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About Pressure-Relief Valves
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About Actuated On/Off Valves
More
Solenoid On/Off Valves for Cryogenic Liquids
Built to withstand the extreme cold of liquid nitrogen and liquid oxygen, these valves are cleaned and bagged for high-purity applications. They operate on electricity to automatically start and stop flow.
All valves are normally closed unless actuated. The actuator is directly mounted to the valve body to minimize movement and reduce wear.
304 stainless steel valves are more corrosion resistant than brass and bronze valves.
Zero pressure drop valves don’t require a minimum pressure drop between the inlet and outlet for operation. Pressure drop assisted valves require a minimum pressure drop between the inlet and the outlet for operation; the upstream pressure must be greater than the downstream pressure.
NEMA 2 valves resist light splashing water and dust, and their enclosures are rated IP50 for additional protection from dust. Valves rated NEMA 4 and IP65 resist dust, splashing water, and washdowns.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
For technical drawings and 3-D models, click on a part number.

- For Use With: Liquid Argon, Liquid Nitrogen, Liquid Oxygen
- Seal Material: PTFE Plastic
Pipe Size | Gender | Thread Type | Flow Coefficient (Cv) | Max. Pressure | Pressure Drop | Temp. Range, °F | Valve Lg. | O'all Ht. | Environmental Rating | Each | |
Normally Closed—120V AC | |||||||||||
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1/4 | Female | NPT | 0.7 | 120 psi @ 70° F | Zero Pressure Drop | -320° to 355° | 1 3/4" | 3 1/8" | IP50, NEMA 2 | 00000000 | 0000000 |
3/8 | Female | NPT | 3.5 | 125 psi @ 70° F | Pressure Drop Assisted | -320° to 355° | 2 1/2" | 4 7/8" | IP50, NEMA 2 | 00000000 | 000000 |

- For Use With: Liquid Argon, Liquid Nitrogen, Liquid Oxygen
- Seal Material: Glass-Filled PTFE Plastic
Pipe Size | Gender | Thread Type | Flow Coefficient (Cv) | Max. Pressure | Pressure Drop | Temp. Range, °F | Valve Lg. | O'all Ht. | Each | |
Normally Closed—24V AC | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
1/2 | Female | NPT | 3.5 | 110 psi @ -350° F | Zero Pressure Drop | -350° to 400° | 3 1/4" | 7" | 0000000 | 0000000 |
3/4 | Female | NPT | 7.5 | 110 psi @ -350° F | Zero Pressure Drop | -350° to 400° | 3 1/2" | 7 1/8" | 0000000 | 000000 |
1 | Female | NPT | 13 | 110 psi @ -350° F | Zero Pressure Drop | -350° to 400° | 4 1/8" | 8" | 0000000 | 000000 |
Normally Closed—24V DC | ||||||||||
1/2 | Female | NPT | 3.5 | 110 psi @ -350° F | Zero Pressure Drop | -350° to 400° | 3 1/4" | 7" | 0000000 | 000000 |
1 | Female | NPT | 13 | 110 psi @ -350° F | Zero Pressure Drop | -350° to 400° | 4 1/8" | 8" | 0000000 | 000000 |
Normally Closed—120V AC | ||||||||||
1/2 | Female | NPT | 3.5 | 110 psi @ -350° F | Zero Pressure Drop | -350° to 400° | 3 1/4" | 7 1/16" | 0000000 | 000000 |
1/2 | Female | NPT | 3.5 | 200 psi @ -350° F | Zero Pressure Drop | -350° to 400° | 3 1/4" | 7 1/16" | 0000000 | 000000 |
3/4 | Female | NPT | 7.5 | 110 psi @ -350° F | Zero Pressure Drop | -350° to 400° | 3 1/2" | 7 3/8" | 0000000 | 000000 |
1 | Female | NPT | 13 | 110 psi @ -350° F | Zero Pressure Drop | -350° to 400° | 4 1/8" | 8 1/8" | 0000000 | 000000 |

- For Use With: Liquid Nitrogen, Liquid Oxygen
- Seal Material: PTFE Plastic
Pipe Size | Gender | Thread Type | Flow Coefficient (Cv) | Max. Pressure | Pressure Drop | Temp. Range, °F | Valve Dia. | O'all Ht. | Environmental Rating | Each | |
Normally Closed—120V AC | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
1/4 | Female | NPT | 0.9 | 225 psi @ 120° F | Pressure Drop Assisted | -320° to 120° | 1 11/16" | 4 13/16" | IP65, NEMA 4 | 0000000 | 0000000 |
3/8 | Female | NPT | 1.9 | 225 psi @ 120° F | Pressure Drop Assisted | -320° to 120° | 1 11/16" | 4 13/16" | IP65, NEMA 4 | 0000000 | 000000 |
1/2 | Female | NPT | 1.1 | 225 psi @ 120° F | Pressure Drop Assisted | -320° to 120° | 1 11/16" | 5 1/4" | IP65, NEMA 4 | 0000000 | 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.
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 | ||||||||||||
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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" | 00000000 | 000000 | 00000000 | 000000 | 00000000 | 000000 | |
3/8 | Bottom | 600 | 3/4"-20 | Top | 2 5/8" | 00000000 | 00000 | 00000000 | 00000 | 00000000 | 00000 | |
1/2 | Bottom | 600 | 3/4"-20 | Top | 2 13/16" | 00000000 | 00000 | 00000000 | 00000 | 00000000 | 00000 |
Extended-Life Pressure-Regulating Valves for Cryogenic Liquids

- 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 | |||||||
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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" | 00000000 | 0000000 | |
1/2 | Side | 400 | 1/2 | Side | 4 1/2" | 00000000 | 000000 | |
1 | Side | 400 | 1 | Side | 5 7/8" | 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.