Helium Pressure Regulating Valves

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For Use With

Outlet Pressure

Maximum Inlet Pressure

500 psi to 999 psi

2,000 psi to 3,999 psi

Inlet Pipe Size

Maximum Outlet Pressure Gauge Measurement

Body Material

Outlet Pipe Size

Inlet Thread Type

Valve Function

Outlet Thread Type

Outlet Pressure Adjustment Method

Outlet Connection

Inlet CGA Number

Outlet Connection Port

Connects To

Inlet Connection

Valve Type

Maximum Inlet Pressure Gauge Reading

Set Pressure

Shape

Diaphragm Material

Neoprene/Nylon Plastic

Inlet Gender

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

Export Control Classification Number (ECCN)

2B999

EAR99

DFARS Specialty Metals

Exempt

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62 Products

About Pressure-Relief Valves

About Gas Regulators

About Backflow-Prevention Valves

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

Often used for oxygen service and other high-purity applications, these valves are cleaned and bagged to meet CGA G-4.1 standards to prevent contamination. 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. They are no-bleed style, so they keep process gases contained in the valve.

Inlet			Outlet		Gauge Port
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pipe Size	Location	End-to-End Lg.	Choose an Outlet Pressure Range, psi		Each
NPT Female
Brass Body—Buna-N Diaphragm and Fluoroelastomer Seal
1/2	Side	500	1/2	Side	1/4	Side	2 13/16"	5 to 55, 40 to 110, 100 to 200, 175 to 300	00000000	0000000
3/4	Side	500	3/4	Side	1/4	Side	3 5/16"	5 to 55, 40 to 110, 100 to 200, 175 to 275	00000000	000000
1	Side	500	1	Side	1/4	Side	3 5/16"	5 to 55, 40 to 110, 100 to 200, 175 to 275	00000000	000000

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.

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	000000000

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.

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

Cleaned and Bagged Panel-Mount
Pressure-Regulating Valves for Air and Inert Gas

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

Commonly used for oxygen service and other high-purity applications, these valves come cleaned and bagged to prevent contamination. All 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. They can also be surface mounted. All have two gauge ports. Body is 316 stainless steel for exceptional corrosion resistance. Valves are no-bleed style, so they keep process gases contained in the valve.

Inlet			Outlet			Gauge Port
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Range, psi	Pipe Size	Connection	End-to-End Lg.	Panel Cutout Dia.		Each
NPT Female
316 Stainless Steel Body—316 Stainless Steel Diaphragm and PTFE Seal
1/4	Side	3,500	1/4	Side	0 to 25	1/4	NPT Female	5 3/8"	1.37"	0000000	0000000
1/4	Side	3,500	1/4	Side	0 to 100	1/4	NPT Female	5 3/8"	1.37"	0000000	000000
1/4	Side	3,500	1/4	Side	0 to 250	1/4	NPT Female	5 3/8"	1.37"	0000000	000000
1/4	Side	3,500	1/4	Side	0 to 500	1/4	NPT Female	5 3/8"	1.37"	0000000	000000
1/2	Side	500	1/2	Side	0 to 25	1/4	NPT Female	5 1/2"	1.37"	0000000	00000000
1/2	Side	500	1/2	Side	0 to 100	1/4	NPT Female	5 1/2"	1.37"	0000000	00000000
1/2	Side	500	1/2	Side	0 to 150	1/4	NPT Female	5 1/2"	1.37"	0000000	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.

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.

Valves with flared tube outlet fittings form a tight seal on metal tubing.

Single-Stage Valves

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

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

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

Male Outlet × Male 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
37° Flared UNF Male Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	10 to 200	__	Brass	Polyurethane	Neoprene/Nylon	00000000	0000000
45° Flared UN/UNF (SAE 45°) Male Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Neoprene	00000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 500	T-Handle	Brass	PTFE	Neoprene	00000000	000000
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	PTFE	Stainless Steel	00000000	000000
9/16"-18 UNF Male Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 50	T-Handle	Brass	PTFE	Neoprene	00000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Rubber	0000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 145	Knob	Brass/Steel	PTFE	Rubber	0000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 200	T-Handle	Brass	PTFE	Rubber	0000000	000000

Two-Stage Valves

Female Outlet × Male 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
1/4 NPT Female Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Neoprene	00000000	0000000
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Stainless Steel	00000000	000000
5/8"-18 UNF Female Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 50	T-Handle	Brass	PTFE	Neoprene	00000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 50	T-Handle	Brass	PTFE	Stainless Steel	0000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Stainless Steel	0000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass/Steel	PTFE	Rubber	0000000	000000

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

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

Often used for pressure-vessel testing and other high-pressure applications, these valves can handle at least seven times the outlet pressure of standard tank-mount pressure-regulating valves. 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. Outlet fittings are Swagelok® for a leak-free seal around hard metal tubing in high-pressure lines. Also known as instrumentation fittings, Swagelok® fittings are compatible with Parker A-Lok, Gyrolok, Bilok, and Tylok fittings. Valves have a gauge to monitor outlet pressure and a 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 Use With Argon, Helium, and Nitrogen

Female Outlet × Female Inlet Elbow With T-Handle

Female Outlet × Male Inlet Elbow With T-Handle

Inlet					Outlet				Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	For Tube OD	Location	Pressure Range, psi	Shape	Body	Seal		Each
NGO Female Inlet × Swagelok® Female Outlet
CGA 677	Side	Left Hand	0 to 7,500	Single	1/4"	Bottom	300 to 4,500	90° Elbow	Brass	PCTFE	0000000	000000000
NGO Male Inlet × Swagelok® Female Outlet
CGA 580	Side	Right Hand	0 to 4,000	Single	1/4"	Bottom	200 to 3,000	90° Elbow	Brass	PCTFE	0000000	000000

High-Purity Tank-Mount Pressure-Regulating Valves for Inert Gas

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

Reduce contaminants in research sample systems, emission monitoring systems, chromatography, and other high-purity applications that use argon, helium, nitrogen, or carbon dioxide. These valves have a 316 stainless steel and brass body with a smooth finish to reduce dust collection and internal components designed to protect the seal and diaphragm from contamination. 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. Outlet fittings are Swagelok® for a leak-free seal around hard metal tubing in high-pressure lines. Also known as instrumentation fittings, Swagelok® fittings are compatible with Parker A-Lok, Gyrolok, Bilok, and Tylok fittings. Valves have a gauge to monitor outlet pressure and a gauge to monitor inlet pressure from the tank.

Chrome-plated valves add a layer of corrosion resistance.

For Use With Argon, Helium, and Nitrogen

Swagelok® Female Outlet × NGO Male Inlet (Brass)

Swagelok® Female Outlet × NGO Male Inlet (Chrome-Plated Brass)

Inlet					Outlet
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	For Tube OD	Location	Pressure Range, psi	Pressure Adjustment Method		Each
Swagelok® Female Outlet × NGO Male Inlet
Brass Body—316 Stainless Steel Diaphragm and PTFE Seal
CGA 580	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 15	Knob	0000000	0000000
CGA 580	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 125	Knob	0000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 500	Knob	0000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 15	Knob	0000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 50	Knob	0000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 125	Knob	0000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 250	Knob	0000000	000000
Chrome-Plated Brass Body—316 Stainless Steel Diaphragm and PTFE Seal
CGA 580	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 50	Knob	0000000	000000

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

Male Inlet × Female Outlet With One Flowmeter

Male Inlet × Female Outlet With Two Flowmeters

Flowmeters let you see the gas flow rate from a distance. 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. They have a gauge for monitoring inlet pressure from the tank.

Valves with one flowmeter are for one piece of equipment on a tank. The flowmeter has a single scale.

Valve with two flowmeters lets you simultaneously run two pieces of equipment from one tank. Both flowmeters have a dual scale.

Adapters (sold separately) change 5/8"-18 outlets to 9/16"-18 male connections, and vice versa.

For Use With Argon, Argon/Carbon Dioxide Blend, and Helium

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Number of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 3,000	Two	5/8"-18	Side	Right Hand	0 to 40 (Argon), 0 to 40 (Argon/Carbon Dioxide Blend), 0 to 150 (Helium)	1	Brass	PTFE	Neoprene	000000000	0000000

Optional Adapter

00000000

Each

000000

For Use With Argon, Argon/Carbon Dioxide Blend, Carbon Dioxide, and Helium

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Number of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 60 (Argon), 0 to 60 (Argon/Carbon Dioxide Blend), 0 to 50 (Carbon Dioxide), 0 to 160 (Helium)	1	Brass	Buna-N	Brass	000000000	0000000

Optional Adapter

00000000

Each

000000

For Use With Argon and Helium

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Number of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 3,000	Two	5/8"-18	Side	Right Hand	0 to 18 (Argon), 0 to 50 (Helium)	1	Brass	PTFE	Neoprene	000000000	0000000
CGA 580	Side	Right Hand	0 to 3,000	Two	5/8"-18	Side	Right Hand	0 to 65 (Argon), 0 to 200 (Helium)	1	Brass	PTFE	Neoprene	000000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 45 (Argon), 0 to 140 (Helium)	1	Brass	PTFE	Neoprene	00000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 45 (Argon), 0 to 140 (Helium)	2	Brass	PTFE	Neoprene	0000000	000000

Optional Adapter

00000000

Each

000000

For Use With Helium and Hydrogen

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Number of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 100 (Helium), 0 to 140 (Hydrogen)	1	Brass	PTFE	Neoprene	000000000	0000000

Optional Adapter

00000000

Each

000000

ASME-Code Fast-Acting Pressure-Relief Valves for Cryogenic Fluids

For Use With: Argon, Carbon Dioxide, Helium, Hydrogen, Methane, Nitrogen, Oxygen
Specifications Met: ASME BPVC.VIII
Temperature Range: -320° to 150° F

These valves meet ASME Code Section VIII for use with cryogenic pressure vessels. Rated for use with argon, carbon dioxide, helium, hydrogen, methane, nitrogen, and oxygen, they are cleaned and bagged for oxygen service and other high-purity applications. All spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. Attach a drain line to the threaded relief port for remote discharge.

Inlet			Relief Port
Pipe Size	Location	Maximum Pressure, psi	Pipe Size	Location	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
NPT Male Inlet and NPT Female Relief Port
Brass Body and Seal
1/2	Bottom	600	3/4	Side	6 9/16"	Pop Safety	20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300	0000000	0000000
3/4	Bottom	600	1	Side	6 9/16"	Pop Safety	20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300	0000000	000000

Vacuum-Breaking Valves for Chemicals

A plastic body withstands pH neutralizing, cleaning, and plating solutions containing sodium hydroxide, methyl ethyl ketone, and other harsh chemicals. Also known as vacuum breakers, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.

Diaphragm

For Use With: Air, Ammonia, Argon, Beverage, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Food, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol, Methyl Ethyl Ketone, Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide, Sodium Hypochlorite, Water, Xenon
Diaphragm Material: Fluoroelastomer Rubber
Seal Material: Fluoroelastomer Rubber

PVC Plastic Body
Pipe Size	For Pipe Schedule	Max. Pressure	Min. Opening Pressure, psi	End-to-End Lg.	Color	Temperature Range, °F		Each
NPT Female × NPT Female
1/2	80	100 psi @ 75° F	1	4 5/16"	Gray	40° to 140°	000000	0000000
3/4	80	100 psi @ 75° F	1	4 5/8"	Gray	40° to 140°	0000000	000000
1	80	100 psi @ 75° F	1	5 1/8"	Gray	40° to 140°	0000000	000000
CPVC Plastic Body
NPT Female × NPT Female
1/2	80	100 psi @ 75° F	1	4 5/16"	Light Gray	40° to 180°	0000000	000000
3/4	80	100 psi @ 75° F	1	4 5/8"	Light Gray	40° to 180°	0000000	000000
1	80	100 psi @ 75° F	1	5 1/8"	Light Gray	40° to 180°	0000000	000000

Spring-Loaded Piston

For Use With: Air, Ammonia, Argon, Beverage, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Food, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol, Methyl Ethyl Ketone, Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide, Sodium Hypochlorite, Water, Xenon
Piston Material:
PVC Plastic Body: PVC Plastic
CPVC Plastic Body: CPVC Plastic
Spring Material: Plastic Polymer
Seal Material: Fluoroelastomer Rubber

PVC Plastic Body
Pipe Size	For Pipe Schedule	Max. Pressure	Min. Opening Pressure, psi	End-to-End Lg.	Color	Temperature Range, °F		Each
NPT Female × NPT Female
2	80	100 psi @ 75° F	1	8 1/2"	Gray	40° to 140°	0000000	0000000
CPVC Plastic Body
NPT Female × NPT Female
1 1/2	80	100 psi @ 75° F	1	7 15/16"	Light Gray	40° to 180°	0000000	000000

Vacuum-Breaking Valves

Also known as vacuum breakers, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.

303 stainless steel valves have the best corrosion resistance.

Straights are often used with steam coils, heat exchangers, and space heaters.

Straights

For Use With: Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon
Seal Material: EPR Rubber

Brass Body
Inlet Pipe Size	Outlet Pipe Size	Max. Pressure	Temperature Range, °F	End-to-End Lg.	Body Material		Each
NPT Male Inlet × NPT Female Outlet
1/2	3/8	300 psi @ 70° F	-20° to 365°	1 3/4"	Brass	0000000	0000000
3/4	1/2	300 psi @ 70° F	-20° to 365°	2 1/8"	Brass	0000000	000000
1	3/4	300 psi @ 70° F	-20° to 365°	2 3/8"	Brass	0000000	000000
303 Stainless Steel Body
NPT Male Inlet × NPT Female Outlet
1/2	3/8	300 psi @ 70° F	-20° to 365°	1 3/4"	303 Stainless Steel	0000000	000000
3/4	1/2	300 psi @ 70° F	-20° to 365°	2 1/8"	303 Stainless Steel	0000000	000000
1	3/4	300 psi @ 70° F	-20° to 365°	2 3/8"	303 Stainless Steel	0000000	000000

High-Pressure Vacuum-Breaking Valves

For Use With: Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon
Seal Material: Fluoroelastomer Rubber

Rated for 12 times the pressure of standard vacuum-breaking valves, these can handle up to 1,500 psi. Also known as vacuum breakers, they have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping. Body is 316 stainless steel for excellent corrosion resistance.

Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.

316 Stainless Steel Body
Outlet Pipe Size	Inlet Pipe Size	Flow Coefficient (Cv)	Max. Pressure	Temperature Range, °F	End-to-End Lg.		Each
NPT Male × NPT Female
3/4	1/2	4.6	1,500 psi @ 70° F	-10° to 400°	1 5/16"	0000000	0000000
1	3/4	6.6	1,500 psi @ 70° F	-10° to 400°	1 7/8"	0000000	000000