Reducers for Acetylene | McMaster-Carr

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10 Products

About Gas Regulators

With Knob

For Use With: See Table
Temperature Range: See Table

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.

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.

	Inlet			Outlet
For Use With	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Gauge Range, psi	Temperature Range, ° F	End-to-End Lg.	Port-to-Port Lg.		Each
NPT Female
Brass Body—Neoprene/Nylon Diaphragm and Neoprene Seal
Acetylene	1/4	Side	350	1/4	Bottom, Side	0 to 30	-20° to 120°	2.60"	1.32"	0000000	0000000

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.

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

Male Outlet × Female Inlet Single-Stage Valve With Knob

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

Male Outlet × Male Inlet Single-Stage Valve With Knob

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

Inlet				Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Thread Size	Location	Thread Direction	Pressure Range, psi	Pressure Adjustment Method	Body	Seal	Diaphragm		Each
For Use With Acetylene
UNF Male Outlet × NGO Female Inlet
CGA 300	Side	Right Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	Knob	Brass/Steel	PTFE	Rubber	0000000	0000000
CGA 300	Side	Right Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass	PTFE	Rubber	000000	000000
UNF Male Outlet × NGO Male Inlet
CGA 510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	Knob	Brass/Steel	PTFE	Rubber	0000000	000000
CGA 510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass	PTFE	Rubber	000000	000000
CGA 510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass	PTFE	Stainless Steel	0000000	000000

Two-Stage Valves

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

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

Inlet				Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Thread Size	Location	Thread Direction	Pressure Range, psi	Pressure Adjustment Method	Body	Seal	Diaphragm		Each
For Use With Acetylene
UNF Male Outlet × NGO Female Inlet
CGA 300	Side	Right Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass	PTFE	Stainless Steel	0000000	0000000
CGA 300	Side	Right Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass/Steel	PTFE	Rubber	000000	000000
UNF Male Outlet × NGO Male Inlet
CGA 510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass	PTFE	Stainless Steel	0000000	000000
CGA 510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass/Steel	PTFE	Rubber	0000000	000000