,30
92,91
130,02
158,25
205,27
36,36
52,11
81,40
116,05
143,16
190,66
82,77
118,45
187,15
265,86
327,41
434,30
74,44
105,70
163,96
229,47
279,94
366,48
128,31
181,84
284,94
398,73
485,29
629,48
6,27
8,96
14,30
20,33
25,00
33,38
14,80
21,17
33,51
47,58
58,57
77,71
10,45
14,93
23,84
33,88
41,67
55,63
24,67
35,29
55,86
79,31
97,62
129,52
22,84
32,34
51,26
71,53
87,00
114,16
40,20
56,95
89,39
125,03
152,10
197,33
32,82
46,90
74,87
106,41
130,87
174,72
77,49
110,83
175,43
249,08
306,60
406,78
70,05
99,17
157,20
219,34
266,79
350,09
123,29
174,64
274,14
383,43
466,44
605,16
(1) Pressure change required to move the valve shutter from “start to open”
position to rated opening position
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
41
R404A / R507
TABLE 5B: Refrigerant Flow Capacity of condensing pressure regulators 3340 [kW]. Hot gas line
Catalogue
Number
Condensing
pressure
change [bar] (1)
1,5
3340/4
3340/M12S
3340/4S
3
1,5
3340/5
3340/5S
3
1,5
3340/7S
3
1,5
3340/9S
3340/M28S
3
1,5
3340/11S
3
Condensing temperature [°C]
Pressure drop
across regulator
[bar]
10
15
20
25
30
35
40
45
50
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
2,08
2,94
4,64
6,54
7,97
10,24
4,26
6,04
9,52
13,40
16,35
21,01
3,46
4,90
7,73
10,89
13,29
17,06
7,10
10,06
15,87
22,33
27,25
35,01
5,80
8,14
12,74
17,63
21,27
26,84
9,51
13,36
20,89
28,96
34,93
43,88
10,87
15,40
24,27
34,21
41,73
53,58
22,29
31,60
49,83
70,14
85,60
109,97
17,79
24,97
39,07
54,06
65,23
82,32
29,18
40,97
64,06
88,82
107,12
134,58
2,07
2,93
4,62
6,52
7,95
10,21
4,14
5,87
9,26
13,03
15,90
20,43
3,45
4,89
7,70
10,86
13,25
17,01
6,90
9,79
15,43
21,72
26,51
34,05
5,49
7,71
12,07
16,70
20,15
25,43
8,92
12,53
19,59
27,16
32,76
41,15
10,84
15,36
24,19
34,11
41,61
53,42
21,68
30,74
48,46
68,22
83,25
106,95
16,85
23,66
37,01
51,21
61,79
77,98
27,36
38,41
60,07
83,29
100,45
126,20
2,08
2,94
4,64
6,54
7,97
10,24
4,26
6,04
9,52
13,40
16,35
21,01
3,46
4,90
7,73
10,89
13,29
17,06
7,10
10,06
15,87
22,33
27,25
35,01
5,80
8,14
12,74
17,63
21,27
26,84
9,51
13,36
20,89
28,96
34,93
43,88
10,87
15,40
24,27
34,21
41,73
53,58
22,29
31,60
49,83
70,14
85,60
109,97
17,79
24,97
39,07
54,06
65,23
82,32
29,18
40,97
64,06
88,82
107,12
134,58
2,08
2,95
4,65
6,55
8,00
10,27
4,38
6,20
9,78
13,77
16,80
21,59
3,47
4,92
7,75
10,92
13,33
17,11
7,29
10,34
16,30
22,95
28,00
35,98
6,11
8,57
13,41
18,56
22,39
28,26
10,11
14,19
22,19
30,77
37,11
46,62
10,90
15,45
24,34
34,31
41,86
53,74
22,90
32,47
51,20
72,07
87,95
113,00
18,73
26,29
41,13
56,91
68,67
86,66
30,99
43,52
68,05
94,35
113,80
142,96
2,09
2,96
4,66
6,57
8,02
10,30
4,49
6,37
10,04
14,14
17,25
22,16
3,48
4,93
7,77
10,96
13,37
17,16
7,49
10,62
16,74
23,56
28,75
36,94
6,41
9,00
14,08
19,49
23,51
29,67
10,70
15,02
23,49
32,57
39,28
49,35
10,94
15,50
24,41
34,41
41,98
53,90
23,52
33,34
52,57
74,00
90,31
116,02
19,66
27,61
43,19
59,77
72,10
91,00
32,81
46,07
72,04
99,88
120,47
151,34
2,10
2,97
4,68
6,59
8,04
10,33
4,61
6,54
10,31
14,51
17,70
22,74
3,49
4,95
7,80
10,99
13,41
17,21
7,68
10,89
17,18
24,18
29,50
37,90
6,72
9,43
14,75
20,42
24,63
31,09
11,29
15,85
24,79
34,37
41,46
52,08
10,97
15,54
24,48
34,52
42,10
54,06
24,13
34,21
53,94
75,93
92,66
119,04
20,60
28,92
45,25
62,62
75,54
95,34
34,63
48,62
76,03
105,41
127,14
159,72
2,10
2,98
4,69
6,61
8,07
10,36
4,73
6,70
10,57
14,87
18,15
23,32
3,50
4,96
7,82
11,02
13,45
17,26
7,88
11,17
17,61
24,79
30,25
38,86
7,02
9,86
15,43
21,35
25,76
32,50
11,88
16,69
26,09
36,18
43,63
54,82
11,0
15,6
24,6
34,6
42,2
54,2
24,7
35,1
55,3
77,9
95,0
122,1
21,5
30,2
47,3
65,5
79,0
99,7
36,4
51,2
80,0
110,9
133,8
168,1
2,11
2,99
4,70
6,63
8,09
10,39
4,85
6,87
10,84
15,25
18,61
23,91
3,51
4,98
7,84
11,05
13,49
17,31
8,08
11,45
18,06
25,42
31,02
39,85
7,34
10,31
16,13
22,32
26,93
33,98
12,51
17,56
27,46
38,08
45,92
57,69
11,03
15,63
24,63
34,72
42,35
54,38
25,37
35,97
56,72
79,83
97,42
125,16
22,52
31,62
49,46
68,45
82,58
104,22
38,36
53,85
84,21
116,77
140,83
176,92
2,11
3,00
4,72
6,65
8,11
10,42
4,97
7,05
11,11
15,64
19,08
24,52
3,52
4,99
7,86
11,09
13,52
17,37
8,28
11,74
18,52
26,06
31,81
40,86
7,68
10,78
16,86
23,34
28,15
35,53
13,16
18,48
28,90
40,07
48,33
60,72
11,07
15,68
24,70
34,82
42,48
54,54
26,02
36,88
58,16
81,86
99,90
128,34
23,55
33,06
51,71
71,56
86,34
108,96
40,37
56,68
88,63
122,89
148,22
186,20
(1) Pressure change required to move the valve shutter from “start to open”
position to rated opening position
42
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R404A / R507
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
TABLE 5C: Correction factor for evaporator temperature different from nominal value
Evaporator temperature [°C]
-40
-30
-20
-15
-10
-5
0
4,4
10
1,26
1,19
1,13
1,1
1,07
1,05
1,02
1
0,98
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
43
R407C
TABLE 6A: Refrigerant Flow Capacity of condensing pressure regulators 3340 [kW]. Liquid line
Catalogue
Number
Condensing
pressure
change [bar] (1)
1,5
3340/4
3340/M12S
3340/4S
3
1,5
3340/5
3340/5S
3
1,5
3340/7S
3
1,5
3340/9S
3340/M28S
3
1,5
3340/11S
3
Condensing temperature [°C]
Pressure drop
across regulator
[bar]
10
15
20
25
30
35
40
45
50
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
16,01
23,06
36,67
52,65
65,41
90,55
30,94
44,23
70,70
100,68
124,02
164,06
26,61
38,33
60,96
87,52
108,73
150,53
50,28
71,87
114,93
163,66
201,60
266,69
36,90
52,80
83,13
117,75
144,15
197,40
59,19
83,85
132,79
185,23
226,03
294,35
83,58
120,39
191,47
274,88
341,50
472,78
157,91
225,74
360,98
514,01
633,16
837,61
113,17
161,92
254,94
361,10
442,07
605,37
181,50
257,13
407,23
568,04
693,17
902,68
15,08
21,75
34,37
49,38
61,41
83,88
29,86
42,71
67,89
96,74
119,26
157,56
25,07
36,14
57,11
82,06
102,04
139,38
48,39
69,23
110,04
156,81
193,30
255,38
36,21
51,86
81,03
114,91
140,83
189,76
58,72
83,26
130,95
182,82
223,29
290,35
78,73
113,49
179,36
257,73
320,49
437,77
151,99
217,43
345,59
492,49
607,11
802,10
111,05
159,05
248,51
352,38
431,88
581,93
180,08
255,32
401,59
560,66
684,76
890,41
14,08
20,31
31,87
45,84
57,07
76,76
27,24
38,99
61,59
87,84
108,37
142,98
23,53
33,95
53,27
76,63
95,39
128,31
46,68
66,82
105,55
150,54
185,72
245,04
35,78
51,29
79,57
112,95
138,57
183,85
58,74
83,35
130,28
182,03
222,49
288,93
73,90
106,64
167,32
240,69
299,61
402,98
146,60
209,88
331,52
472,81
583,30
769,62
109,71
157,30
244,00
346,37
424,95
563,82
180,14
255,60
399,52
558,22
682,31
886,05
13,15
19,00
29,56
42,58
53,06
70,09
26,16
37,48
58,78
83,90
103,61
136,49
21,98
31,76
49,42
71,18
88,70
117,16
44,79
64,18
100,66
143,69
177,42
233,74
35,08
50,36
77,47
110,10
135,24
176,21
58,27
82,76
128,44
179,62
219,75
284,93
69,05
99,74
155,21
223,54
278,60
367,97
140,68
201,57
316,13
451,28
557,24
734,11
107,59
154,43
237,57
337,65
414,75
540,38
178,71
253,79
393,88
550,84
673,90
873,78
12,22
17,68
27,24
39,29
49,04
63,38
24,97
35,82
55,71
79,62
98,41
129,42
20,43
29,55
45,54
65,68
81,97
105,95
42,74
61,29
95,34
136,24
168,41
221,47
34,13
49,06
74,74
106,38
130,85
166,83
57,33
81,49
125,43
175,60
215,06
278,35
64,16
92,81
143,02
206,29
257,46
332,75
134,22
192,51
299,43
427,90
528,93
695,57
104,68
150,44
229,20
326,23
401,29
511,62
175,80
249,90
384,65
538,52
659,52
853,60
11,52
16,52
25,65
36,67
45,37
59,02
23,90
34,21
53,36
76,11
93,92
123,12
19,26
27,61
42,87
61,29
75,85
98,65
40,86
58,50
91,25
130,16
160,60
210,55
33,61
47,88
73,50
103,70
126,48
162,27
56,38
80,00
123,49
172,56
210,95
272,19
60,49
86,72
134,64
192,50
238,22
309,83
128,34
183,74
286,61
408,81
504,42
661,28
103,08
146,84
225,40
318,01
387,87
497,63
172,90
245,33
378,69
529,19
646,92
834,71
10,82
15,35
24,04
34,03
41,69
54,62
22,73
32,47
50,81
72,32
89,05
116,32
18,08
25,66
40,19
56,88
69,69
91,31
38,84
55,49
86,84
123,59
152,18
198,78
32,90
46,39
71,82
100,31
121,13
156,57
55,00
77,88
120,61
168,18
205,16
263,77
56,79
80,60
126,21
178,63
218,86
286,77
121,99
174,27
272,73
388,18
477,95
624,33
100,89
142,27
220,25
307,62
371,48
480,15
168,68
238,83
369,88
515,75
629,17
808,89
9,92
14,11
22,24
31,54
38,71
50,52
21,65
30,86
48,36
68,70
84,43
110,26
16,58
23,58
37,18
52,72
64,71
84,45
36,99
52,74
82,65
117,41
144,28
188,43
31,45
44,44
69,28
96,93
117,25
150,96
53,77
75,98
117,83
163,98
199,66
256,63
52,08
74,06
116,78
165,58
203,23
265,24
116,18
165,65
259,58
368,75
453,16
591,81
96,46
136,27
212,44
297,25
359,58
462,95
164,90
233,02
361,34
502,87
612,28
787,00
9,02
12,85
20,44
29,04
35,71
46,40
20,50
29,16
45,75
64,85
79,51
103,82
15,08
21,48
34,16
48,54
59,70
77,56
35,03
49,83
78,19
110,83
135,89
177,42
29,81
42,20
66,35
93,03
112,77
144,52
52,26
73,68
114,42
158,87
193,00
248,02
47,35
67,47
107,29
152,44
187,49
243,59
110,01
156,49
245,59
348,07
426,79
557,24
91,41
129,43
203,47
285,28
345,83
443,20
160,26
225,94
350,89
487,22
591,88
760,59
(1) Pressure change required to move the valve shutter from “start to open”
position to rated opening position
44
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
R407C
TABLE 6B: Refrigerant Flow Capacity of condensing pressure regulators 3340 [kW]. Hot gas line
Catalogue
Number
Condensing
pressure
change [bar] (1)
1,5
3340/4
3340/M12S
3340/4S
3
1,5
3340/5
3340/5S
3
1,5
3340/7S
3
1,5
3340/9S
3340/M28S
3
1,5
3340/11S
3
Condensing temperature [°C]
Pressure drop
across regulator
[bar]
10
15
20
25
30
35
40
45
50
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,7
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
0,07
0,14
0,31
0,65
1,03
1,68
2,33
3,29
5,20
7,33
8,94
11,43
4,55
6,45
10,17
14,34
17,49
22,37
3,88
5,49
8,67
12,21
14,90
19,05
7,59
10,74
16,95
23,89
29,15
37,28
5,91
8,29
12,94
18,00
21,65
27,30
9,55
13,40
20,91
28,89
34,92
43,96
12,20
17,24
27,22
38,36
46,81
59,83
23,84
33,74
53,22
75,04
91,54
117,09
18,11
25,44
39,69
55,20
66,39
83,71
29,30
41,09
64,14
88,60
107,08
134,80
2,32
3,28
5,18
7,31
8,92
11,40
4,43
6,27
9,89
13,94
17,01
21,75
3,87
5,47
8,64
12,18
14,86
18,99
7,38
10,45
16,48
23,24
28,35
36,26
5,59
7,86
12,26
17,05
20,51
25,86
8,96
12,57
19,61
27,09
32,74
41,22
12,16
17,19
27,13
38,25
46,67
59,65
23,19
32,82
51,76
72,98
89,03
113,87
17,16
24,10
37,60
52,29
62,89
79,29
27,47
38,53
60,15
83,08
100,41
126,41
2,33
3,29
5,20
7,33
8,94
11,43
4,55
6,45
10,17
14,34
17,49
22,37
3,88
5,49
8,67
12,21
14,90
19,05
7,59
10,74
16,95
23,89
29,15
37,28
5,91
8,29
12,94
18,00
21,65
27,30
9,55
13,40
20,91
28,89
34,92
43,96
12,20
17,24
27,22
38,36
46,81
59,83
23,84
33,74
53,22
75,04
91,54
117,09
18,11
25,44
39,69
55,20
66,39
83,71
29,30
41,09
64,14
88,60
107,08
134,80
2,34
3,30
5,21
7,35
8,97
11,46
4,68
6,62
10,45
14,73
17,97
22,98
3,90
5,51
8,69
12,25
14,95
19,11
7,80
11,04
17,41
24,55
29,95
38,30
6,22
8,73
13,62
18,95
22,79
28,73
10,15
14,23
22,22
30,69
37,09
46,69
12,24
17,30
27,30
38,47
46,95
60,01
24,50
34,67
54,68
77,11
94,06
120,31
19,07
26,78
41,78
58,11
69,89
88,12
31,12
43,65
68,13
94,12
113,75
143,19
2,34
3,31
5,23
7,37
8,99
11,50
4,81
6,80
10,73
15,12
18,45
23,60
3,91
5,52
8,72
12,29
14,99
19,16
8,01
11,33
17,88
25,21
30,75
39,33
6,53
9,17
14,31
19,90
23,93
30,17
10,74
15,07
23,52
32,49
39,27
49,43
12,27
17,35
27,38
38,59
47,08
60,18
25,15
35,60
56,15
79,17
96,57
123,52
20,02
28,12
43,87
61,02
73,39
92,53
32,95
46,21
72,13
99,63
120,42
151,59
2,35
3,32
5,25
7,39
9,02
11,53
4,93
6,98
11,01
15,52
18,93
24,21
3,92
5,54
8,74
12,32
15,04
19,22
8,22
11,63
18,34
25,86
31,55
40,35
6,84
9,61
14,99
20,85
25,07
31,61
11,34
15,90
24,82
34,29
41,44
52,17
12,31
17,40
27,46
38,70
47,22
60,36
25,81
36,52
57,61
81,23
99,09
126,74
20,98
29,46
45,97
63,93
76,89
96,95
34,77
48,77
76,12
105,15
127,08
159,98
2,36
3,33
5,26
7,42
9,05
11,57
5,06
7,15
11,29
15,91
19,41
24,83
3,93
5,56
8,77
12,36
15,08
19,28
8,43
11,92
18,81
26,52
32,35
41,38
7,15
10,04
15,67
21,80
26,21
33,05
11,93
16,74
26,12
36,09
43,61
54,91
12,3
17,4
27,5
38,8
47,4
60,5
26,5
37,5
59,1
83,3
101,6
130,0
21,9
30,8
48,1
66,8
80,4
101,4
36,6
51,3
80,1
110,7
133,8
168,4
2,37
3,34
5,28
7,44
9,07
11,60
5,18
7,34
11,57
16,32
19,90
25,46
3,94
5,57
8,79
12,40
15,12
19,33
8,64
12,23
19,29
27,19
33,17
42,43
7,48
10,50
16,38
22,79
27,41
34,56
12,56
17,62
27,50
37,98
45,90
57,79
12,38
17,50
27,62
38,93
47,50
60,72
27,14
38,40
60,57
85,41
104,19
133,26
22,93
32,20
50,25
69,89
84,05
105,98
38,52
54,02
84,32
116,47
140,77
177,21
2,37
3,35
5,29
7,46
9,10
11,63
5,32
7,52
11,87
16,73
20,41
26,10
3,95
5,59
8,82
12,43
15,17
19,39
8,86
12,54
19,78
27,88
34,01
43,51
7,82
10,98
17,13
23,83
28,66
36,13
13,22
18,54
28,94
39,97
48,31
60,82
12,42
17,55
27,70
39,05
47,64
60,90
27,83
39,38
62,11
87,58
106,83
136,64
23,97
33,67
52,53
73,07
87,88
110,80
40,54
56,86
88,74
122,59
148,16
186,51
(1) Pressure change required to move the valve shutter from “start to open”
position to rated opening position
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
45
R407C
Standard rating conditions according to AHRI Standard 770-2007
Condensing temperature
Liquid temperature
Subcooling 100 °F
98 °F
2 °R
(37,8 °C)
(36,7 °C)
(1,1 °K)
Evaporating temperature
Suction temperature
Superheating
40 °F
65 °F
25 °R
(4,4 °C)
(18,3 °C)
(13,9 °K)
Discharge temperature
150 °F
(65,6 °C)
TABLE 6C: Correction factor for evaporator temperature different from nominal value
Evaporator temperature [°C]
46
-40
-30
-20
-15
-10
-5
0
4,4
10
1,18
1,13
1,09
1,07
1,05
1,03
1,02
1
0,98
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
LIQUID RECEIVER PRESSUREREGULATORS
SERIES 3350
Approved by Underwriters Laboratories Inc.
by-passes hot gas from the compressor discharge to the
receiver thus raising liquid pressure in the receiver.
OPERATION
Receiver pressure regulators series 3350 adjust the flow of
hot gas according to changes of liquid receiver pressure,
downstream the regulator. When the receiver pressure is
above the valve setting, the shutter remain closed. As the
receiver pressure drops below the valve setting, the shutter
begins to open and the amount of its opening is proportional
to the change of receiver pressure. As the receiver pressure
continues to drop, the shutter continues to open farther until
the limit of the stoke is reached and the valve is completely
open. Regulators series 3350 regulate only in dependence
on the outlet pressure change, pressure change on the inlet
side do not affect the degree of opening since the valve is
equipped with an equalization bellow with an effective area
equal to valve seat. The factory pressure setting of these
valves is 8 bar, this means that until the receiver pressure is
above the 8 bar the valve remains closed, when the receiver
pressure drops below the 8 bar the valve begin to open.
According to the characteristics of the refrigerating system
it can be necessary to change the valve setting adjusting the
setting screw on the top of the body; the pressure setting
range is from 3 bar up to 20 bar.
APPLICATIONS
The receiver pressure regulators series 3350, shown
in this chapter, are classified “Pressure accessories” in
the sense of the Pressure Equipment Directive 94/23/
EC, Article 1, Section 2.1.4 and are subject of Article 3,
Section 1.3 of the same Directive.
They are designed to operate on refrigerating systems,
which use the following refrigerant fluids: R22 , R134a ,
R404A , R407C , R507 proper to the Group II (as defined in
Article 9, Section 2.2 of Directive 97/23/EC and referred
to in Directive 67/548/EEC).
The 3350 regulator is used coupled with the 3340
regulator, alternatively to 3136 differential valve. These
two valves form a regulating system that maintain
constant condensing and receiver pressure in plant with
heat recover and air and water condensation. The 3340
regulator restricts the liquid flow from the condenser to
the receiver, thus reducing the active condenser surface
and raising the condensing pressure. The 3350 regulator
REGULATING VALVES FOR REFRIGERATING SYSTEMS
COSTRUCTION
The main parts of receiver regulators series 3350 are
made with the following materials:
• Hot forged brass EN 12420 – CW 617N for body
• Copper tube EN 12735-1 – Cu-DHP for solder
connections
• Austenitic stainless steel AISI 321 for bellow
• Brass bar EN 12164 – CW 614N for shutter
• Brass bar EN 12164 – CW 614N for setting screw
• Spring steel DIN 17223/84 Class C/D for setting spring
• Chloroprene rubber (CR) for outlet seal gaskets
INSTALLATION
While condensing pressure regulators series 3340 is
mounted in the liquid line between the condenser and the
liquid receiver the receiver pressure regulator series 3350
is mounted between the compressor discharge and the
inlet of liquid receiver.
ed. 001-RP-ENG
47
3340
Installation
Refrigerating systems with air condenser. The regulator is installed as a
bypass between compressor discharge and the liquid receiver inlet.
CONDENSER
3350
TABLE 1: General characteristics of condensing pressure regulators 3340
Connections
Catalogue
Number
ODS
SAE
Flare
Ø [in.]
Ø [mm]
1/2”
–
–
3350/M12S
–
–
12
3350/4S
–
1/2”
–
3350/5
5/8”
–
–
3350/5S
–
5/8”
16
3350/7S
–
7/8”
22
3350/4
Kv
Factor
[m3/h]
1,80
Regulating
range [bar]
min.
max.
3
20
TS [°C]
Factory
setting
[bar]
min.
8
-40
max.
PS
[bar]
Risk Category
according
to PED
+110
28
Art. 3.3
TABLE 2: Dimensions and Weights of regulators 3340
Catalogue
Number
Dimensions [mm]
Weight
[g]
H
H1
H2
L
3350/4
159
76,5
45,5
48
510
3350/M12S
183
100,5
69,5
64
500
3350/4S
183
100,5
69,5
64
3350/5
163
80,5
49,5
52
3350/5S
183
100,5
69,5
64
510
3350/7S
194
112
81
75,5
570
48
ed. 001-RP-ENG
L1
37
D
32
500
560
REGULATING VALVES FOR REFRIGERATING SYSTEMS
WATER REGULATING VALVES
being a notable operating economy.
Valve setting is performed in the works at a pressure of
7.5 bars. Setting is modified by turning the control screw.
Three reference notches, marked with letters A, B and C,
are present on the spring cover.
Each notch is equivalent to a different spring setting.
The notches are referred to the following condensation
pressures:
• Letter A equivalent to about 7.5 bar (valid for R134a at a
temperature of condensation of 30°C)
• Letter B equivalent to about 14 bar (valid for R404A,
R407C and R507 at a temperature of condensation of
30°C)
• Letter C equivalent to about 20 bar (top limit of working
pressure).
MATERIALS
The materials used for the main parts are:
• ST-UNI-EN 12165 - CW 617 N hot-forged brass for the
main body;
• Austenitic stainless steel – AISI 303 for the seat;
• Nitril rubber (NBR) for seat gasket;
• NBR coated-fabric for diaphragms.
INSTALLATION
APPLICATIONS
The water regulating valve, employed with condenser fed
with either main or well water, keeps the condensation
pressure constant at the previously set value by adjusting
the water flow so as to ensure a balanced heat exchange
under all conditions.
At plant start-up, this adjustment is designed to allow
the thermostatic valve rapidly reaches normal operating
conditions and subsequently, during the operations, to
avoid excessive pressure increases or decreases under
different flow conditions. An excessive rise of high
pressure affects the refrigerating capacity of the system.
On the other side, pressure lowering leads to insufficient
refrigerant feeding of the evaporator with consequent
increased gas over heating and parallel reduction of gas
pressure at the compressor suction. Castel valves are
appropriate for refrigerate fluids HCFC and HFC and only
for main and well water.
OPERATIONS
The moving elements of the valve are a metal bellows
and a shutter. The thrust of the refrigerant condensation
pressure outside the bellows favours the opening of the
valve and the thrust of the adjustment spring on the
shutter acts in the opposite sense. Given a specific setting
of the spring, the valve progressively opens in line with
the increasing condensation pressure, and closes when
this pressure decreases. When the compressor stops, the
valve closes: water is no longer fed into the condenser, this
REGULATING VALVES FOR REFRIGERATING SYSTEMS
The valve will be mounted on the water outlet side of
the condenser, preferably vertically, with the bellows
downward. The high-pressure connection to the bellows
must show no deflection. The arrow on the valve body
shows water flow direction.
EXAMPLE OF VALVE SELECTION
A refrigerating system including a hermetic compressor
and a condenser fed with mains water.
• Mains water pressure: 3 bar
• Water temperature at the condenser inlet: 14 °C
• Expected thermal difference: Dt = 10 °C
• Condensation temperature expected on the basis of
the water/refrigerant heat exchange in the condenser:
approximately 6 °C above the water temperature at
the outlet, equivalent to 30 °C (with a corresponding
saturation pressure) (fig. 19
• Refrigeration yield at the level of the evaporator: 18,6
kW under the following conditions:
• condensation temperature: + 30 °C
• evaporation temperature: - 15 °C
Thermal power to be disposed of at the level of the
condenser (Table 2):
18,6 x 1,325 = 24,65 [kW]
Water flow rate:
(24,65 x 860)/10 = 2120 l/h =2,12 [m3/h]
ed. 001-RP-ENG
49
The pressure drop corresponding to the water flow rate
specified above in the condenser/piping circuit, with the
exclusion of the water regulating valve, is about 2,5 bar.
The water regulating valve has this pressure differential
at its disposal:
1/4"
A
RANGE
5-18 bar
MAX WATER PRESS.
10 bar
MAX WATER TEMP.
80 |BC
MEDIUM R134a-R404A-R12-R22-R502
B
C
99
At Δ∆p = 0,5 bar the 3210/04 valve, completely opened,
ensures the required flow rate (fig. 2).
When the point of intersection of pressure differential
through the valve and flow range is within the area
between the curves of two valves, select the valve with
larger diameter.
When the valve is completely closed, the pressure must be
the same as the refrigerant saturation pressure at the air
temperature of the place where the condenser is installed.
When the valve begins to open, the pressure is about 0,2
bar above the pressure when the valve is totally closed.
MADE IN ITALY
CAT.
∆p = 3 – 2,5 = 0,5 bar
48
Ch
A02
87
L
1/4"Flare
TABLE 1: General Characteristics
Catalogue
Number
Connections
UNI ISO
228/1
3210/03
G 3/8"
3210/04
G1/2"
3210/06
G 3/4"
50
ed. 001-RP-ENG
Working
pressure
[bar]
Maximum
water
pressure [bar]
Maximum
water
temperature
[°C]
Kv
Factor
[m3/h]
Refrigerant
max working
pressure [bar]
2
5 - 20
10
80
3
4,7
22
Ch
L
27
70
32
74
Weight
[g]
1015
985
1010
REGULATING VALVES FOR REFRIGERATING SYSTEMS
Condensing Temperature
30°C
24°C
Water Temperature
14°C
Heat exchange surface
Fig. 1 - Heat exchange pattern in the condenser
CHARACTESTICS CURVES
Q [m3/h]
7
6,5
6
5,5
3210/06
5
4,5
4
3210/04
3,5
3
2,5
3210/03
2
1,5
1
0,5
2,75
2,625
2,5
2,375
2,25
2,125
2
1,875
1,75
1,625
1,5
1,375
1,25
1,125
1
0,875
0,75
0,625
0,5
0,375
0,25
0,125
0
0
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
p [bar]
p [H2O]
Fig. 2 -Charactestics curves when the valves are completly open
REGULATING VALVES FOR REFRIGERATING SYSTEMS
ed. 001-RP-ENG
51
TABLE 2: Thermal factor for hermetic refrigeration compressor. Relationship between the total heat to be
disposed of at the level of the condenser and refrigeration capacity at the level of the eavaporator
Condensing
Temperature
[°C]
Evaporating Temperature [°C]
-35
-30
-25
-20
-15
-10
-5
0
+5
+10
+30
1,524
1,473
1,421
1,371
1,325
1,281
1,238
1,200
1,163
1,133
+35
1,553
1,503
1,453
1,403
1,355
1,310
1,268
1,228
1,188
1,155
+40
1,578
1,531
1,484
1,435
1,387
1,340
1,295
1,254
1,210
1,175
+45
-
-
1,521
1,475
1,425
1,377
1,330
1,285
1,240
1,200
+50
-
-
-
-
1,468
1,420
1,369
1,320
1,270
1,227
+55
-
-
-
-
1,520
1,465
1,412
1,363
1,304
1,255
+60
-
-
-
-
-
1,526
1,457
1,398
1,338
1,285
TABLE 3: Thermal factor for open compressor (direct or belt driven). Relationship between the total heat to be
disposed of at the level of the condenser and refrigeration capacity at the level of the eavaporator
Condensing
Temperature
[°C]
Evaporating Temperature [°C]
-35
-30
-25
-20
-15
-10
-5
0
+5
+10
+30
1,460
1,417
1,371
1,330
1,291
1,243
1,213
1,178
1,143
1,114
+35
1,495
1,450
1,405
1,367
1,320
1,279
1,240
1,202
1,168
1,133
+40
1,537
1,530
1,441
1,396
1,350
1,306
1,265
1,224
1,185
1,152
+45
-
-
1,485
1,437
1,390
1,342
1,295
1,252
1,211
1,175
+50
-
-
-
1,482
1,431
1,381
1,334
1,288
1,241
1,120
+55
-
-
-
-
-
1,426
1,369
1,320
1,274
1,228
+60
-
-
-
-
-
1,474
1,410
1,355
1,330
1,255
52
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
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ed. 001-RP-ENG
ed. 001-RP-ENG
REGULATING VALVES FOR REFRIGERATING SYSTEMS
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