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Generant
1/4" MNPT Generant Cryogenic Relief Valve - 10PSI, 22PSI, 35PSI, 50 PSI, 100PSI, 150PSI, 200PSI, 250PSI -196°C to 176°C
in Valves
$59.00 - $59.95
In stockPrice varies by Pressure Rating.
Generant cryogenic relief valve with a 1/4″ MNPT connection, listed for service from -196 °C to 176 °C. Eight pressure ratings are stocked – 10, 22, 35, 50, 100, 150, 200 and 250 PSI – each supplied as a separate variant. Relief valves on cryogenic vessels and transfer lines vent the pressure rise produced when trapped liquid boils off to gas, so the rating has to be matched to the equipment being protected rather than chosen for convenience.
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Description
Cryogenic relief valve manufactured by Generant, with a 1/4″ MNPT (male NPT) process connection. The listing covers service from -196 °C to 176 °C; -196 °C is the atmospheric boiling point of liquid nitrogen, which is the lower bound most cryogenic service actually sees.
Eight pressure ratings are offered and each is a separate variant: 10, 22, 35, 50, 100, 150, 200 and 250 PSI. One rating is supplied per unit, so the set point is chosen at the point of order rather than adjusted afterwards.
A relief valve on a cryogenic line or dewar exists to handle the volume increase when trapped liquid warms and vaporises. Liquid cannot be isolated between two closed valves without a relief path, which is why short sections of cryogenic pipework are commonly fitted with their own relief device. Selecting the rating is an engineering decision about the vessel or line being protected – the valve does not make that decision for you.
The listing does not state the body material, orifice size, flow capacity at relief or any third-party approval. If your specification depends on those, or on a manufacturer test certificate for the set pressure, ask us to confirm before ordering.
Frequently asked questions
What pressure ratings are available?+
Eight: 10, 22, 35, 50, 100, 150, 200 and 250 PSI. Each is a separate variant, so one rating is supplied per unit. If you need more than one set point, order the corresponding variants separately.
What is the process connection?+
1/4" MNPT - a male NPT tapered thread. NPT seals on the thread engagement itself, so the joint needs a thread sealant or tape rated for your service temperature and media; a sealant chosen for ambient plumbing may not be appropriate at cryogenic temperature.
What temperature range is the valve listed for?+
-196 °C to 176 °C. The lower figure corresponds to the atmospheric boiling point of liquid nitrogen; the upper figure allows for the valve sitting in ambient or warmed sections of the same system.
Can the set pressure be changed after purchase?+
No adjustment is offered through this listing - the rating is fixed per variant. If you need a different set point, order that variant. Any re-rating, re-testing or recertification is outside the scope of what we supply.
Is a test certificate or set-pressure documentation included?+
The listing does not include documentation of set-pressure testing, and we do not issue one. If your quality system requires a manufacturer certificate, contact us before ordering so we can confirm what the unit actually ships with.
What is the body material and flow capacity?+
Neither is stated in the source listing, so we do not quote them. Where material of construction or relief capacity is part of your specification, tell us the requirement before you order and we will confirm rather than guess.
