Brass/Steel Valves | McMaster-Carr

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	For Use With For Use With

	Outlet Pressure Outlet Pressure

	Inlet CGA Number Inlet CGA Number

	Outlet Pressure Adjustment Method Outlet Pressure Adjustment Method

Knob

T-Handle

	Stage Stage

Single

Two

	Maximum Inlet Pressure Maximum Inlet Pressure

500psi

3,000 psi

	Inlet Gender Inlet Gender

Female

Male

	Maximum Outlet Pressure Gauge Maximum Outlet Pressure Gauge

	Body Material Body Material	Show

Brass/Steel

	Body Material Body Material	Hide

Aluminum

Brass

Brass/Stainless Steel

	Outlet Gender Outlet Gender

Female

Male

	Outlet Connection Type Outlet Connection Type

	Pipe

	Valve Type Valve Type

Pressure Regulator

	Inlet Pressure Gauge Included Inlet Pressure Gauge Included

Yes

	Outlet Thread Type Outlet Thread Type

UNF

	Maximum Inlet Pressure Gauge Maximum Inlet Pressure Gauge

400 psi

4,000 psi

	Inlet Thread Type Inlet Thread Type

NGO

	Inlet Thread Direction Inlet Thread Direction

Right Hand

Left Hand

	Valve Function Valve Function

Pressure Regulation

	Shape Shape

	30° Elbow

	Outlet Connection Style Outlet Connection Style

Threaded

	Outlet Pressure Gauge Included Outlet Pressure Gauge Included

Yes

	Inlet Connection Style Inlet Connection Style

Threaded

	Diaphragm Material Diaphragm Material

Rubber

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12 Products

About Gas Regulators

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.

Single-Stage Valves

Male Outlet × Male Inlet Single-Stage Valve With Knob

Male Outlet × Female Inlet Single-Stage Valve With Knob

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 Argon, Helium, and Nitrogen
9/16"-18 UNF Male Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 145	Knob	Brass/Steel	PTFE	Rubber	0000000	0000000
For Use With Oxygen
9/16"-18 UNF Male Outlet × NGO Female Inlet
CGA 540	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 145	Knob	Brass/Steel	PTFE	Rubber	0000000	000000
For Use With Air
9/16"-18 UNF Male Outlet × NGO Male Inlet
CGA 590	Side	Left Hand	0 to 4,000	Side	Left Hand	0 to 145	Knob	Brass/Steel	PTFE	Rubber	0000000	000000

Two-Stage Valves

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

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

Male 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 Argon, Helium, and Nitrogen
5/8"-18 UNF Female Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass/Steel	PTFE	Rubber	0000000	0000000
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 125	T-Handle	Brass/Steel	PTFE	Rubber	0000000	000000
For Use With Oxygen
9/16"-18 UNF Male Outlet × NGO Female Inlet
CGA 540	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass/Steel	PTFE	Rubber	000000	000000

Tank-Mount Pressure-Regulating Valves for Fuel Gases

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

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.