Cryogenic Regulating Valves

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51 Products

Long-Life Pressure-Regulating Valves for Cryogenic Liquids

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.

	Inlet			Outlet
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	End-to-End Lg.	For Use With	Temp. Range, ° F	Choose an Outlet Pressure, psi		Each
NPT Female







				Bronze Body—Bronze Diaphragm and PTFE Seal with Internal Strainer

				1/4	Side	400	1/4	Side	Screw	3 1/16"	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 150	10 to 30, 75 to 250	49165K39	0000000


				1/2	Side	400	1/2	Side	Screw	4 1/2"	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 150	10 to 30, 20 to 75, 20 to 100, 50 to 250	49165K59	000000
				1	Side	400	1	Side	Screw	5 7/8"	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 150	10 to 35, 20 to 60, 20 to 100, 75 to 250	49165K79	000000

Pressure-Regulating Valves for Cryogenic Liquids

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.

	Inlet			Outlet
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	End-to-End Lg.	For Use With	Temp. Range, ° F	Choose an Outlet Pressure, psi		Each
NPT Female







				Brass Body—Bronze Diaphragm and PTFE Seal

				1/4	Side	600	1/4	Side	Screw	1 3/4"	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 150	15 to 65, 75 to 175, 100 to 250	47435K31	0000000


				3/8	Side	600	3/8	Side	Screw	1 3/4"	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 150	15 to 65, 75 to 175, 100 to 250	47435K32	000000

Compact Threaded Flow-Adjustment Valves for Cryogenic Liquid

Often used with portable cryogenic cylinders, these valves are a third of the height of other valves for cryogenic liquid. They are designed to withstand the extreme cold of liquid argon, liquid carbon dioxide, and liquid nitrogen; all are cleaned and bagged to meet CGA G-4.1 standards for oxygen service. These valves gradually open and close with multiple turns of the wheel handle to adjust and regulate flow. They have a nonrising stem that stays in the same position whether the valve is open or closed.

Brass Body—Straight

Image of Product. Front orientation. Flow-Adjustment Valves. Compact Threaded Flow-Adjustment Valves for Cryogenic Liquid.

Flow Coefficient (Cv)—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.

				Overall
	Pipe Size	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Ht.	Lg.	Temp. Range, ° F	Seat Material	Packing Material	End-to-End Lg.	Stem Type	For Use With	Valve Type	Specs. Met		Each
NPT Female × NPT Female



		1/4	1	600 psi @ 165° F	3 1/4"	2 1/2"	-320 to 165	PCTFE	PTFE	2 1/2"	Nonrising	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen	Globe	CGA G-4.1	68075K81	0000000


		3/8	1.8	600 psi @ 165° F	3 1/4"	2 1/2"	-320 to 165	PCTFE	PTFE	2 1/2"	Nonrising	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen	Globe	CGA G-4.1	68075K82	000000
		1/2	1.8	600 psi @ 165° F	3 1/4"	2 1/2"	-320 to 165	PCTFE	PTFE	2 1/2"	Nonrising	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen	Globe	CGA G-4.1	68075K83	000000

Threaded Flow-Adjustment Valves for Cryogenic Liquid

Designed to withstand the extreme cold of liquid argon, liquid carbon dioxide, and liquid nitrogen, these valves are cleaned and bagged to meet CGA G-4.1 standards for oxygen service. They gradually open and close with multiple turns of the wheel handle to adjust and regulate flow. All have a rising stem that lifts as the valve opens and lowers as the valve closes to provide a visual indication of whether flow is on or off.

Bronze Body—Straight

Image of Product. Front orientation. Flow-Adjustment Valves. Threaded Flow-Adjustment Valves for Cryogenic Liquid.

				Overall
	Pipe Size	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Ht.	Lg.	Temp. Range, ° F	Seal Material	Seat Material	Packing Material	End-to-End Lg.	Stem Type	For Use With	Valve Type	Specs. Met		Each
NPT Female × NPT Female



		1/2	3.3	600 psi @ 150° F	8 5/16"	2 5/8"	-325 to 150	Glass-Filled PTFE	PTFE	PTFE	2 5/8"	Rising	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen	Globe	CGA G-4.1	49415K32	0000000


		3/4	6.3	400 psi @ 150° F	10"	3 3/16"	-325 to 150	Glass-Filled PTFE	PTFE	PTFE	3 3/16"	Rising	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen	Globe	CGA G-4.1	49415K43	000000
		1	10	600 psi @ 150° F	11 13/16"	3 3/4"	-325 to 150	Glass-Filled PTFE	PTFE	PTFE	3 3/4"	Rising	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen	Globe	CGA G-4.1	49415K34	000000
		1 1/2	26	400 psi @ 150° F	16 1/2"	4 3/4"	-325 to 150	Glass-Filled PTFE	PTFE	PTFE	4 3/4"	Rising	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen	Globe	CGA G-4.1	49415K36	000000
		2	45	600 psi @ 150° F	16 3/4"	5 3/4"	-325 to 150	Glass-Filled PTFE	PTFE	PTFE	5 3/4"	Rising	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen	Globe	CGA G-4.1	49415K38	00000000

Stainless Steel Body

				Overall
	Pipe Size	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Ht.	Lg.	Temp. Range, ° F	Seal Material	Seat Material	Packing Material	End-to-End Lg.	Stem Type	For Use With	Valve Type	Specs. Met		Each
NPT Female × NPT Female



		1/2	5	720 psi @ 150° F	11 13/16"	4"	-325 to 150	Glass-Filled PTFE	PCTFE	PTFE	3 1/16"	Rising	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen	Globe	CGA G-4.1	49415K42	0000000


		1	14	720 psi @ 150° F	12 1/16"	4"	-325 to 150	Glass-Filled PTFE	PCTFE	PTFE	3 15/16"	Rising	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen	Globe	CGA G-4.1	49415K44	000000
		1 1/2	53	720 psi @ 150° F	12 5/16"	5"	-325 to 150	Glass-Filled PTFE	PCTFE	PTFE	5"	Rising	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen	Globe	CGA G-4.1	49415K46	000000
		2	28.3	720 psi @ 150° F	12 5/8"	5"	-325 to 150	Glass-Filled PTFE	PCTFE	PTFE	5 15/16"	Rising	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen	Globe	CGA G-4.1	49415K48	00000000

Fast-Acting Pressure-Relief Valves for Cryogenic Liquids

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.

NPT Male Inlet and Relief Vent

Inlet
Pipe Size	Location	Max. Pressure, psi	Relief Port Location	Shape	Overall Ht.	For Use With	Temp. Range, ° F	Valve Type	Choose a Set Pressure, psi		Each







			Brass Body—PTFE Seal

			1/4	Bottom	400	Side	90° Elbow	2 5/16"	Liquid Argon, Liquid Nitrogen, Liquid Oxygen	-320 to 350	Pop Safety	5, 10, 15, 20, 25, 30, 40, 50, 88, 100, 110, 125, 150, 200, 220, 250, 300, 325, 350, 400	9137K11	000000

Flanged Flow-Adjustment Valves for Chemicals

With seats that can stand up to aggressive and corrosive solutions, these valves are often used in chemical-processing applications. They bolt to flanges for adjusting and regulating flow in flanged pipelines.

Wafer Valves with Lockable Lever Handle


4 Bolt Holes	8 Bolt Holes

Wafer valves must be sandwiched between two flanges; they have tabs or unthreaded holes to help align the valve between the flanges.

Lockable lever handles have 10 flow-adjustment positions. The handle can be fixed in place with a padlock (not included).

	For Use With	For Max. Shackle Dia.	Pressure Class	Flange OD	Bolt Circle Dia.	No. of Bolt Holes	Bolt Hole Size	Bolts Included	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Temp. Range, ° F	End-to-End Lg.	Valve Type	Seat Material	Specs. Met		Each
Ductile Iron Body—316 Stainless Steel Disc



	2	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	1/4"	125, 150	6"	4 3/4"	4	3/4"	No	Not Rated	250 psi @ 210° F	-20 to 210	1 13/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K24	0000000


	2 1/2	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	1/4"	125, 150	7"	5 1/2"	4	3/4"	No	Not Rated	250 psi @ 210° F	-20 to 210	1 15/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K25	000000
	3	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	1/4"	125, 150	7 1/2"	6"	4	3/4"	No	Not Rated	250 psi @ 210° F	-20 to 210	1 15/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K26	000000
	4	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	1/4"	125, 150	9"	7 1/2"	8	3/4"	No	Not Rated	250 psi @ 210° F	-20 to 210	2 3/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K27	000000
	5	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	1/4"	125, 150	10"	8 1/2"	8	7/8"	No	Not Rated	250 psi @ 210° F	-20 to 210	2 5/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K28	00000000
	6	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	1/4"	125, 150	11"	9 1/2"	8	7/8"	No	Not Rated	250 psi @ 210° F	-20 to 210	2 5/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K29	00000000

Wafer Valves with Wheel Handle

Wafer valves must be sandwiched between two flanges; they have tabs or unthreaded holes to help align the valve between the flanges.

Wheel handles open and close with multiple turns, providing fully adjustable flow.

	For Use With	Pressure Class	Flange OD	Bolt Circle Dia.	No. of Bolt Holes	Bolt Hole Size	Bolts Included	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Temp. Range, ° F	End-to-End Lg.	Valve Type	Seat Material	Specs. Met		Each
Ductile Iron Body—316 Stainless Steel Disc



	6	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	125, 150	11"	9 1/2"	8	7/8"	No	Not Rated	250 psi @ 210° F	-20 to 210	2 5/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K54	000000000


	8	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	125, 150	13 1/2"	11 3/4"	8	7/8"	No	Not Rated	250 psi @ 210° F	-20 to 210	2 1/2"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K55	00000000

Lug Valves with Lockable Lever Handle


4 Bolt Holes	8 Bolt Holes

Lug valves can be sandwiched between two flanges or bolted directly to a single flange for servicing one end of the pipeline without depressurizing the other side. They have threaded flange holes with a hole pattern that matches ANSI flanges of the same pipe size.

Lockable lever handles have 10 flow-adjustment positions. The handle can be fixed in place with a padlock (not included).

	For Use With	For Max. Shackle Dia.	Pressure Class	Flange OD	Bolt Circle Dia.	No. of Bolt Holes	Bolt Hole Size	Bolts Included	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Temp. Range, ° F	End-to-End Lg.	Valve Type	Seat Material	Specs. Met		Each
Ductile Iron Body—316 Stainless Steel Disc



	2	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	1/4"	125, 150	6"	4 3/4"	4	3/4"	No	Not Rated	250 psi @ 210° F	-20 to 210	1 13/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K71	0000000


	2 1/2	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	1/4"	125, 150	7"	5 1/2"	4	3/4"	No	Not Rated	250 psi @ 210° F	-20 to 210	1 15/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K72	000000
	3	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	1/4"	125, 150	7 1/2"	6"	4	3/4"	No	Not Rated	250 psi @ 210° F	-20 to 210	1 15/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K73	000000
	4	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	1/4"	125, 150	9"	7 1/2"	8	3/4"	No	Not Rated	250 psi @ 210° F	-20 to 210	2 3/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K74	000000
	5	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	1/4"	125, 150	10"	8 1/2"	8	7/8"	No	Not Rated	250 psi @ 210° F	-20 to 210	2 5/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K75	00000000
	6	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	1/4"	125, 150	11"	9 1/2"	8	7/8"	No	Not Rated	250 psi @ 210° F	-20 to 210	2 5/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K76	00000000

Lug Valves with Wheel Handle

Wheel handles open and close with multiple turns, providing fully adjustable flow.

	For Use With	Pressure Class	Flange OD	Bolt Circle Dia.	No. of Bolt Holes	Bolt Hole Size	Bolts Included	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Temp. Range, ° F	End-to-End Lg.	Valve Type	Seat Material	Specs. Met		Each
Ductile Iron Body—316 Stainless Steel Disc



	6	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	125, 150	11"	9 1/2"	8	7/8"	No	Not Rated	250 psi @ 210° F	-20 to 210	2 5/16"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K2	000000000


	8	Carbon Dioxide, Gasoline, Liquid Carbon Dioxide, Phosphoric Acid	125, 150	13 1/2"	11 3/4"	8	7/8"	No	Not Rated	250 psi @ 210° F	-20 to 210	2 1/2"	Butterfly	Fluoroelastomer	API Std 609, MSS SP-67	5024K3	00000000

Orifice Valves for Chemicals

Made of PVC, these orifices have excellent resistance to a wide range of corrosive chemicals. Also known as flow restrictors and precision orifice valves, they are used to throttle, vent, bleed, or regulate the flow of liquids and gases. They automatically adjust to changing inlet pressure to maintain consistent outlet flow.

PVC Body

Image of Product. Front orientation. Orifice Valves. Orifice Valves for Chemicals.

	Temp. Range, ° F	Choose an Outlet Water Flow		Each
NPT Female × NPT Female







	1/2 Pipe Size

	2 1/4"	Air, Ammonia, Beverage, Carbon Dioxide, Diesel Fuel, Ethylene Glycol, Food, Hydrochloric Acid, Kerosene, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Nitric Acid, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Water	120 psi @ 75° F	40 to 140	0.25 gpm, 0.5 gpm, 0.75 gpm, 1 gpm, 1.5 gpm, 2 gpm	2272N53	0000000




			3/4 Pipe Size

			3 1/4"	Air, Ammonia, Beverage, Carbon Dioxide, Diesel Fuel, Ethylene Glycol, Food, Hydrochloric Acid, Kerosene, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Nitric Acid, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Water	120 psi @ 75° F	40 to 140	3 gpm, 4 gpm, 5 gpm, 6 gpm, 7 gpm, 8 gpm	2272N3	000000

Vacuum Breakers 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-breaking valves, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.

Diaphragm Check Valve

								Material			CPVC Body				PVC Body
	Inlet Pipe Size	Outlet Pipe SIze	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	End-to-End Lg.	Seal	DIaphragm	For Use With	Temp. Range, ° F	Color		Each	Temp. Range, ° F	Color		Each
NPT Female Inlet × NPT Female Outlet



		1/2	1/2	80	Not Rated	100 psi @ 75° F	1	4 5/16"	Fluoroelastomer	Fluoroelastomer	Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon	40 to 180	Light Gray	1868N13	0000000	40 to 140	Gray	1868N1	0000000


		3/4	3/4	80	Not Rated	100 psi @ 75° F	1	4 5/8"	Fluoroelastomer	Fluoroelastomer	Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon	40 to 180	Light Gray	1868N14	000000	40 to 140	Gray	1868N11	000000
		1	1	80	Not Rated	100 psi @ 75° F	1	5 1/8"	Fluoroelastomer	Fluoroelastomer	Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon	40 to 180	Light Gray	1868N15	000000	40 to 140	Gray	1868N12	000000

Spring-Loaded Piston Check Valve

								Material				CPVC Body				PVC Body
	Inlet Pipe Size	Outlet Pipe SIze	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	End-to-End Lg.	Seal	Piston	Spring	For Use With	Temp. Range, ° F	Color		Each	Temp. Range, ° F	Color		Each
NPT Female Inlet × NPT Female Outlet



		1 1/2	1 1/2	80	Not Rated	100 psi @ 75° F	1	7 15/16"	Fluoroelastomer	CPVC	Polymer	Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon	40 to 180	Light Gray	1868N18	0000000	—	—	———	0


		2	2	80	Not Rated	100 psi @ 75° F	1	8 1/2"	Fluoroelastomer	PVC	Polymer	Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon	—	—	———	0	40 to 140	Gray	1868N17	0000000

Pressure-Relief Valves for Cryogenic Applications

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.

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

	Valves											Riser Tubes		Adapters
	Inlet			Relief
	Pipe Size	Location	Max. Pressure, psi	Port Thread Size	Port Location	Overall Ht.	For Use With	Temp. Range, ° F	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"	Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 165	22, 35, 50, 75, 100, 125, 150, 200, 250, 300, 350, 400, 450	49315K71	000000	49315K97	000000	49315K94	000000


				3/8	Bottom	600	3/4"-20	Top	2 5/8"	Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 165	22, 35, 50, 75, 100, 125, 150, 200, 250, 300, 350, 400, 450	49315K72	00000	49315K98	00000	49315K94	00000
				1/2	Bottom	600	3/4"-20	Top	2 13/16"	Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 165	22, 35, 50, 75, 100, 125, 150, 200, 250, 300, 350, 400, 450	49315K73	00000	49315K98	00000	49315K96	00000