Hydrogen Welding Gas Regulators

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1,000 psi to 1,999 psi

2,000 psi to 3,999 psi

4,000 psi to 4,999 psi

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Single

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DFARS Specialty Metals

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Flow Coefficient (Cv)

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12 Products

High-Purity Tank-Mount Pressure-Regulating Valves for Fuel Gases

Single Stage

Two Stage

Designed to reduce contaminants in high-purity applications using hydrogen and methane gas, these valves have a 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’re often used in research sample systems, emission monitoring systems, and chromatography. 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. 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 come with 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—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—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.

	Inlet					Outlet
	CGA No.	Location	Thread Direction	Pressure Gauge Reading Range, psi	No. of Stages	For Tube OD	Location	Pressure Range, psi	Pressure Adjustment Method	For Use With	Temp. Range, ° F		Each
NGO Female Inlet × Swagelok® Female Outlet







				Brass Body/Stainless Steel Body—316 Stainless Steel Diaphragm and PTFE Seal with Relief Valve

				350	Side	Left Hand	0 to 4,000	Single	1/4"	Side	0 to 15	Knob	Hydrogen, Methane	-20 to 120	7951A17	0000000


				350	Side	Left Hand	0 to 4,000	Single	1/4"	Side	0 to 125	Knob	Hydrogen, Methane	-20 to 120	7951A19	000000
				350	Side	Left Hand	0 to 4,000	Two	1/4"	Side	0 to 15	Knob	Hydrogen, Methane	-20 to 120	7951A27	000000
				350	Side	Left Hand	0 to 4,000	Two	1/4"	Side	0 to 125	Knob	Hydrogen, Methane	-20 to 120	7951A29	000000
				350	Side	Left Hand	0 to 4,000	Two	1/4"	Side	0 to 500	Knob	Hydrogen, Methane	-20 to 120	7951A71	000000

Tank-Mount Pressure-Regulating Valves for Fuel Gases

Attach these valves to acetylene, hydrogen, methane, propane, or propylene tanks to reduce a high inlet pressure to a lower, stable outlet pressure. 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 and a gauge to monitor inlet pressure from the tank.

Single Stage

Male Outlet × Female

Inlet Single-Stage Valve

With T-Handle

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.

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

	Inlet				Outlet					Material
	CGA No.	Location	Thread Direction	Pressure Gauge Reading Range, psi	Thread Size	Location	Thread Direction	Pressure Range, psi	Pressure Adjustment Method	Body	Seal	Diaphragm	Temp. Range, ° F		Each
For Hydrogen







				UNF Male Outlet × NGO Female Inlet

				350	Side	Left Hand	0 to 4,000	9/16"-18	Side	Left Hand	0 to 125	T-Handle	Brass	PTFE	Rubber	-20 to 120	7897A5	0000000

Two Stage

Male Outlet × Female

Inlet Two-Stage Valve

With Knob

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.

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

Stainless Steel Diaphragm—Valves with a stainless steel diaphragm can withstand harsh environments.

	Inlet				Outlet					Material
	CGA No.	Location	Thread Direction	Pressure Gauge Reading Range, psi	Thread Size	Location	Thread Direction	Pressure Range, psi	Pressure Adjustment Method	Body	Seal	Diaphragm	Temp. Range, ° F		Each
For Hydrogen and Methane







				UNF Male Outlet × NGO Female Inlet

				350	Side	Left Hand	0 to 4,000	9/16"-18	Side	Left Hand	0 to 80	Knob	Brass	Neoprene	Stainless Steel	-20 to 120	7897A35	0000000

Pressure-Regulating Valves for Fuel Gases

With T-Handle

Install these valves directly in gas distribution pipelines for acetylene, hydrogen, or propane. They automatically reduce a high inlet pressure to a lower, stable outlet pressure. Valves have two outlets to fit various pipe configurations and come with a plug to close the unused outlet. The gauge monitors outlet pressure. All valves are single stage and reduce pressure in one step, which causes the outlet pressure to fluctuate.

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







				Brass Body—Stainless Steel Diaphragm and Neoprene Seal

				Hydrogen, Propane	1/4	Side	500	1/4	Bottom, Side	T-Handle	0 to 60	0 to 120	2.400"	1.01"	7864A11	0000000


				Hydrogen, Propane	1/4	Side	500	1/4	Bottom, Side	T-Handle	0 to 200	0 to 120	2.400"	1.01"	7864A12	000000

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

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.

For Helium and Hydrogen

Male Inlet × Female

Outlet With One

Flowmeter

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

	Inlet					Outlet					Material
	CGA No.	Location	Thread Direction	Pressure Gauge Reading Range, psi	No. of Stages	Thread Size	Location	Thread Direction	Flow Range	No. of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Male Inlet



		580	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 100 scfh (Helium), 0 to 140 scfh (Hydrogen)	1	Brass	PTFE	Neoprene	78595A499	0000000

Valve Union Fittings

		Each
Adapter	78595A49	000000

For Hydrogen

Female Inlet ×

Male Outlet With

One Flowmeter

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

	Inlet					Outlet					Material
	CGA No.	Location	Thread Direction	Pressure Gauge Reading Range, psi	No. of Stages	Thread Size	Location	Thread Direction	Flow Range	No. of Flowmeters	Body	Seal	Diaphragm		Each
UNF Male Outlet × NGO Female Inlet



		350	Side	Left Hand	0 to 3,000	Single	9/16"-18	Side	Left Hand	0 scfh to 40 scfh	1	Brass	PTFE	Neoprene	78595A498	0000000

Valve Union Fittings