K 512
Flow controller
Pressurisation & Water Quality
Balancing & Control
Thermostatic Control
ENGINEERING ADVANTAGE
The compact K 512 flow controller’s automatically gives the correct flow in heating and cooling
systems as well as in district heating substations.
Flow controllers - K 512
Inline design
Inline flow allows high pressure drops without noise.
Adjustable flow
Ensures the design flow.
Compatibility with KTx valves
Sharing the same body makes upgrading straightforward.
Technical description
Application:
Heating and cooling systems.
District heating substations.
Temperature:
Max. working temperature: 140°C
Min. working temperature: -10°C
Functions:
Automatic flow limitation
Media:
Water or neutral fluids, water-glycol mixtures.
Dimensions:
DN 15-125
Material:
Valve body: Ductile iron EN-GJS-400-18LT
Diaphragms and gaskets: EPDM
Pressure class:
PN 25
DN 65-125: PN 16 and PN 25
Surface treatment:
Electrophoretic painting.
Max. differential pressure (ΔpV):
1600 kPa = 16 bar
Marking:
TA, DN, PN, Fc, Kvs, GGG-40.3 and flow direction arrow.
Pressure drop in the throttle (Fc):
12 kPa, 20 kPa and 40 kPa.
Flanges:
DN 15-50: According to EN-1092-2:1997, type 16.
DN 65-125: According to EN-1092-2:1997, type 21.
2
Flow controllers - K 512
Operating function
The throttle (2) for flow adjustment and inline flow controller (6) are built in series in one valve body (7). Pressure upstream of
the throttle acts through internal capillary pipe (V+) to one side of diaphragm (8) in the flow controller and attempts to close
it.
Pressure downstream of the throttle acts through another internal impulse to the other side of the diaphragm and attempts to
open the valve together with the spring force.
The accuracy of flow regulation is practically independent on the pressures upstream and downstream of the regulator.
V+
1
2
3
4
9
5
6
8
1. Fixing nut
2. Throttle
3. Holes for plombing (throttle)
4. Holes for plombing (valve body)
5. Venting screws
6. Flow controller
7. Valve body
8. Diaphragm
9. Plug
7
Sizing
1. Select the smallest size for the flow you need according to qmax in the product tables.
2. Check that the available Δp is lager than the sum of the pressure drops calculated according to the formula:
(
∆pmin = Fc + 0.01
q
)
Kvd
2
[l/h, kPa]
Installation
Installation in supply or return pipe. Flow direction is shown by the arrow on the valve body. Installation of a strainer upstream
of the valve is recommended. When filling, vent the body by using the venting screws. Instead of the plug R1/4 you can install
drain valve or measurement point for pressure or temperature measurement.
Normal pipe fittings
Try to avoid mounting taps and pumps immediately before
the valve.
Application example
STAD (STAF)
K 512
3
Flow controllers - K 512
Setting
Presetting of the maximum flow
Release the fixing nut (1). Turn the flow setting screw (2)
clockwise to position of 0,0 turns. Turn the flow setting screw
anticlockwise the corresponding number of turns according
to flow chart. Tighten the fixing nut. The flow setting can be
plomed by using holes (3a and 3b) on flow setting screw and
the valve body.
3a
1
2
4
a Measure the flow on the balancing valve STAD using the
balancing instrument TA-SCOPE or measuring instrument
TA-CMI.
b Adjust the throttle until you measure the required flow on
the TA-SCOPE or TA-CMI.
c Lock the fixing nut. When you lock the nut please hold the
throttle in place with an allen key.
3b
Table - Example:
Valid table is delivered with each valve.
,0
,1
,2
,3
,4
,5
,6
,7
,8
,9
Alternative:
a Take the presetting value from the table which is packed
with the valve.
b Open the throttle anti-clockwise. The preset value (e.g.
3,4) means that you open the valve three complete turns.
After that turn until the figure 4 fits the red mark on the
valve body.
c Lock the fixing nut. When you lock the nut hold the
throttle in place with an allen key.
Position - Einstellung
0, 0
1 ,0
2, 0
3 ,0
4, 0
57
19 8
4 35
656
80 4
71
22 2
4 57
671
81 5
85
24 5
4 79
686
82 5
99
26 9
5 01
700
83 6
11 3
2 93
523
715
84 6
12 8
3 17
546
730
85 7
14 2
3 40
568
745
86 7
15 6
3 64
590
760
87 8
17 0
3 88
612
774
88 8
18 4
4 11
634
789
89 9
Flow - Volumenstrom (l/h)
p1=4bar p2=3bar ∆p=1bar
∆p < >> 1 bar ∆ ⇒ Flow = ≈
Articles
DN 15-50
PN 25
ØD
Article No
DN
d
D
L
Kvd
qmax
[m3/h]
Kg
Fc = 12 kPa
52 756-720
52 756-725
52 756-740
15/20
25/32
40/50
R1
R1 1/4
R2
90
105
138
110
150
190
4,1
16
35
0,9
2,8
7,0
1,3
2,9
4,5
Fc = 20 kPa
52 756-820
52 756-825
52 756-840
15/20
25/32
40/50
R1
R1 1/4
R2
90
105
138
110
150
190
4,1
16
35
1,1
4,0
10
1,3
2,9
4,5
Fc = 40 kPa
52 756-920
52 756-925
52 756-940
15/20
25/32
40/50
R1
R1 1/4
R2
90
105
138
110
150
190
4,1
16
35
1,5
6,5
14
1,3
2,9
4,5
d
d
L
→ = Flow direction
Kvd = Is the Kv value of the differential pressure control component when fully open, used to
calculate the minimum pressure drop necessary for the valve to operate according to the formula
found under “Sizing”.
4
Flow controllers - K 512
DN 65-125
DN 65-125 are flanged and do not need any separate connections.
PN 25 (DN 65-80 also fit PN 16 flanges)
Article No
DN
D
L
Kvd
qmax
[m3/h]
Kg
Fc = 12 kPa
52 773-565
52 773-580
52 773-590
52 773-591
65
80
100
125
220
220
320
320
290
310
350
400
70
70
100
150
15
18
32
38
20
22
54
55
Fc = 20 kPa
52 773-665
52 773-680
52 773-690
52 773-691
65
80
100
125
220
220
320
320
290
310
350
400
70
70
100
150
20
24
40
50
20
24
50
55
Fc = 40 kPa
52 773-765
52 773-780
52 773-790
52 773-791
65
80
100
125
220
220
320
320
290
310
350
400
70
70
100
150
30
34
55
70
20
24
50
55
Article No
DN
D
L
Kvd
qmax
[m3/h]
Kg
Fc = 12 kPa
52 773-290
52 773-291
100
125
320
320
350
400
100
150
32
38
54
55
Fc = 20 kPa
52 773-390
52 773-391
100
125
320
320
350
400
100
150
40
50
50
55
Fc = 40 kPa
52 773-490
52 773-491
100
125
320
320
350
400
100
150
55
70
50
55
ØD
L
PN 16
→ = Flow direction
Kvd = Is the Kv value of the differential pressure control component when fully open, used to
calculate the minimum pressure drop necessary for the valve to operate according to the formula
found under “Sizing”.
5
Flow controllers - K 512
Connections
d1
d2
With female thread
Threads according to ISO 228
L1
d1
d2
With male thread
Threads according to ISO 7
d1
For welding
L1
d2
d1
ØD
EAN
d1
d2
L1*
52 759-015
52 759-020
52 759-025
52 759-032
52 759-040
52 759-050
7318793546609
7318793546708
7318793546807
7318793546906
7318793547002
7318793547101
G1
G1
G1 1/4
G1 1/4
G2
G2
G1/2
G3/4
G1
G1 1/4
G1 1/2
G2
26
32
47
52
52
64,5
Article No
EAN
d1
d2
L1*
G1
G1
G1 1/4
G1 1/4
G2
G2
R1/2
R3/4
R1
R1 1/4
R1 1/2
R2
34
40
40
45
45
50
52 759-115
52 759-120
52 759-125
52 759-132
52 759-140
52 759-150
L1
ØD
Article No
With flange
Flange according to EN-1092-2:1997,
type 16.
L1
Article No
EAN
d1
D
L1*
52 759-315
52 759-320
52 759-325
52 759-332
52 759-340
52 759-350
7318793547200
7318793547309
7318793547408
7318793547507
7318793547606
7318793547705
G1
G1
G1 1/4
G1 1/4
G2
G2
20,8
26,3
33,2
40,9
48,0
60,0
37
42
47
47
47
52
Article No
EAN
d1
d2
D
L1*
52 759-515
52 759-520
52 759-525
52 759-532
52 759-540
52 759-550
7318793547804
7318793547903
7318793548009
7318793548108
7318793548207
7318793548306
G1
G1
G1 1/4
G1 1/4
G2
G2
M12
M12
M12
M16
M16
M16
95
105
115
140
150
165
10
20
5
15
5
20
*) Fitting length (from the gasket surface to the end of the
connection).
The products, texts, photographs, graphics and diagrams in this document may be subject to alteration by TA Hydronics
without prior notice or reasons being given.
For the most up to date information about our products and specifications, please visit www.tahydronics.com.
6-10-20 K 512 03.2011
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