Cryogenic Pressure Regulators

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21 Products

About Pressure-Relief Valves

About Backflow-Prevention Valves

For Use With: Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen
Temperature Range: -320° to 150° F

For a longer service life than standard valves for cryogenic liquids, these have a durable bronze body. All are cleaned and bagged for oxygen service and other high-purity applications. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Valves are designed to withstand the extreme cold of liquid argon, liquid carbon dioxide, liquid nitrogen, and liquid oxygen. They have an internal strainer to trap debris.

For technical drawings and 3-D models, click on a part number.

Inlet			Outlet
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	End-to-End Lg.	Choose an Outlet Pressure Range, psi		Each
NPT Female
Bronze Body—Bronze Diaphragm and PTFE Seal with Internal Strainer
1/4	Side	400	1/4	Side	3 1/16"	10 to 30, 75 to 250	00000000	0000000
1/2	Side	400	1/2	Side	4 1/2"	10 to 30, 20 to 75, 20 to 100, 50 to 250	00000000	000000
1	Side	400	1	Side	5 7/8"	10 to 35, 20 to 60, 20 to 100, 75 to 250	00000000	00000000

Pressure-Regulating Valves for Cryogenic Liquids

For Use With: Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen
Temperature Range: -320° to 150° F

These valves can withstand the extreme cold of liquid argon, liquid carbon dioxide, liquid nitrogen, and liquid oxygen. All are cleaned and bagged for oxygen service and other high-purity applications. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range.

For technical drawings and 3-D models, click on a part number.

Inlet			Outlet
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	End-to-End Lg.	Choose an Outlet Pressure Range, psi		Each
NPT Female
Brass Body—Bronze Diaphragm and PTFE Seal
1/4	Side	600	1/4	Side	1 3/4"	15 to 65, 75 to 175, 100 to 250	00000000	0000000
3/8	Side	600	3/8	Side	1 3/4"	15 to 65, 75 to 175, 100 to 250	00000000	000000

Fast-Acting Pressure-Relief Valves for Cryogenic Liquids

For Use With: Liquid Argon, Liquid Nitrogen, Liquid Oxygen
Temperature Range: -320° to 350° F

Cleaned and bagged for oxygen service and other high-purity applications, these valves can withstand the extreme cold of liquid argon, liquid nitrogen, and liquid oxygen. They spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. All have a vented relief port to exhaust discharge directly.

For technical drawings and 3-D models, click on a part number.

Inlet
Pipe Size	Location	Maximum Pressure, psi	Relief Port Location	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
NPT Male Inlet and Relief Vent
Brass Body—PTFE Seal
1/4	Bottom	400	Side	2 5/16"	Pop Safety	5, 10, 15, 20, 25, 30, 40, 50, 88, 100, 110, 125, 150, 200, 220, 250, 300, 325, 350, 400	0000000	000000

Pressure-Relief Valves for Cryogenic Applications

For Use With: Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen
Temperature Range: -320° to 165° F

Cleaned and bagged to meet CGA G-4.1 for oxygen service and other high-purity applications, these valves are built to withstand the extreme cold of liquid carbon dioxide, liquid nitrogen, and liquid oxygen. They begin opening at the set pressure and fully open at about 10% over the set pressure. Valves begin closing as pressure drops and fully close when the system pressure is restored below the set pressure. Set pressure is not adjustable.

Valves are not intended for direct contact with cryogenic liquids. Risers (sold separately) are required to convert cryogenic liquids into gases before they contact the valve. 3/8 NPT valve requires a 1/2 NPT × 3/8 NPT bushing when using a riser.

Adapters (sold separately) convert the valve relief-port connection from UNEF female threads to NPT female threads.

For technical drawings and 3-D models, click on a part number.

Valves
Inlet			Relief Port						Risers		Adapters
Pipe Size	Location	Maximum Pressure, psi	Thread Size	Location	Overall Ht.	Choose a Set Pressure, psi		Each		Each		Each
NPT Male Inlet and UNEF Female Relief Port
Brass Body
1/4	Bottom	600	3/4"-20	Top	2 5/8"	22, 35, 50, 75, 100, 125, 150, 200, 250, 300, 350, 400, 450	00000000	000000	00000000	000000	00000000	000000
3/8	Bottom	600	3/4"-20	Top	2 5/8"	22, 35, 50, 75, 100, 125, 150, 200, 250, 300, 350, 400, 450	00000000	00000	00000000	00000	00000000	00000
1/2	Bottom	600	3/4"-20	Top	2 13/16"	22, 35, 50, 75, 100, 125, 150, 200, 250, 300, 350, 400, 450	00000000	00000	00000000	00000	00000000	00000

Vacuum-Breaking Valves for Chemicals

A plastic body withstands pH neutralizing, cleaning, and plating solutions containing sodium hydroxide, methyl ethyl ketone, and other harsh chemicals. Also known as vacuum breakers, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.

For technical drawings and 3-D models, click on a part number.

Diaphragm

For Use With: Air, Ammonia, Argon, Beverage, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Food, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol, Methyl Ethyl Ketone, Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide, Sodium Hypochlorite, Water, Xenon
Diaphragm Material: Fluoroelastomer Rubber
Seal Material: Fluoroelastomer Rubber

PVC Plastic Body
Pipe Size	For Pipe Schedule	Max. Pressure	Min. Opening Pressure, psi	End-to-End Lg.	Color	Temperature Range, °F		Each
NPT Female × NPT Female
1/2	80	100 psi @ 75° F	1	4 5/16"	Gray	40° to 140°	000000	0000000
3/4	80	100 psi @ 75° F	1	4 5/8"	Gray	40° to 140°	0000000	000000
1	80	100 psi @ 75° F	1	5 1/8"	Gray	40° to 140°	0000000	000000
CPVC Plastic Body
NPT Female × NPT Female
1/2	80	100 psi @ 75° F	1	4 5/16"	Light Gray	40° to 180°	0000000	000000
3/4	80	100 psi @ 75° F	1	4 5/8"	Light Gray	40° to 180°	0000000	000000
1	80	100 psi @ 75° F	1	5 1/8"	Light Gray	40° to 180°	0000000	000000

Spring-Loaded Piston

For Use With: Air, Ammonia, Argon, Beverage, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Food, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol, Methyl Ethyl Ketone, Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide, Sodium Hypochlorite, Water, Xenon
Piston Material:
PVC Plastic Body: PVC Plastic
CPVC Plastic Body: CPVC Plastic
Spring Material: Plastic Polymer
Seal Material: Fluoroelastomer Rubber

PVC Plastic Body
Pipe Size	For Pipe Schedule	Max. Pressure	Min. Opening Pressure, psi	End-to-End Lg.	Color	Temperature Range, °F		Each
NPT Female × NPT Female
2	80	100 psi @ 75° F	1	8 1/2"	Gray	40° to 140°	0000000	0000000
CPVC Plastic Body
NPT Female × NPT Female
1 1/2	80	100 psi @ 75° F	1	7 15/16"	Light Gray	40° to 180°	0000000	000000

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About Pressure-Relief Valves

About Backflow-Prevention Valves

Extended-Life Pressure-Regulating Valves for Cryogenic Liquids

Pressure-Regulating Valves for Cryogenic Liquids

Fast-Acting Pressure-Relief Valves for Cryogenic Liquids

Pressure-Relief Valves for Cryogenic Applications

Vacuum-Breaking Valves for Chemicals