Steel Pressure Regulators

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35 Products

About Pressure-Relief Valves

About Gas Regulators

About Grease Fitting Threads

For Use With: Water, Oil, Air, Inert Gas
Temperature Range: 32° to 550° F

Rated for more than double the temperature of standard pressure-regulating valves, these can withstand temperatures up to 550° F. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Valves meet ANSI/FCI 70-2 Class IV for tight shut-off (max. leakage rate of 0.01%).

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
Steel Body—316 Stainless Steel Diaphragm and 303 Stainless Steel Seal
1/2	Side	300	1/2	Side	3 5/8"	2 to 23, 10 to 38, 20 to 55, 35 to 160, 95 to 220	00000000	000000000
3/4	Side	300	3/4	Side	3 5/8"	2 to 23, 10 to 38, 20 to 55, 35 to 160, 95 to 220	00000000	00000000
1	Side	300	1	Side	4 3/16"	5 to 20, 10 to 30, 20 to 45, 30 to 95, 60 to 160	00000000	00000000
1 1/2	Side	300	1 1/2	Side	4 13/16"	5 to 20, 10 to 30, 20 to 45, 30 to 95, 60 to 160	00000000	00000000
2	Side	300	2	Side	5 1/2"	5 to 20, 10 to 30, 20 to 45, 30 to 95, 60 to 160	00000000	00000000

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.

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.

Single-Stage Valves

Male Outlet × Female Inlet Single-Stage Valve With Knob

Male Outlet × Male Inlet Single-Stage Valve With Knob

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
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
For Use With Propane and Propylene
UNF Male Outlet × NGO Male Inlet
CGA 510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	5 to 50	Knob	Brass/Steel	PTFE	Rubber	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/Steel	PTFE	Rubber	000000	0000000
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/Steel	PTFE	Rubber	0000000	000000
For Use With Propane and Propylene
UNF Male Outlet × NGO Male Inlet
CGA 510	Side	Left Hand	0 to 400	9/16"-18	Side	Left Hand	0 to 50	T-Handle	Brass/Steel	PTFE	Rubber	0000000	000000

Compact Pressure-Relief Valves

Due to their small size, these valves are often installed on tanks in low-clearance areas. They begin opening at the set pressure. Nylon valves fully open at about 10% over the set pressure and steel valves fully open at about 50% over the set pressure. Valves begin closing as pressure drops and fully close when the system pressure is restored below the set pressure. All have a vent outlet to exhaust discharge directly. Set pressure is not adjustable.

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

Steel Body—For Air

For Use With: Air
Temperature Range: Not Rated

Inlet								Each
Pipe Size	Location	Maximum Pressure, psi	Relief Port Location	Overall Ht.	Specifications Met	Set Pressure, psi		1-9	10-Up
NPTF Male Inlet and Relief Vent
1/8	Bottom	1	Top	1/2"	MS35670	0.3	0000000	00000	00000
1/4	Bottom	Not Rated	Top	1 1/8"	__	1	0000000	00000	00000
1/4	Bottom	Not Rated	Top	1 1/8"	__	7.5	0000000	00000	00000
1/4	Bottom	Not Rated	Top	1 1/8"	__	15	0000000	00000	00000
3/8	Bottom	Not Rated	Top	1 3/16"	__	1	0000000	00000	00000
3/8	Bottom	Not Rated	Top	1 3/16"	__	7.5	0000000	00000	00000
1/2	Bottom	Not Rated	Top	1 3/8"	__	1	0000000	00000	00000
1/2	Bottom	Not Rated	Top	1 3/8"	__	7.5	0000000	00000	00000

Steel Body—For Grease and Oil

For Use With: Grease, Oil
Temperature Range: Not Rated

Inlet								Each
Pipe Size	Location	Maximum Pressure, psi	Relief Port Location	Overall Ht.	Specifications Met	Set Pressure, psi		1-9	10-Up
NPTF Male Inlet and Relief Vent
1/8	Bottom	5	Top	1/2"	MS35670	1	000000	00000	00000
1/8	Bottom	15	Top	1/2"	MS35670	7.5	000000	0000	0000
1/8	Bottom	25	Top	1/2"	MS35670	15	000000	0000	0000
1/8	Bottom	80	Top	1/2"	MS35670	45	000000	0000	0000
1/8	Bottom	140	Top	9/16"	MS35670	80	0000000	0000	0000
1/8	Bottom	200	Top	1/2"	MS35670	100	0000000	0000	0000
1/8	Bottom	650	Top	1/2"	MS35670	400	0000000	0000	0000
BSPT Male Inlet and Relief Vent
1/8	Bottom	1	Top	1/2"	__	0.3	0000000	0000	0000
1/8	Bottom	5	Top	1/2"	__	1	0000000	0000	0000
1/8	Bottom	80	Top	1/2"	__	45	0000000	0000	0000