30° Elbow Reducers | McMaster-Carr

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Outlet Pressure

Inlet CGA Number

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500 psi to 999 psi

1,000 psi to 3,999 psi

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NPT

UN/UNF (SAE 45°)

UNF

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Outlet Connection

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Neoprene/Nylon Plastic

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Inlet Gender

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Inlet Thread Type

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Maximum Inlet Pressure Gauge Reading

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REACH

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57 Products

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

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


NPT Male Outlet × Male Inlet Single-Stage Valves with T-Handle	Female Outlet × Female Inlet Single-Stage Valves with Knob	Female Outlet × Male Inlet Single-Stage Valves with T-Handle	UNF Male Outlet × Female Inlet Single-Stage Valves with T-Handle

UNF Male Outlet × Female Inlet Single-Stage Valves with Knob	Flared Outlet × Male Inlet Single-Stage Valves	UNF Male Outlet x Male Inlet Single-Stage Valves with T-Handle	UNF Male Outlet × Male Inlet Single-Stage Valves With Knob

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.

37° Flared Outlet Connection and 45° Flared Outlet Connection—Valves with flared tube outlet fittings form a tight seal on metal tubing.

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	Location	Thread Direction	Pressure Range, psi	Pressure Adjustment Method	Body	Seal	Diaphragm	Temp. Range, ° F		Each
For Argon, Helium, and Nitrogen







				37° Flared UNF Male Outlet × NGO Male Inlet

				580	Side	Right Hand	0 to 4,000	Side	Right Hand	10 to 200	—	Brass	Polyurethane Rubber	Neoprene/Nylon	-20 to 120	66325A42	0000000




						45° Flared UN/UNF (SAE 45°) Male Outlet × NGO Male Inlet

						580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Neoprene	-20 to 120	3687N113	000000


						580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 500	T-Handle	Brass	PTFE	Neoprene	-20 to 120	66325A23	000000




								5/8"-18 UNF Female Outlet × NGO Male Inlet

								580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	3687N117	000000




										9/16"-18 UNF Male Outlet × NGO Male Inlet

										580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 50	T-Handle	Brass	PTFE	Neoprene	-20 to 120	3687N115	000000


										580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Rubber	-20 to 120	7897A38	000000
										580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 145	Knob	Brass/Steel	PTFE	Rubber	-20 to 120	7897A65	000000
										580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 200	T-Handle	Brass	PTFE	Rubber	-20 to 120	7897A12	000000


										For Carbon Dioxide







														5/8"-18 UNF Female Outlet × NGO Female Inlet

														320	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 145	Knob	Brass	PTFE	Neoprene	-20 to 120	3687N112	000000




																9/16"-18 UNF Male Outlet × NGO Female Inlet

																320	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Rubber	-20 to 120	7897A39	000000


																For Oxygen







		9/16"-18 UNF Male Outlet × NGO Female Inlet

		540	Side															Right Hand	0 to 4,000	Side	Left Hand	0 to 50	Knob	Brass	PTFE	Neoprene	-20 to 120	3687N111	000000


		540	Side															Right Hand	0 to 4,000	Side	Right Hand	0 to 50	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	3687N116	000000
		540	Side															Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Rubber	-20 to 120	7897A31	000000
		540	Side															Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	7897A51	000000
		540	Side	Right Hand														0 to 4,000	Side	Right Hand	0 to 145	Knob	Brass/Steel	PTFE	Rubber	-20 to 120	7897A61	000000
		540	Side	Right Hand	0 to 4,000													Side	Right Hand	0 to 200	T-Handle	Brass	PTFE	Rubber	-20 to 120	7897A1	000000
		540	Side	Right Hand	0 to 4,000													Side	Right Hand	0 to 200	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	3687N118	000000


		For Air







						1/4 NPT Male Outlet × NGO Male Inlet

						590	Side											Left Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Rubber	-20 to 120	7897A59	000000


						590	Side											Left Hand	0 to 4,000	Side	Right Hand	0 to 145	Knob	Brass/Steel	PTFE	Rubber	-20 to 120	7897A56	000000


						For Breathable Air







																		9/16"-18 UNF Male Outlet × NGO Female Inlet

																		346	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Rubber	-20 to 120	7897A57	000000


										346	Side							Right Hand	0 to 4,000	Side	Right Hand	0 to 200	T-Handle	Brass	PTFE	Rubber	-20 to 120	7897A58	000000

Two Stage


NPT Female Outlet × Female Inlet Two-Stage Valves with T-Handle	NPT Female Outlet × Male Inlet Two-Stage Valves with T-Handle	NPT Male Outlet × Male Inlet Two-Stage Valves with T-Handle

UNF Female Outlet x Female Inlet Two-Stage Valves with T-Handle	UNF Female Outlet x Male Inlet Two-Stage Valves with T-Handle	UNF Male Outlet × Female Inlet Two-Stage Valves with T-Handle

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	Location	Thread Direction	Pressure Range, psi	Pressure Adjustment Method	Body	Seal	Diaphragm	Temp. Range, ° F		Each
For Argon, Helium, and Nitrogen







				1/4 NPT Female Outlet × NGO Male Inlet

				580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Neoprene	-20 to 120	3687N122	0000000


				580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	3687N126	000000




						5/8"-18 UNF Female Outlet × NGO Male Inlet

						580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 50	T-Handle	Brass	PTFE	Neoprene	-20 to 120	3687N121	000000


						580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 50	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	7897A22	000000
						580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass/Steel	PTFE	Rubber	-20 to 120	7897A16	000000
						580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	7897A23	000000


						For Carbon Dioxide







										1/4 NPT Female Outlet × NGO Female Inlet

										320	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Neoprene	-20 to 120	3687N124	000000


										320	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	3687N129	000000




												5/8"-18 UNF Female Outlet × NGO Female Inlet

												320	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass/Steel	PTFE	Rubber	-20 to 120	7897A17	000000


												For Oxygen







																1/4 NPT Female Outlet × NGO Female Inlet

																540	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Neoprene	-20 to 120	3687N12	000000


																540	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	7897A75	000000




																9/16"-18 UNF Male Outlet × NGO Female Inlet

		540	Side													Right Hand	0 to 4,000	Side	Right Hand	0 to 50	T-Handle	Brass	PTFE	Neoprene	-20 to 120	3687N119	000000


		540	Side													Right Hand	0 to 4,000	Side	Right Hand	0 to 50	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	3687N125	000000
		540	Side													Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass/Steel	PTFE	Rubber	-20 to 120	7897A3	000000
		540	Side													Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	7897A74	000000


		For Air







																1/4 NPT Male Outlet × NGO Male Inlet

																590	Side	Left Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	3687N131	000000


																590	Side	Left Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	3687N132	000000


						For Breathable Air







																1/4 NPT Female Outlet × NGO Female Inlet

																346	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	3687N135	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	Male Outlet × Female Inlet Single-Stage Valve With Knob	Male Outlet × Male Inlet Single-Stage Valve With T-Handle	Male Outlet × Male Inlet Single-Stage Valve With Knob

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 Acetylene







				UNF Male Outlet × NGO Female Inlet

				300	Side	Right Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass	PTFE	Rubber	-20 to 120	7897A2	0000000


				300	Side	Right Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	Knob	Brass/Steel	PTFE	Rubber	-20 to 120	7897A62	000000




						UNF Male Outlet × NGO Male Inlet

						510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass	PTFE	Rubber	-20 to 120	7897A7	000000


						510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	7897A53	000000
						510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	Knob	Brass/Steel	PTFE	Rubber	-20 to 120	7897A63	000000


						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	000000


										For Propane and Propylene







														UNF Male Outlet × NGO Male Inlet

														510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 50	T-Handle	Brass	PTFE	Rubber	-20 to 120	7897A13	000000


														510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	5 to 50	Knob	Brass/Steel	PTFE	Rubber	-20 to 120	7897A66	000000

Two Stage


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

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 Acetylene







				UNF Male Outlet × NGO Female Inlet

				300	Side	Right Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass/Steel	PTFE	Rubber	-20 to 120	7897A4	0000000




						UNF Male Outlet × NGO Male Inlet

						510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass/Steel	PTFE	Rubber	-20 to 120	7897A14	000000


						510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 15	T-Handle	Brass	PTFE	Stainless Steel	-20 to 120	7897A81	000000


						For Propane and Propylene







										UNF Male Outlet × NGO Male Inlet

										510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 50	T-Handle	Brass/Steel	PTFE	Rubber	-20 to 120	7897A18	000000

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

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 Argon


Female Outlet × Male Inlet	Female Outlet × Male Inlet with Hose

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



		580	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 60	Yes	Brass	PTFE	Neoprene	—	-20 to 120	7997A65	0000000


		580	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	-20 to 120	7997A67	000000
		580	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 100	Yes	Brass	PTFE	Neoprene	—	-20 to 120	7997A52	000000

For Carbon Dioxide


Female Outlet × Female Inlet	Female Outlet × Female Inlet with Hose

	Inlet					Outlet					Material
	CGA No.	Location	Thread Direction	Pressure Gauge Reading Range, psi	No. of Stages	Thread Size	Location	Thread Direction	Flow Range, scfh	Flow Gauge Included	Body	Seal	Diaphragm	Includes	Temp. Range, ° F		Each
UNF Female Outlet × NGO Female Inlet



		320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 60	Yes	Brass	PTFE	Neoprene	—	-20 to 120	7997A66	0000000


		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	-20 to 120	7997A68	000000
		320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 100	Yes	Brass	PTFE	Neoprene	—	-20 to 120	7997A51	000000