INDUSTRIAL EXCESS ESS FLOW VALVES

INDUSTRIAL EXCESS ESS FLOW VALVES H-911 SERIES

FEATURES n Stainless Steel Construction n MAWP 6000 psi (413 bar) n MAWT 400 F (204 C) n Variable connection sizes (1/8 to 1/2'' & 6 to 12mm) n Cv = 0.5 ; 1.1 n Safety System Shutoff Device GENERAL 1. The poppet is loaded by a spring in a normally open position as long as the system is balanced. 2. If the system becomes unbalanced and the downstream pressure drops, the poppet moves towards the sealing area and prevents free, uncontrolled excess flow from the line. 3. If the downstream pressure increases, the ventilation outlet ("bleeding") enables the system to balance the pressures and (with the help of the spring) reset the system. In this situation, the poppet reverts back to Normally Open. Excellent for Automatic Safety Shutoff in a wide range of areas: n Fuel systems n Toxic Media Systems n Gas Systems n Valued Media Systems n Hydraulic & Pneumatic Systems. OPERATING PRINCIPLE Normally Open Position P2 P1 P1 P2 Closed Position During Excess Flow Downstream 278 INDUSTRIAL EXCESS FLOW VALVES H-911 SERIES

CLEANING & PACKAGING Every H-911 series Excess flow 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. TESTING The design of the H-911 Valves has been tested for Proof and Burst. Every assembled valve is tested for proper functionality. MATERIALS OF CONSTRUCTION Item. Components Qty. Valve Body Material 1 Insert 1 St.St.ASTM - 276 2 Back Up 1 Fluorocarbon FKM 3 O-ring 1 Fluorocarbon FKM 4 Body 1 St.St.ASTM - 276 5 Spring 1 St.St. 302 6 Poppet 1 St.St.ASTM - 276 1 3 2 6 5 4 5 Spring Resets the system back to the normally open position when the downstream pressure equalizes the upstream pressure. 6 Open Postion Poppet - Produced from stainless steel. - Enables high flow rates. - Improves reliability and performance. Vent "Bleeding" Enables "information transfer" between the two sides of the valve, and automatically resets the system. Metal Sealing Improves stability and repeatability. Does not need maintenance. Closed Postion HAM-LET ADVANCED CONTROL TECHNOLOGY 279

PRESSURE TEMPERATURE RANGES n The estimate refers to O-Rings and back up made from Fluorocarbon FKM. n For O-Rings made from other materials, see ordering information. n 5000 psi (344 bar) for the H-911 Series with end connections 3/8 NPT female. n 4600 psi (316 bar) for the H-911 Series with end connection 1/2 NPT female. K K PRESSURE TEMPERATURE RANGES FOR 316 St.St Temperature F (C ) Working Pressure, psi (bar) -10 (-23) to 100 (37) 6000 (413) 200 (93) 5160 (355) 250 (121) 4910 (338) 300 (148) 4660 (321) 400 (204) 4280 (294) PRESSURE TEMPERATURE RANGES O-ring Material Temperature Rating F (C ) Fluorocarbon FKM -15º to 400 (-26 to 204) Buna-N -40º to 250 (-40 to 121) Ethylene propylene -50º to 300 (-45 to 148) Perfluor -10º to 400 (-23 to 204) Polychloroprene (CR) -40º to 250 (-40 to 121) Fluorocarbon FKM O-Rings are standard. For other O-Ring materials, see ordering information. For O-Ring materials that are not in this table, please consult HAM-LET. STANDARD CONFIGURATION DIMENSIONS End Connection Dimensions: inch (mm) Type Size L K1 K2 LET-LOK Tube Fittings Female NPT Male NPT Male NPT to LET-LOK Tube Fittings Male to Female NPT Male Face Seal 1/4'' 2.43 (61.7) 11/16 11/16 3/8'' 2.75 (69.9) 1/2'' 2.97 (75.4) 1 1 6 mm 2.43 (61.7) 11/16 11/16 8 mm 2.70 (68.6) 1 1 10 mm 2.80 (71.1) 12 mm 2.96 (75.2) 1 1 1/8'' 1.87 (47.5) 11/16 11/16 1/4'' 2.12 (53.8) 11/16 11/16 3/8'' 2.55 (64.8) 1 1 1/2'' 3.03 (77.0) 1 1 1/8'' 1.79 (45.5) 1/4'' 2.17 (55.1) 11/16 11/16 3/8'' 2.36 (59.9) 1/2'' 2.73 (69.3) 1 1 1/4'' 2.30 (58.4) 11/16 11/16 3/8'' 2.56 (65.0) 1/2'' 2.85 (72.4) 1 1 1/4'' 2.13 (54.1) 11/16 11/16 3/8'' 2.46 (62.5) 1 1 1/2'' 2.89 (73.4) 1 1 1/4'' 2.28 (57.9) 11/16 11/16 1/2'' 2.73 (69.3) 1 1 Dimensions are for reference only, and are subject to change. 280 INDUSTRIAL EXCESS FLOW VALVES H-911 SERIES

FLOW DATA AT 70 F (20 C) For springs with other trip ranges, consult a HAM-LET representative. AIR FLOW - CONNECTION SIZES : 1/4", 6MM AIR FLOW - CONNECTION SIZES : 3/8", 10MM 6000 5000 Flow (std L/min) 2500 5000 8000 10000 13000 16000 20000 22000 2000 3500 4500 6000 7000 8000 9000 10000 11000 6000 400 400 Trip Range Trip 5000 350 Range 350 Inlet Pressure (psig) 4000 3000 2000 300 200 150 Inlet Pressure (bar) Inlet Pressure (psig) 4000 3000 2000 300 200 150 Inlet Pressure (bar) 1000 70 1000 70 100 8 40 80 120 160 200 240 280 320 360 400 Flow (std ft3/min) 100 80 180 280 380 480 580 680 780 Flow (std ft3/min) 8 WATER FLOW Connection Size CV Trip Range U.S. gal/min (L/min) 1/8, 1/4, 6mm 0.5 3.9 to 5.8 (14.7 to 21.9) 3/8, 8mm, 10mm 8.2 to 10.0 (31.0 to 37.9) 1.1 1/2, 12mm 11.2 to 14.9 (42.4 to 56.4) AIR FLOW - CONNECTION SIZES : 1/2", 12MM Inlet Pressure (psig) Flow (std L/min) 3000 6000 9000 11000 17000 22000 28000 33000 6000 Trip 400 Range 5000 4000 3000 2000 1000 100 8 100 200 300 400 500 600 700 800 900 1000 1200 1300 Flow (std ft3/min) 350 300 200 150 70 Inlet Pressure (bar) HAM-LET ADVANCED CONTROL TECHNOLOGY 281

H-911 SERIES ORDERING INFORMATION OPTIONAL H-911-00 - SS - L - 1/4 - - Valve Series Material Treatment SS - St.St.316 BLANK - Standard Cleaning & Passivation OC - Oxygen Clean LF - Lubricant Free Valve Type 00 - LET-LOK End 10 - Female End 80 - Male End 85 - Male to Female End 95 - Male to LET-LOK End End Connection Type L - LET-LOK Tube Fitting N - Threaded NPT R - ISO Tapered GL - Face Seal Male Connector HL - ONE-LOK Tube Fitting HO - O-ring Face Seal Male OB - SAE/MS Other end connections are available upon request. End Connection Size * 1/8 6 MM 1/4 8 MM 3/8 10 MM 1/2 12 MM *1/8 is available for Female and Male Thearded ends only O-Ring Material BLANK - Fluorocarbon FKM BU - Buna N EP - EPDM NE - Polychloroprene (CR) KZ - Perfluor 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-911, Rev.08, January 2014 282 INDUSTRIAL EXCESS FLOW VALVES H-911 SERIES

RELIEF VALVES H-900 SERIES

FEATURES n H-900 is available as CE/PED products n 316 St.St. Construction n Service 10-225 psi n MAWP* 300 psi n One spring for all set pressure range n Available in all pipe threads and LET-LOK connectors n Sizes: 1/4" or 6mm * Maximum Allowed Working Pressure. GENERAL The H-900 series is a relief valve for low 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. 1 3 2 MATERIALS OF CONSTRUCTION Item No. Components Qty. Valve Body Material 1 Cap Plug 1 Polypropylene 2 Adjustment Cap 1 St.St. 316 3 Cap Lable 1 Polyester 4 Locking Nut 1 St.St. 316 5 Upper Spring Button 1 St.St. 316 6 Spring 1 St.St. 302 7 Lower Spring Button 1 St.St. 316 8 Bonnet 1 St.St. 316 9 O-ring 1 Fluorocarbon FKM 10 O-ring 1 Fluorocarbon FKM 11 Retaining Ring 1 PH15-7 Mo 12 Stem 1 St.St. 316 13 Bonded Poppet 1 St.St. 316 Bonded with Fluorocarbon FKM 14 Insert 1 St.St. 316 15 Packing 1 PTFE 16 Ring 1 St.St. 316 17 Body 1 St.St. 316 7 4 5 6 8 9 STANDARD CONFIGURATION DIMENSIONS Connection / size Dimensions Oriffice Description A B C D Inlet Outlet mm inch mm inch mm inch mm inch mm inch H-900 1/4 LET-LOK 1/4 LET-LOK 37 1.45 39 1.53 50 1.97 96 3.78 H-900 6MM LET-LOK 6MM LET-LOK 37 1.45 39 1.53 50 1.97 96 3.78 4.8 0.19 H-985 1/4 Male NPT 1/4 Female NPT 32 1.26 30 1.18 40 1.57 88.6 3.49 H-995 1/4 Male NPT 1/4 LET-LOK 32 1.26 39 1.53 50 1.97 88.6 3.49 11 13 10 12 14 16 15 Lock Wire Holes D 17 A C B 284 RELIEF VALVES H-900 SERIES

CLEANING & PACKAGING Every H-900 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. TESTING The HAM-LET H-900 Relief Valve designs have been tested for Proof and Burst. Every H-900 Relief Valve is factory tested for proper set and resealing preformance. SETTING AND RESEALING PRESSURE n Upstream set pressure is the first indicator of flow process. Every pressure relief after the first indication is repeatable within a deviation of 5% at room temperature. n Blocked upstream set pressure is the first indicator of a stopped flow process and is always lower than the set pressure. n Calculation of set pressure valve design demands back pressure consideration as the system back pressure increases the set pressure. To balance the system, the back pressure must be multiplied by 0.8 and the result shall be subtracted from the required set pressure. n Lubricant free cleaned valves have higher reseal pressure PRESSURE TEMPERATURE RATING Series H-900 Size: 1/4" Seal Meterial Fluorocarbon FKM Buna N Polychloroprene (CR) EPDM TEMP C ( F) MAX SET PRESSURE psig (bar) -40 (-40) - - - -34 (-30) - - -23 (-10) - -18 (0) -12 (10) -4 (25) -1 (30) 10 (50) 225 (15.5) 225 (15.5) 225 (15.5) 65 (150) 93 (200) 121 (250) 135 (275) 148 (300) - 225 (15.5) FLOW DATA AT 70 F (20ºC) Orifice in fully open mode is 4.8mm (0.19 inch) SPRING 10-225psig WATER FLOW Water Flow (LPM) H900 RESEAL PRESSURE Series H-900 AIR FLOW Test Set Pressure psig (bar) Min Resealing Pressure as a Percentage of set pressure, % 10-20 (0.68 to 1.3) 50 175-225 (12.0 to 15.5) 90 Air Air Flow (SLPM) 0 100 200 300 400 500 300 20.7 250 225 psi 17.2 Pressure Drop (Psi) Pressure Drop (bar) Inlet Pressure (Psi) 200 150 100 150 psi 100 psi 50 psi 13.8 10.3 6.9 Inlet Pressure (bar) 50 3.5 0 0 2 4 6 8 10 12 14 16 18 20 0 Water Flow (US.GPM) Air Flow (SCFM) HAM-LET ADVANCED CONTROL TECHNOLOGY 285

APPLICATIONS H-900 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). OPERATION H-900 relief valves open when the system pressure gets to the set pressure and close when the 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 to meet specific safety codes and which valves conform to such codes. H-900 SERIES ORDERING INFORMATION OPTIONAL H - 9 00 - SS - L - 1/4 - SL - - - Valve Series Body Material End Connection Size Seal Material Valve Type 00 - LET-LOK Ends 85 - Male to Female End 95 - Male to LET-LOK End SS - 316St.St. ORDERING INFORMATION FOR SPARE KITS SPRING KIT End Connection L - LET-LOK N - NPT R - ISO Tapered NL - NPT to LET-LOK For other end connections, please contact HAM-LET representative. 1/4 6MM Spring Designator SL - Silver Code For Spring Range 10-225 psi Factory Calibration Designator 10-225 Psi Example: H-900-SS-L-1/4-SL120 Will be Calibrated to 120 Psi SEAL KIT BLANK - Fluorocarbon FKM BU - Buna N EP - EPDM NE - Polychloroprene (CR) CE/PED Certification BLANK - Standard testing CE - Certification PED 97/23/EC Treatment BLANK - Standard Cleaning & Passivation OC - Oxygen Clean LF - Lubricant Free Includes: Spring, Label, Wire and Lock Includes: O-rings, Bonded Poppet and Label Z - 900 - SPK - 1/4 Z - 900 - SK - 1/4 - VI Body Designator per End Connection Body Designator per End Connection Seal Material 1/4 for all end connections 1/4 for all end connections VI - Fluorocarbon FKM BU - Buna N EP - EPDM 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-SK-1/4-VI-OC NE - Polychloroprene (CR) 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-900, Rev.11, January 2015 286 RELIEF VALVES H-900 SERIES

HIGH-PRESSURE RELIEF VALVES H-900HP SERIES

FEATURES n 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 GENERAL 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. 1 2 MATERIALS OF CONSTRUCTION 3 Item No. Components Qty. Valve Body Material 1 Cap Plug 1 PTFE 2 Label 1 Polyester 4 3 Adjustment Cap 1 St.St 316 4 Spring 1 St.St. 302,17-7PH 5 Lower Spring Button 1 St.St 316 6 Locking Nut 1 St.St 316 5 7 Bonnet 1 St.St 316 8 O-Ring 1 Fluorocarbon FKM 6 9 Quad Ring 1 Fluorocarbon FKM 10 Retaining Ring 1 PH15-7Mo 11 Poppet 1 St.St 316 12 Clamps Screw 1 St.St 316 13 O-Ring 1 Fluorocarbon FKM 14 Insert 1 St.St 316 7 15 Body 1 St.St 316 STANDARD CONFIGURATION DIMENSIONS 8 Connection / size Dimensions Description A B C D inlet outlet mm inch mm inch mm inch mm inch H-900HP 1/4 LET-LOK 1/4 LET-LOK 37 1.45 39 1.53 50 1.97 96.0 3.78 H-900HP 6MM LET-LOK 6MM LET-LOK 37 1.45 39 1.53 50 1.97 96.0 3.78 H-985HP 1/4 Male NPT 1/4 Female NPT 32 1.26 30 1.18 40 1.57 88.6 3.49 H-995HP 1/4 Male NPT 1/4 LET-LOK 32 1.26 39 1.53 50 1.97 88.6 3.49 9 10 11 12 13 14 Lock Wire Holes D 15 A B C 288 HIGH-PRESSURE RELIEF VALVES H-900HP SERIES

CLEANING & PACKAGING 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. TESTING 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 50-350 3.4-24 A White 350-750 24-51.5 B Blue 750-1500 51.5-103 C Gold 1500-2250 103-155 D Turquoise 2250-3000 155-206 E Green 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 H-900HP Size: 1/4" Seal Meterial Fluorocarbon FKM Buna N Polychloroprene (CR) EPDM TEMP MAX SET PRESSURE psig (bar) C ( F) -40 (-40) - -34 (-30) - -23 (-10) - - -18 (0) -12 (10) 6000 6000-4 (25) (413) (413) 6000-1 (30) (413) 6000 10 (50) (413) 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) 135 (275) - - 4700 (324) - 148 (300) SETTING AND RESEALING PRESSURE n 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. n Blocked upstream set pressure is the first indicator of a stopped flow process and is always lower than the set pressure. n Lubricant free cleaned valves have higher reseal pressure. H-900HP RESEAL PRESSURE Series H-900HP Test Set Pressure psig (bar) Min Resealing Pressure as a Percentage of set pressure, % 100-200 (6.8 to 13.7) 50 850-1000 (58.5 to 68.9) 84 HAM-LET ADVANCED CONTROL TECHNOLOGY 289

FLOW DATA AT 70 F (20ºC) Orifice in fully open mode is 3.6mm (0.14 inch) A SPRING 50-350psig B SPRING 350-750psig AIR FLOW WATER FLOW Air Flow (SLPM) Water Flow (LPM) 0 500 1000 1500 2000 2500 1000 70 1000 0 1 2 3 4 5 6 7 70 Inlet Pressure (Psig) 800 600 400 200 700 psi 550 psi 400 psi 300 psi 150 psi 50 psi 55 41 27 14 Inlet Pressure (bar) Pressure Drop (Psi) 800 600 400 200 700 psi 550 psi 400 psi 300 psi 150 psi 50 psi 55 41 27 14 Pressure Drop (bar) 0 0 10 20 30 40 50 60 70 80 90 100 0 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 Air Flow (SCFM) Water Flow (US.GPM) C SPRING 750-1500psig AIR FLOW D SPRING 1500-2250psig WATER FLOW Inlet Pressure (Psig) Air Flow (SLPM) 0 500 1000 1500 2000 2500 2400 165 2000 1600 1200 2000 psi 1600 psi 1400 psi 1000 psi 800 psi 138 110 83 800 55 0 10 20 30 40 50 60 70 80 90 100 Air Flow (SCFM) Inlet Pressure (bar) Pressure Drop (Psi) Water Flow (LPM) 0 0.2 0.4 0.6 0.8 1.0 2400 165 2000 1600 1200 2000 psi 1600 psi 1400 psi 1000 psi 800 psi 138 110 83 800 55 0 0.04 0.08 0.12 0.16 0.2 0.24 0.28 0.32 Water Flow (US.GPM) Pressure Drop (bar) 290 HIGH-PRESSURE RELIEF VALVES H-900HP SERIES

FLOW DATA AT 70 F (20ºC) Orifice in fully open mode is 3.6mm (0.14 inch) E SPRING 2250-3000psig F SPRING 3000-4000psig AIR FLOW WATER FLOW Air Flow (SLPM) 0 500 1000 1500 2000 2500 4500 310 Water Flow (LPM) 0 0.2 0.4 0.6 0.8 1.0 4500 310 Inlet Pressure (Psig) 4000 3500 3000 3800 psi 3200 psi 2800 psi 2500 psi 275 240 206 Inter Pressure (bar) Pressure Drop (Psi) 4000 3500 3000 3800 psi 3200 psi 2800 psi 2500 psi 275 240 206 Pressure Drop (bar) 2500 172 0 10 20 30 40 50 60 70 80 90 100 Air Flow (SCFM) 2500 0 0.04 0.08 0.12 0.16 0.2 0.24 0.28 Water Flow (US.GPM) 172 0.32 G SPRING 4000-5000psig AIR FLOW H SPRING 5000-6000psig WATER FLOW Inlet Pressure (Psig) 6000 5600 5200 4800 4400 Air Flow (SLPM) 0 100 200 300 400 500 5500 psi 4800 psi 4200 psi 413 386 359 330 303 Inter Pressure (bar) Pressure Drop (Psi) 6200 5800 5400 5000 4600 Water Flow (LPM) 0 0.2 0.4 0.6 0.8 1.0 5500 psi 4800 psi 4200 psi 427 400 372 345 317 Pressure Drop (bar) 4000 0 2 4 6 8 10 12 14 16 18 20 276 4200 0 0.04 0.08 0.12 0.16 0.2 0.24 0.28 0.32 290 Air Flow (SCFM) Water Flow (US.GPM) HAM-LET ADVANCED CONTROL TECHNOLOGY 291

APPLICATIONS 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 ORDERING INFORMATION OPERATION 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. OPTIONAL H - 9 00 - HP - SS - L - 1/4 - A - - - Valve Series Body Material End Connection Size Seal Material Valve Type 00 - LET-LOK Ends 85 - Male to Female End 95 - Male to LET-LOK End Includes: Spring (specific to desired set pressure range) and label. SS - 316 St.St. End Connection L - LET-LOK N - NPT R - ISO Tapered NL - NPT to LET-LOK For other end connections, please contact HAM-LET representative. ORDERING INFORMATION FOR SPARE KITS SPRING KIT 1/4 6MM Spring Designator A, B, C, D, E, F, G, H See table: "NOMINAL CRACKING PRESSURE RANGE" Factory Calibration Designator 50-6000 Psi Example: H-900-HP-SS-L-1/4-A120 Will be Calibrated to 120 Psi SEAL KIT Includes: O-Rings and label BLANK - Fluorocarbon FKM BU - Buna N EP - EPDM NE - Polychloroprene (CR) CE/PED Certification BLANK - Standard testing CE - Certification PED 97/23/EC Treatment BLANK - Standard Cleaning & Passivation OC - Oxygen Clean LF - Lubricant Free Z - 900 - HP - SPK - 1/4 - A Z - 900 - HP - SK - 1/4 - VI Body Designator per End Connection 1/4 for all end connections Spring Designator A, B, C, D, E, F, G, H 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. Body Designator per End Connection 1/4 for all end connections Seal Material VI - Fluorocarbon FKM BU - Buna N EP - EPDM NE - Polychloroprene (CR) H-900HP, Rev.10, January 2015 292 HIGH-PRESSURE RELIEF VALVES H-900HP SERIES