Carbon Dioxide Pressure Regulating Valves

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For Use With

Argon/Carbon Dioxide Blend

Inlet Pipe Size

Outlet Pressure

Maximum Inlet Pressure

Less than 500 psi

500 psi to 999 psi

2,000 psi to 3,999 psi

Body Material

Inlet Thread Type

Minimum Temperature

Outlet Pipe Size

Valve Function

Maximum Temperature

Set Pressure

Shape

Outlet Connection Port

Inlet Connection

Maximum Outlet Pressure Gauge Measurement

Actuation

Inlet Connection Port

Valve Type

Pipe Size

Relief Port Pipe Size

Inlet Gender

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

Export Control Classification Number (ECCN)

2B999

EAR99

DFARS Specialty Metals

Outlet Connection

55 Products

About Backflow-Prevention Valves

About Pressure-Relief Valves

About Gas Regulators

About Air Preparation

For Use With:
Relieving: Air, Nitrogen
Nonrelieving: Air, Argon, Carbon Dioxide, Nitrogen
Temperature Range: 32° to 140° F

Maintain contaminant-free standards in clean room environments. These valves come cleaned and bagged to Fed. Spec. Class 100 and ISO Class 5 clean room standards and have a 316 stainless steel body with a smooth finish to resist dust collection. They automatically reduce a high, variable inlet pressure to a lower, stable output pressure. Valves have threads below the adjustment knob and come with a panel-mount nut. Adjust the outlet pressure within the range.

Gauge ports let you attach a pressure gauge.

Nonrelieving valves do not exhaust excess downstream pressure.

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

Nonrelieving

Regulators
Inlet			Outlet			Gauge Port							Mounting Brackets
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Range, psi	Pipe Size	Location	End-to-End Lg.	Panel Cutout Dia.	Environmental Rating		Each		Each
NPT Female
316 Stainless Steel Body—Fluoroelastomer Diaphragm and Seal
1/8	Side	145	1/8	Side	7 to 102	1/4	Side	1.700"	1.2"	Fed. Std. Class 100, ISO Class 5	0000000	0000000	0000000	00000
1/4	Side	145	1/4	Side	7 to 102	1/4	Side	1.700"	1.2"	Fed. Std. Class 100, ISO Class 5	0000000	000000	0000000	0000
1/4	Side	145	1/4	Side	7 to 102	1/4	Side	2.280"	1.44"	Fed. Std. Class 100, ISO Class 5	0000000	000000	0000000	00000
3/8	Side	145	3/8	Side	7 to 102	1/4	Side	2.280"	1.44"	Fed. Std. Class 100, ISO Class 5	0000000	000000	0000000	00000
1/2	Side	145	1/2	Side	7 to 102	1/4	Side	2.280"	1.44"	Fed. Std. Class 100, ISO Class 5	0000000	000000	0000000	00000

Pressure Gauge

0000000

Each

000000

Tank-Mount Pressure-Regulating Valves for Air and Inert Gas

For Use With: See Table
Temperature Range: -20° to 120° F

These valves automatically reduce a high inlet pressure from compressed gas tanks to a lower, stable outlet pressure. All have Compressed Gas Association (CGA) numbered inlet fittings for secure connections to compressed gas tanks. Choose a valve with the same CGA number as your tank and other system components. Valves have a gauge to monitor outlet pressure and a gauge to monitor inlet pressure from the tank.

Choose a valve with a maximum outlet pressure that’s approximately twice your application’s normal operating pressure. Your operating pressure should never exceed 75% of the valve’s maximum outlet pressure.

Single-stage valves reduce pressure in one step, which causes the outlet pressure to fluctuate slightly as you empty the tank. They’re best for applications where a constant outlet pressure isn’t critical.

Two-stage valves progressively reduce pressure over two steps for more consistent outlet pressure at all times. They’re often used in applications that require a constant outlet pressure regardless of the tank level.

Valves with a brass body have a longer service life than valves with a brass and steel body.

Valves with a stainless steel diaphragm can withstand harsh environments.

Single-Stage Valves

Female Oulet × Female Inlet Single-Stage Valve With Knob

Male Outlet × Female Inlet Single-Stage Valve With T-Handle

Inlet				Outlet				Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Location	Thread Direction	Pressure Range, psi	Pressure Adjustment Method	Body	Seal	Diaphragm		Each
For Use With Carbon Dioxide
5/8"-18 UNF Female Outlet × NGO Female Inlet
CGA 320	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 145	Knob	Brass	PTFE	Neoprene	00000000	0000000
9/16"-18 UNF Male Outlet × NGO Female Inlet
CGA 320	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Rubber	0000000	000000

Two-Stage Valves

Female Outlet × Female Inlet Two-Stage Valve With T-Handle

Inlet				Outlet				Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Location	Thread Direction	Pressure Range, psi	Pressure Adjustment Method	Body	Seal	Diaphragm		Each
For Use With Carbon Dioxide
1/4 NPT Female Outlet × NGO Female Inlet
CGA 320	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Neoprene	00000000	0000000
CGA 320	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Stainless Steel	00000000	000000
5/8"-18 UNF Female Outlet × NGO Female Inlet
CGA 320	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Stainless Steel	00000000	000000
CGA 320	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass/Steel	PTFE	Rubber	0000000	000000

High-Purity Tank-Mount Pressure-Regulating Valves for Inert Gas

For Use With: See Table
Temperature Range: -20° to 120° F

Reduce contaminants in research sample systems, emission monitoring systems, chromatography, and other high-purity applications that use argon, helium, nitrogen, or carbon dioxide. These valves have a 316 stainless steel and brass body with a smooth finish to reduce dust collection and internal components designed to protect the seal and diaphragm from contamination. They automatically reduce a high inlet pressure from compressed gas tanks to a lower, stable outlet pressure. All have Compressed Gas Association (CGA) numbered inlet fittings for secure connections to compressed gas tanks. Choose a valve with the same CGA number as your tank and other system components. Outlet fittings are Swagelok® for a leak-free seal around hard metal tubing in high-pressure lines. Also known as instrumentation fittings, Swagelok® fittings are compatible with Parker A-Lok, Gyrolok, Bilok, and Tylok fittings. Valves have a gauge to monitor outlet pressure and a gauge to monitor inlet pressure from the tank.

Chrome-plated valves add a layer of corrosion resistance.

For Use With Carbon Dioxide

Swagelok® Female Outlet × NGO Female Inlet (Brass)

Swagelok® Female Outlet × NGO Female Inlet (Chrome-Plated Brass)

Inlet					Outlet
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	For Tube OD	Location	Pressure Range, psi	Pressure Adjustment Method		Each
Swagelok® Female Outlet × NGO Female Inlet
Brass Body—316 Stainless Steel Diaphragm and PTFE Seal
CGA 320	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 15	Knob	0000000	0000000
CGA 320	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 125	Knob	0000000	000000
CGA 320	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 125	Knob	0000000	000000
Chrome-Plated Brass Body—316 Stainless Steel Diaphragm and PTFE Seal
CGA 320	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 15	Knob	0000000	000000
CGA 320	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 50	Knob	0000000	000000
CGA 320	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 15	Knob	0000000	000000
CGA 320	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 50	Knob	0000000	000000
CGA 320	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 125	Knob	0000000	000000

Easy-Read Tank-Mount Pressure-Regulating
Valves with Flowmeter for Inert Gas

Male Inlet × Female Outlet With One Flowmeter

Female Inlet × Female Outlet With One Flowmeter

Flowmeters let you see the gas flow rate from a distance. These valves automatically reduce a high inlet pressure from compressed gas tanks to a lower, stable outlet pressure. All have Compressed Gas Association (CGA) numbered inlet fittings for secure connections to compressed gas tanks. Choose a valve with the same CGA number as your tank and other system components. They have a gauge for monitoring inlet pressure from the tank.

Valves with one flowmeter are for one piece of equipment on a tank. The flowmeter has a single scale.

Adapters (sold separately) change 5/8"-18 outlets to 9/16"-18 male connections, and vice versa.

For Use With Argon and Argon/Carbon Dioxide Blend

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Number of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 3,000	Single	5/8"-18	Side	Right Hand	0 to 70 (Argon), 0 to 70 (Argon/Carbon Dioxide Blend)	1	Brass	PTFE	Neoprene	0000000	0000000

Optional Adapter

00000000

Each

000000

For Use With Argon, Argon/Carbon Dioxide Blend, and Helium

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Number of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 3,000	Two	5/8"-18	Side	Right Hand	0 to 40 (Argon), 0 to 40 (Argon/Carbon Dioxide Blend), 0 to 150 (Helium) to150	1	Brass	PTFE	Neoprene	000000000	0000000

Optional Adapter

00000000

Each

000000

For Use With Argon, Argon/Carbon Dioxide Blend, Carbon Dioxide, and Helium

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Number of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 60 (Argon), 0 to 60 (Argon/Carbon Dioxide Blend), 0 to 50 (Carbon Dioxide), 0 to 160 (Helium)	1	Brass	Buna-N	Brass	000000000	0000000

Optional Adapter

00000000

Each

000000

For Use With Carbon Dioxide

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Number of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Female Inlet
CGA 320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 70	1	Brass	PTFE	Neoprene	00000000	0000000

Optional Adapter

00000000

Each

000000

Tank-Mount Pressure-Regulating Valves with Flowmeter for Inert Gas

For Use With: See Table
Temperature Range: -20° to 120° F

Commonly used in TIG welding where gas flow/coverage is a concern, these valves measure the gas flow rate in addition to regulating pressure. They automatically reduce a high inlet pressure from compressed gas tanks to a lower, stable outlet pressure. All have Compressed Gas Association (CGA) numbered inlet fittings for secure connections to compressed gas tanks. Choose a valve with the same CGA number as your tank and other system components. Valves have a gauge to monitor the outlet flow rate and a second gauge to monitor inlet pressure from the tank. They are single stage and reduce pressure in one step, which causes the outlet pressure to fluctuate slightly as you empty the tank.

For Use With Carbon Dioxide

Female Outlet × Female Inlet

Female Outlet × Female Inlet With Hose

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Flow Gauge Included	Body	Seal	Diaphragm	Includes		Each
UNF Female Outlet × NGO Female Inlet
CGA 320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 60	Yes	Brass	PTFE	Neoprene	__	0000000	0000000
CGA 320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 60	Yes	Brass	PTFE	Neoprene	10-ft. long, 3/16" dia. hose with 5/8"-18 male fittings on both ends	0000000	000000
CGA 320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 100	Yes	Brass	PTFE	Neoprene	__	0000000	000000

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
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

Tank-Mount Pressure-Regulating Valves for Cryogenic Cylinders

For Use With: See Table
Temperature Range: -20° to 120° F

Automatically reduce a high inlet pressure from compressed gas tanks to a lower, stable outlet pressure. These valves can remove gases from liquid cryogenic cylinders. They have Compressed Gas Association (CGA) numbered inlet fittings for secure connections to compressed gas tanks. Choose a valve with the same CGA number as your tank and other system components. Valves come with a gauge to monitor outlet pressure. They are single stage and reduce pressure in one step, which causes the outlet pressure to fluctuate slightly as you empty the tank.

	Inlet				Outlet
For Use With	CGA Number	Location	Thread Direction	Stage	Thread Size	Location	Thread Direction	Pressure Range, psi	Pressure Adjustment Method		Each
UNF Male Outlet × NGO Female Inlet
Brass Body—Stainless Steel Diaphragm and PTFE Seal
Carbon Dioxide	CGA 320	Side	Right Hand	Single	9/16"-18	Bottom	Right Hand	0 to 350	T-Handle	0000000	0000000

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

ASME-Code Fast-Acting Pressure-Relief Valves for Cryogenic Fluids

For Use With: Argon, Carbon Dioxide, Helium, Hydrogen, Methane, Nitrogen, Oxygen
Specifications Met: ASME BPVC.VIII
Temperature Range: -320° to 150° F

These valves meet ASME Code Section VIII for use with cryogenic pressure vessels. Rated for use with argon, carbon dioxide, helium, hydrogen, methane, nitrogen, and oxygen, they are cleaned and bagged for oxygen service and other high-purity applications. All spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. Attach a drain line to the threaded relief port for remote discharge.

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

Inlet			Relief Port
Pipe Size	Location	Maximum Pressure, psi	Pipe Size	Location	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
NPT Male Inlet and NPT Female Relief Port
Brass Body and Seal
1/2	Bottom	600	3/4	Side	6 9/16"	Pop Safety	20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300	0000000	0000000
3/4	Bottom	600	1	Side	6 9/16"	Pop Safety	20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300	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-Regulating Valves for Air and Inert Gas

For Use With: Air, Carbon Dioxide, Inert Gas, Nitrogen
Temperature Range: -20° to 180° F

Throttle a high vacuum source to maintain a lower vacuum level in your system. Adjust the outlet vacuum level within the range. All valves have a gauge port.

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

Inlet		Outlet
Pipe Size	Location	Pipe Size	Location	Vacuum Range, in. of Hg	Vacuum Adjustment Method	Vacuum Gauge Included	End-to-End Length		Each
NPT Female
Brass Body—EPR Diaphragm and Buna-N Seal
1/4	Bottom	1/4	Side	0 to 15	Screw	No	1 3/4"	0000000	0000000
1/4	Bottom	1/4	Side	10 to 30	Screw	No	1 3/4"	0000000	000000

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