Carbon Dioxide Pressure Regulating Valves

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For Use With

Argon/Carbon Dioxide Blend

Liquid Carbon Dioxide

Inlet Pipe Size

Outlet Pressure

Body Material

Maximum Inlet Pressure

Less than 500 psi

500 psi to 999 psi

2,000 psi to 3,999 psi

Pipe Size

Valve Function

Inlet Thread Type

Outlet Pipe Size

Maximum Temperature

Seal Material

Relief Port Pipe Size

Valve Type

Minimum Temperature

Thread Type

Inlet Gender

Actuation

RoHS

Compliant with Exemptions

Shape

REACH

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Export Control Classification Number (ECCN)

2B999

EAR99

DFARS Specialty Metals

Inlet CGA Number

54 Products

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

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.

NPT Male Inlet and NPT Female Relief Port

Inlet			Relief
Pipe Size	Location	Max. Pressure, psi	Port Pipe Size	Port Location	Shape	Overall Ht.	For Use With	Temp. Range, ° F	Valve Type	Certification	Choose a Set Pressure, psi		Each







			Brass Body—Brass Seal

			1/2	Bottom	600	3/4	Side	90° Elbow	6 9/16"	Argon, Carbon Dioxide, Helium, Hydrogen, Methane, Nitrogen, Oxygen	-320 to 150	Pop Safety	ASME BPVC.VIII	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	8089K12	0000000


			3/4	Bottom	600	1	Side	90° Elbow	6 9/16"	Argon, Carbon Dioxide, Helium, Hydrogen, Methane, Nitrogen, Oxygen	-320 to 150	Pop Safety	ASME BPVC.VIII	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	8089K14	000000

Clean Room Panel-Mount Pressure-Regulating Valves for Air and Inert Gas

Maintain contaminant-free standards in clean room environments. These valves come cleaned and bagged to Fed. Spec. Class 100 and ISO Class 5 clean room standards and have a 316 stainless steel body with a smooth finish to resist dust collection. They automatically reduce a high, variable inlet pressure to a lower, stable output pressure. Valves have threads below the adjustment knob and come with a panel-mount nut. Adjust the outlet pressure within the range.

NPT Female

Image of Product. Front orientation. Pressure-Regulating Valves. Clean Room Panel-Mount Pressure-Regulating Valves for Air and Inert Gas.

Nonrelieving—Nonrelieving valves do not exhaust excess downstream pressure.

1 Gauge Port—Gauge ports let you attach a pressure gauge.

	Valves																Brackets
	Inlet			Outlet			Gauge Port
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Range, psi	No. of Ports	Pipe Size	Location	End-to-End Lg.	Panel Cutout Dia.	Clean Room Std.	For Use With	Temp. Range, ° F		Each		Each
316 Stainless Steel Body—Fluoroelastomer Diaphragm and Seal







				Nonrelieving

				1/8	Side	145	1/8	Side	7 to 102	1	1/4	Side	1.700"	1.2"	Fed. Std. Class 100, ISO Class 5	Air, Nitrogen, Carbon Dioxide, Argon	32 to 140	4238K41	0000000	4238K51	00000


				1/4	Side	145	1/4	Side	7 to 102	1	1/4	Side	1.700"	1.2"	Fed. Std. Class 100, ISO Class 5	Air, Nitrogen, Carbon Dioxide, Argon	32 to 140	4238K42	000000	4238K51	0000
				1/4	Side	145	1/4	Side	7 to 102	1	1/4	Side	2.280"	1.44"	Fed. Std. Class 100, ISO Class 5	Air, Nitrogen, Carbon Dioxide, Argon	32 to 140	4238K43	000000	4238K52	00000
				3/8	Side	145	3/8	Side	7 to 102	1	1/4	Side	2.280"	1.44"	Fed. Std. Class 100, ISO Class 5	Air, Nitrogen, Carbon Dioxide, Argon	32 to 140	4238K44	000000	4238K52	00000
				1/2	Side	145	1/2	Side	7 to 102	1	1/4	Side	2.280"	1.44"	Fed. Std. Class 100, ISO Class 5	Air, Nitrogen, Carbon Dioxide, Argon	32 to 140	4238K45	000000	4238K52	00000

Pressure Gauges

		Each
Pressure Gauge	4238K47	000000

Long-Life Pressure-Regulating Valves for Cryogenic Liquids

For a longer service life than standard valves for cryogenic liquids, these have a durable bronze body. All are cleaned and bagged for oxygen service and other high-purity applications. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Valves are designed to withstand the extreme cold of liquid argon, liquid carbon dioxide, liquid nitrogen, and liquid oxygen. They have an internal strainer to trap debris.

	Inlet			Outlet
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	End-to-End Lg.	For Use With	Temp. Range, ° F	Choose an Outlet Pressure, psi		Each
NPT Female







				Bronze Body—Bronze Diaphragm and PTFE Seal with Internal Strainer

				1/4	Side	400	1/4	Side	Screw	3 1/16"	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 150	10 to 30 , 75 to 250	49165K39	0000000


				1/2	Side	400	1/2	Side	Screw	4 1/2"	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 150	10 to 30 , 20 to 75 , 20 to 100 , 50 to 250	49165K59	000000
				1	Side	400	1	Side	Screw	5 7/8"	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 150	10 to 35 , 20 to 60 , 20 to 100 , 75 to 250	49165K79	000000

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


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

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.

Brass Body—Valves with a brass body have a longer service life than valves with a brass and steel body.

	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 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	0000000




						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

Two Stage


NPT Female Outlet × Female Inlet Two-Stage Valves with T-Handle	UNF Female Outlet x 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 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	0000000


				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

Pressure-Relief Valves for Cryogenic Applications

Cleaned and bagged to meet CGA G-4.1 for oxygen service and other high-purity applications, these valves are built to withstand the extreme cold of liquid carbon dioxide, liquid nitrogen, and liquid oxygen. They begin opening at the set pressure and fully open at about 10% over the set pressure. Valves begin closing as pressure drops and fully close when the system pressure is restored below the set pressure. Set pressure is not adjustable. Valves are not intended for direct contact with cryogenic liquids.

Riser Tubes—Riser tubes (sold separately) are required to convert cryogenic liquids into gases before they contact the valve._3/8 NPT valve requires a _1/2 NPT × _3/8 NPT bushing when using a riser.

Adapters—Adapters (sold separately) convert the valve relief-port connection from UNEF female threads to NPT female threads.

	Valves											Riser Tubes		Adapters
	Inlet			Relief
	Pipe Size	Location	Max. Pressure, psi	Port Thread Size	Port Location	Overall Ht.	For Use With	Temp. Range, ° F	Choose a Set Pressure, psi		Each		Each		Each
NPT Male Inlet and UNEF Female Relief Port







				Brass Body

				1/4	Bottom	600	3/4"-20	Top	2 5/8"	Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 165	22 , 35 , 50 , 75 , 100 , 125 , 150 , 200 , 250 , 300 , 350 , 400 , 450	49315K71	000000	49315K97	000000	49315K94	000000


				3/8	Bottom	600	3/4"-20	Top	2 5/8"	Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 165	22 , 35 , 50 , 75 , 100 , 125 , 150 , 200 , 250 , 300 , 350 , 400 , 450	49315K72	00000	49315K98	00000	49315K94	00000
				1/2	Bottom	600	3/4"-20	Top	2 13/16"	Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 165	22 , 35 , 50 , 75 , 100 , 125 , 150 , 200 , 250 , 300 , 350 , 400 , 450	49315K73	00000	49315K98	00000	49315K96	00000

Pressure-Regulating Valves for Cryogenic Liquids

These valves can withstand the extreme cold of liquid argon, liquid carbon dioxide, liquid nitrogen, and liquid oxygen. All are cleaned and bagged for oxygen service and other high-purity applications. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range.

	Inlet			Outlet
	Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pressure Adjustment Method	End-to-End Lg.	For Use With	Temp. Range, ° F	Choose an Outlet Pressure, psi		Each
NPT Female







				Brass Body—Bronze Diaphragm and PTFE Seal

				1/4	Side	600	1/4	Side	Screw	1 3/4"	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 150	15 to 65 , 75 to 175 , 100 to 250	47435K31	0000000


				3/8	Side	600	3/8	Side	Screw	1 3/4"	Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen	-320 to 150	15 to 65 , 75 to 175 , 100 to 250	47435K32	000000

Vacuum Breakers 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-breaking valves, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.

Diaphragm Check Valve

								Material			CPVC Body				PVC Body
	Inlet Pipe Size	Outlet Pipe SIze	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	End-to-End Lg.	Seal	DIaphragm	For Use With	Temp. Range, ° F	Color		Each	Temp. Range, ° F	Color		Each
NPT Female Inlet × NPT Female Outlet



		1/2	1/2	80	Not Rated	100 psi @ 75° F	1	4 5/16"	Fluoroelastomer	Fluoroelastomer	Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon	40 to 180	Light Gray	1868N13	0000000	40 to 140	Gray	1868N1	0000000


		3/4	3/4	80	Not Rated	100 psi @ 75° F	1	4 5/8"	Fluoroelastomer	Fluoroelastomer	Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon	40 to 180	Light Gray	1868N14	000000	40 to 140	Gray	1868N11	000000
		1	1	80	Not Rated	100 psi @ 75° F	1	5 1/8"	Fluoroelastomer	Fluoroelastomer	Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon	40 to 180	Light Gray	1868N15	000000	40 to 140	Gray	1868N12	000000

Spring-Loaded Piston Check Valve

								Material				CPVC Body				PVC Body
	Inlet Pipe Size	Outlet Pipe SIze	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	End-to-End Lg.	Seal	Piston	Spring	For Use With	Temp. Range, ° F	Color		Each	Temp. Range, ° F	Color		Each
NPT Female Inlet × NPT Female Outlet



		1 1/2	1 1/2	80	Not Rated	100 psi @ 75° F	1	7 15/16"	Fluoroelastomer	CPVC	Polymer	Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon	40 to 180	Light Gray	1868N18	0000000	—	—	———	0


		2	2	80	Not Rated	100 psi @ 75° F	1	8 1/2"	Fluoroelastomer	PVC	Polymer	Beverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon	—	—	———	0	40 to 140	Gray	1868N17	0000000

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

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.

For Carbon Dioxide


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

Chrome-Plated Brass Body—Chrome-plated valves add a layer of corrosion resistance.

Single Stage—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—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.

	Inlet					Outlet
	CGA No.	Location	Thread Direction	Pressure Gauge Reading Range, psi	No. of Stages	For Tube OD	Location	Pressure Range, psi	Pressure Adjustment Method	Temp. Range, ° F		Each
NGO Female Inlet × Swagelok® Female Outlet







				Brass Body—316 Stainless Steel Diaphragm and PTFE Seal

				320	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 15	Knob	-20 to 120	7951A72	0000000


				320	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 125	Knob	-20 to 120	7951A73	000000
				320	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 125	Knob	-20 to 120	7951A69	000000




						Chrome-Plated Brass Body—316 Stainless Steel Diaphragm and PTFE Seal

						320	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 15	Knob	-20 to 120	7951A63	000000


						320	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 50	Knob	-20 to 120	7951A34	000000
						320	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 15	Knob	-20 to 120	7951A66	000000
						320	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 50	Knob	-20 to 120	7951A67	000000
						320	Side	Right Hand	0 to 4,000	Two	1/4"	Side	0 to 125	Knob	-20 to 120	7951A68	000000

Vacuum-Regulating Valves for Air and Inert Gas

Throttle a high vacuum source to maintain a lower vacuum level in your system. Adjust the outlet vacuum level within the range. All valves have a gauge port.

	Inlet		Outlet
	Pipe Size	Location	Pipe Size	Location	Vacuum Range, in. Hg	Vacuum Adjustment Method	Vacuum Gauge Included	End-to-End Lg.	For Use With	Temp. Range, ° F		Each
NPT Female







				Brass Body—EPM Rubber Diaphragm and Buna-N Seal

				1/4	Bottom	1/4	Side	0 to 15	Screw	No	1 3/4"	Air, Carbon Dioxide, Inert Gas, Nitrogen	-20 to 180	5021K14	0000000


				1/4	Bottom	1/4	Side	10 to 30	Screw	No	1 3/4"	Air, Carbon Dioxide, Inert Gas, Nitrogen	-20 to 180	5021K24	000000

Tank-Mount Pressure-Regulating Valves for Cryogenic Cylinders

Automatically reduce a high inlet pressure from compressed gas tanks to a lower, stable outlet pressure. These valves can remove gases from liquid cryogenic cylinders. 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. They are single stage and reduce pressure in one step, which causes the outlet pressure to fluctuate slightly as you empty the tank.

		Inlet				Outlet
	For Use With	CGA No.	Location	Thread Direction	No. of Stages	Thread Size	Location	Thread Direction	Pressure Range, psi	Pressure Adjustment Method	Temp. Range, ° F		Each
UNF Male Outlet × NGO Female Inlet







				Brass Body—Stainless Steel Diaphragm and PTFE Seal

				Carbon Dioxide	320	Side	Right Hand	Single	9/16"-18	Bottom	Right Hand	0 to 350	T-Handle	-20 to 120	7897A83	0000000

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

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.

For Argon and Argon/Carbon Dioxide Blend

Male Inlet × Female

Outlet With One

Flowmeter

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

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



		580	Side	Right Hand	0 to 3,000	Single	5/8"-18	Side	Right Hand	0 to 70 scfh (Argon), 0 to 70 scfh (Argon/Carbon Dioxide Blend)	1	Brass	PTFE	Neoprene	78595A5	0000000

Valve Union Fittings

		Each
Adapter	78595A49	000000

For Argon, Argon/Carbon Dioxide Blend, and Helium

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

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



		580	Side	Right Hand	0 to 3,000	Two	5/8"-18	Side	Right Hand	0 to 40 scfh (Argon), 0 to 40 scfh (Argon/Carbon Dioxide Blend), 0 to 150 scfh (Helium)	1	Brass	PTFE	Neoprene	78595A495	0000000

Valve Union Fittings

		Each
Adapter	78595A49	000000

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

Male Inlet × Female

Outlet With One

Flowmeter

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

	Inlet					Outlet					Material
	CGA No.	Location	Thread Direction	Pressure Gauge Reading Range, psi	No. of Stages	Thread Size	Location	Thread Direction	Flow Range	No. of Flowmeters	Body	Seal	Diaphragm		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 scfh (Argon) 0 to 60 scfh (Argon/Carbon Dioxide Blend) 0 to 50 scfh (Carbon Dioxide) 0 to 160 scfh (Helium)	1	Brass	Buna-N	Brass	78595A394	0000000

Valve Union Fittings

		Each
Adapter	78595A49	000000

For Carbon Dioxide

Female Inlet ×

Female Outlet With

One Flowmeter

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

	Inlet					Outlet					Material
	CGA No.	Location	Thread Direction	Pressure Gauge Reading Range, psi	No. of Stages	Thread Size	Location	Thread Direction	Flow Range	No. of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Female Inlet



		320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 scfh to 70 scfh	1	Brass	PTFE	Neoprene	78595A46	0000000

Valve Union Fittings

		Each
Adapter	78595A49	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 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