HIGH-PRESSURE
RELIEF VALVES
VALVES & ACTUATORS
H-900HP SERIES
FEATURES
GENERAL
H-900HP is available as CE/PED products
n 316St.St. Construction
n Service up to 6000 psi
n Set Pressure from 50 psig to 6000 psig ( 3.50 to 414 bar)
n Identifying colored springs for each pressure range
n Replaceable springs for a variable pressure range
n Available in all pipe threads and LET-LOK® connectors
n Sizes: 1/4" or 6mm
H-900 HP is a series of relief valves for high-pressure service.
The valve is normally closed.
It will open when the system pressure reaches the set level.
It will re-close when the system pressure falls below the set level.
n
1
2
3
MATERIALS OF CONSTRUCTION
Item No.
Components
Qty.
Valve Body Material
Cap Plug
Label
1
PTFE
1
Polyester
Adjustment Cap
Spring
1
St.St 316
1
St.St. 302,17-7PH
Lower Spring Button
Locking Nut
1
St.St 316
1
St.St 316
Bonnet
O-Ring
1
St.St 316
1
Fluorocarbon FKM
Quad Ring
Retaining Ring
1
Fluorocarbon FKM
1
PH15-7Mo
Poppet
Clamps Screw
1
St.St 316
1
St.St 316
1
Fluorocarbon FKM
14
O-Ring
Insert
1
St.St 316
15
Body
1
St.St 316
1
2
3
4
5
6
7
8
9
10
11
12
13
4
5
6
7
8
VALVES & ACTUATORS
STANDARD CONFIGURATION DIMENSIONS
Connection / size
Description
H-900HP
H-900HP
inlet
1/4 LET-LOK
Dimensions
A
outlet
®
6MM LET-LOK® 6MM LET-LOK®
H-985HP
H-995HP
C
D
9
10
mm inch mm inch mm inch mm inch
1/4 LET-LOK
®
B
37 1.45 39 1.53 50 1.97 96.0 3.78
37 1.45 39 1.53 50 1.97 96.0 3.78
1/4 Male NPT
1/4 Female NPT
32 1.26 30 1.18 40 1.57 88.6 3.49
1/4 Male NPT
1/4 LET-LOK®
32 1.26 39 1.53 50 1.97 88.6 3.49
11
12
13
14
Lock Wire
Holes
15
D
A
C
294
B
HIGH-PRESSURE RELIEF VALVES H-900HP SERIES
CLEANING & PACKAGING
TESTING
Every H-900HP series Relief valve is cleaned in accordance with
Standard Cleaning and Packaging (procedure 8184). Oxygen
Clean & Lubricant Free Cleaning and packaging, in accordance
with Special Cleaning and Packaging (procedure 8185), is available as an option.
The Ham-Let H-900HP Relief Valves design has been tested for
Proof and Burst.
Every H-900HP Relief Valve is factory tested for proper set and
resealing performance.
NOMINAL CRACKING PRESSURE RANGE
psig
Bar
Spring
Designator
Color
White
50-350
3.4 - 24
A
350-750
24 - 51.5
B
Blue
750-1500
51.5 - 103
C
Gold
1500-2250
103 - 155
D
Turquoise
Green
2250-3000
155 - 206
E
3000-4000
206 - 275
F
Red
4000-5000
275 - 344
G
Silver
5000-6000
344 - 413
H
Black
A
B
C
D
E
F
G
H
PRESSURE TEMPERATURE RATING
Series
Fluorocarbon FKM
TEMP
°C (°F)
Buna N
EPDM
MAX SET PRESSURE psig (bar)
-40 (-40)
-34 (-30)
-23 (-10)
Polychloroprene (CR)
-
-
-
-18 (0)
-12 (10)
6000
-4 (25)
-1 (30)
6000
(413)
6000
(413)
6000
(413)
(413)
10 (50)
65 (150)
5600 (386)
5600 (386)
5600 (386)
5600 (386)
93 (200)
5200 (358)
5200 (358)
5200 (358)
5200 (358)
121 (250)
4900 (338)
4900 (338)
4900 (338)
4900 (338)
-
-
4700 (324)
-
135 (275)
148 (300)
SETTING AND RESEALING PRESSURE
Upstream set pressure is the first indicator of flow process.
Every pressure relief after the first is repeatable within
a deviation of 5% at room temperature.
H-900HP RESEAL PRESSURE
n
Series
Test Set Pressure
psig (bar)
H-900HP
100 - 200 (6.8 to 13.7)
850 - 1000 (58.5 to 68.9)
n Blocked upstream set pressure is the first indicator of a stopped
flow process and is always lower than the set pressure.
HAM-LET ADVANCED CONTROL TECHNOLOGY
VALVES & ACTUATORS
Seal Meterial
H-900HP Size: 1/4"
Min Resealing Pressure
as a
Percentage of set
pressure, %
50
84
295
FLOW DATA AT 70°F (20ºC)
Orifice in fully open mode is 3.6mm (0.14 inch)
A
B
SPRING 50-350psig
SPRING 350-750psig
AIR FLOW
WATER FLOW
Water Flow (LPM)
1500
2000
2500
si
700 p
800
i
550 ps
600
300 psi
10
20
30
40
50
60
70
80
2
1
400
150 psi
200
2000
1500
0
0.2
0.4
1
0.6 0.8
1.2 1.4
1.6
1.8
2
Water Flow (LPM)
2000
2500
0
165
psi
138
1600
psi
110
1400 psi
83
1000 psi
20
30 40 50 60 70
Air Flow (SCFM)
0.4
0.6
0.8
1.0
165
si
2000 p
2000
138
0 psi
160
1600
1400 psi
1200
1000 p
si
00 psi
i
110
83
8
800 ps
10
0.2
2400
Pressure Drop (Psi)
1000
Inlet Pressure (bar)
Inlet Pressure (Psig)
VALVES & ACTUATORS
14
50 psi
WATER FLOW
500
1200
296
27
300 psi
Air Flow (SLPM)
0
0
41
400 psi
SPRING 1500-2250psig
AIR FLOW
800
55
D
SPRING 750-1500psig
1600
70
Water Flow (US.GPM)
C
2000
7
6
5
550 psi
Air Flow (SCFM)
2400
4
3
700 psi
600
0
90 100
0
80
55
90 100
800
0
HIGH-PRESSURE RELIEF VALVES H-900HP SERIES
0.04 0.08 0.12 0.16 0.2 0.24
Water Flow (US.GPM)
55
0.28 0.32
Pressure Drop (bar)
0
800
14
50 psi
0
55
27
150 psi
200
1000
41
i
s
400 p
400
70
Pressure Drop (Psi)
Inlet Pressure (Psig)
1000
500
Inlet Pressure (bar)
0
1000
Pressure Drop (bar)
Air Flow (SLPM)
FLOW DATA AT 70°F (20ºC)
Orifice in fully open mode is 3.6mm (0.14 inch)
E
F
SPRING 2250-3000psig
SPRING 3000-4000psig
AIR FLOW
WATER FLOW
Water Flow (LPM)
3800
4000
2000
2500
psi
240
32
psi
2800
3000
206
0 psi
250
10
20
30
40
60
70
80
3500
3000
0
AIR FLOW
0.2
172
0.24 0.28 0.32
Water Flow (LPM)
300
200
400
500
413
0 psi
550
4800
386
359
psi
4800
330
4200
4400
4
6
8
psi
10
303
12
14
16
18
20
0.2
0.4
0.6
0.8
1.0
6200
276
Air Flow (SCFM)
HAM-LET ADVANCED CONTROL TECHNOLOGY
Pressure Drop (Psi)
5200
0
Inter Pressure (bar)
100
2
206
WATER FLOW
Air Flow (SLPM)
0
i
0 ps
Water Flow (US.GPM)
SPRING 5000-6000psig
4000
240
0.04 0.08 0.12 0.16
SPRING 4000-5000psig
5600
psi
250
H
6000
310
i
0 ps
G
0
1.0
275
280
90 100
0.8
psi
3200
Air Flow (SCFM)
Inlet Pressure (Psig)
0.6
3800
4000
2500
172
50
0.4
i
0 ps
550
5800
5400
400
372
si
0p
480
5000
345
i
0 ps
420
4600
4200
427
0
0.04
0.08 0.12
0.16
317
0.2
0.24
Pressure Drop (bar)
0
4500
310
275
i
00 ps
3500
2500
1500
0.2
VALVES & ACTUATORS
1000
500
Pressure Drop (Psi)
0
Inter Pressure (bar)
Inlet Pressure (Psig)
4500
0
Pressure Drop (bar)
Air Flow (SLPM)
290
0.28 0.32
Water Flow (US.GPM)
297
APPLICATIONS
OPERATION
H-900HP relief valves gradually open when pressure increases.
As such, they are not certified to ASME due to not having
capacity rating at a given pressure rise (accumulation).
H-900HP relief valves open when system pressure gets to the set
pressure and close when system pressure drops below the set
pressure.
Warning
n
Valves that were not actuated for some time may contain
pressure higher than the set pressure.
n System designer and users shall determine what system
applications require using relief valves for meeting
specific safety codes and which valves conform to such codes.
H-900HP ORDERING INFORMATION
OPTIONAL
H-9
00 - HP -
VALVES & ACTUATORS
Valve Series
-
SS
-
L
1/4
-
A
-
-
Body Material
End Connection Size
Seal Material
SS - 316 St.St.
1/4
BLANK
BU
EP
NE
6MM
Valve Type
End Connection
Spring Designator
00 - LET-LOK® Ends
85 - Male to Female End
95 - Male to LET-LOK® End
L
N
R
NL
- LET-LOK®
A, B, C, D, E, F, G, H
- NPT
See table:
"NOMINAL CRACKING
PRESSURE RANGE"
- ISO Tapered
- NPT to LET-LOK®
For other end connections,
please contact HAM-LET
representative.
-
- Fluorocarbon FKM
- Buna N
- EPDM
- Polychloroprene (CR)
CE/PED Certification
BLANK - Standard testing
- Certification PED
CE
Factory Calibration
Designator
97/23/EC
50-6000 Psi
Treatment
Example: H-900-HP-SS-L-1/4-A120
Will be Calibrated to 120 Psi
BLANK - Standard Cleaning &
Passivation
OC
LF
ORDERING INFORMATION FOR SPARE KITS
SPRING KIT
SEAL KIT
Includes:
Spring (specific to desired set pressure range) and label.
Includes: O-Rings and label
Z - 900 - HP -
Z - 900 - HP -
SPK
-
1/4
-
A
-
1/4
Body Designator
per End Connection
Spring Designator
Body Designator
per End Connection
1/4 for all end connections
A, B, C, D, E, F, G, H
1/4 for all end connections
See table above
n For oxygen applications work shall be carried out according to procedures for
working with oxygen. In case spare kits are ordered for oxygen clean valves, such
kits have to be ordered as oxygen clean by adding "-OC" designator.
Example: Z-900-HP-SK-1/4-VI-OC
Warning!
The system designer and user have the sole responsibility for selecting products suitable for their special
application requirements, ensuring their safe and trouble-free installation, operation, and maintenance. Application details, material compatibility and product ratings should all be considered for each selected product.
Improper selection, installation or use of products can cause property damage or personal injury.
H-900HP, Rev.09, January 2014
298
SK
- Oxygen Clean
- Lubricant Free
HIGH-PRESSURE RELIEF VALVES H-900HP SERIES
-
VI
Seal Material
VI
BU
EP
NE
- Fluorocarbon FKM
- Buna N
- EPDM
- Polychloroprene (CR)