ASME Relief Valves | McMaster-Carr

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14 Products

Panel-Mount Ultra-High-Pressure-Regulating Valves for Air and Inert Gas

For Use With: Air, Nitrogen, Argon, Helium
Temperature Range: -40° to 165° F

These valves are rated for inlet pressures up to 6,000 psi. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Threads below the adjustment knob and an included mounting bracket let you install these valves in instrument panels. They have two gauge ports. An internal strainer traps debris.

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

Inlet			Outlet		Gauge Port
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pipe Size	Location	End-to-End Lg.	Panel Cutout Dia.	Specifications Met	Choose an Outlet Pressure Range, psi		Each
NPT Female
Brass Body—Polyimide Seal
1/4	Side	6,000	1/4	Side	1/4	Side	2 1/8"	2 1/4"	ASME B31.3	0 to 500, 0 to 800, 10 to 1,500, 15 to 2,500, 25 to 4,000, 50 to 6,000	0000000	0000000

Panel-Mount High-Pressure-Regulating Valves for Air and Inert Gas

For Use With: Air, Nitrogen, Argon, Helium
Temperature Range: -40° to 165° F

Withstand inlet pressures up to 3,500 psi. These valves automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Valves have threads below the adjustment knob and come with a panel-mount nut. All have two gauge ports. An internal strainer traps debris.

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

Inlet			Outlet		Gauge Port
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pipe Size	Location	End-to-End Lg.	Panel Cutout Dia.	Specifications Met	Choose an Outlet Pressure Range, psi		Each
NPT Female
Brass Body—316 Stainless Steel Diaphragm and PTFE Seal
1/4	Side	3,500	1/4	Side	1/4	Side	2"	1 3/8"	ASME B31.3	0 to 25, 0 to 50, 0 to 100, 0 to 250, 0 to 500	0000000	0000000

Pressure-Regulating Valves with Push-to-Connect Fittings for Food and Beverage

For Use With: Food and Beverage
Temperature Range: 35° to 125° F

Insert plastic or soft metal tubing into the push-to-connect fittings on these valves for a low-pressure seal in food and beverage lines. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. They have two gauge ports.

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

Inlet				Outlet
Tube Connection Type	For Tube OD	Location	Max. Pressure, psi	For Tube OD	Location	Pressure Adjustment Method	End-to-End Length	Specifications Met	Choose an Outlet Pressure Range, psi		Each
Push-to-Connect Female
Noryl PPO Body—Buna-N Diaphragm and Seal
Push to Connect	1/4"	Side	300	1/4"	Side	Screw	2 13/16"	NSF/ANSI 61	0 to 25, 0 to 60, 0 to 125	0000000	0000000

Threaded Pressure-Regulating Valves for Food and Beverage

With Knob

With Screw

For Use With: Food and Beverage
Temperature Range: 35° to 125° F

These valves are often used to regulate pressure in food and beverage lines. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Valves have two gauge ports and come with plugs to close the unused ports.

Valves with knob have a Buna-N/Nylon diaphragm which is FDA Compliant 21 CFR 177.2600.

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

Inlet			Outlet
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	End-to-End Lg.	Specifications Met	Choose an Outlet Pressure Range, psi		Each
NPT Female
Acetal Body—Buna-N/Nylon Diaphragm and EPDM Seal with Knob
1/4	Side	150	1/4	Side	Knob	1 5/8"	FDA Compliant 21 CFR 177.2600, NSF/ANSI 61	5 to 50, 5 to 125	0000000	000000
Noryl PPO Body—Buna-N Diaphragm and Seal with Screw
1/4	Side	300	1/4	Side	Screw	1 9/16"	NSF/ANSI 61	0 to 25, 0 to 60, 0 to 125	0000000	000000

Pressure-Regulating Valves for Drinking Water

Valve

Valve With Union Fitting

For Use With: Drinking Water
Temperature Range: 33° to 140° F

These valves meet NSF/ANSI 61 for use in drinking water systems. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. All valves have a gauge port. An internal strainer traps debris. Body is bronze for durability and a long service life.

Valves with union fitting disassemble for easy installation and removal.

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

Inlet			Outlet
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Range, psi	End-to-End Lg.	Specifications Met		Each
NPT Female
Bronze Body—Buna-N Diaphragm and Seal with Internal Strainer
1/2	Side	400	1/2	Side	15 to 75	3 1/2"	ASSE 1003 Listed, CSA Certified, IAPMO Listed, NSF/ANSI 61	0000000	000000
3/4	Side	400	3/4	Side	15 to 75	3 1/2"	ASSE 1003 Listed, CSA Certified, IAPMO Listed, NSF/ANSI 61	0000000	00000
1	Side	400	1	Side	15 to 75	4"	ASSE 1003 Listed, CSA Certified, IAPMO Listed, NSF/ANSI 61	0000000	000000
Bronze Body—Buna-N Diaphragm and Seal with Internal Strainer and Union Fitting
1/2	Side	400	1/2	Side	15 to 75	4 3/8"	ASSE 1003 Listed, CSA Certified, IAPMO Listed, NSF/ANSI 61	0000000	000000
3/4	Side	400	3/4	Side	15 to 75	4 7/16"	ASSE 1003 Listed, CSA Certified, IAPMO Listed, NSF/ANSI 61	0000000	000000
1	Side	400	1	Side	15 to 75	4 15/16"	ASSE 1003 Listed, CSA Certified, IAPMO Listed, NSF/ANSI 61	0000000	000000
1 1/4	Side	400	1 1/4	Side	15 to 75	6 3/16"	ASSE 1003 Listed, CSA Certified, IAPMO Listed, NSF/ANSI 61	0000000	000000
1 1/2	Side	300	1 1/2	Side	25 to 75	6 5/16"	ASSE 1003 Listed, CSA Certified, IAPMO Listed, NSF/ANSI 61	0000000	000000
2	Side	300	2	Side	25 to 75	6 1/4"	ASSE 1003 Listed, CSA Certified, IAPMO Listed, NSF/ANSI 61	0000000	000000