Tank Flowmeters | McMaster-Carr

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For Use With

Inlet CGA Number

Maximum Inlet Pressure Gauge Reading

Stage

Outlet Connection Port

Inlet Gender

Number of Flowmeters

Outlet Gender

Outlet Thread Size

Shape

Inlet Thread Direction

Diaphragm Material

Inlet Connection Port

Maximum Temperature

Flow Coefficient (Cv)

Mounting Location

Outlet Thread Direction

Seal Material

Inlet Thread Size

Minimum Temperature

Number of Gauge Ports

DFARS Compliance

Gauge Port Location

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19 Products

About Gas Regulators

Male Inlet × Female Outlet With One Flowmeter

Female Inlet × Female Outlet With One Flowmeter

Male Inlet × Female Outlet With Two Flowmeters

Female Inlet × Male Outlet With One Flowmeter

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.

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 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

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 70	1	Brass	PTFE	Neoprene	00000000	0000000

Optional Adapter

00000000

Each

000000

For Use With Argon and Argon/Carbon Dioxide Blend

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 Female Inlet
CGA 320	Side	Right Hand	0 to 3,000	Single	5/8"-18	Side	Right Hand	0 to 50 (Argon), 0 to 38 (Argon/Carbon Dioxide Blend)	1	Brass	PTFE	Neoprene	000000000	0000000

Optional Adapter

00000000

Each

000000

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) to150	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 Carbon Dioxide

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 Female Inlet
CGA 320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 70	1	Brass	PTFE	Neoprene	00000000	0000000

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

For Use With 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 Male Outlet × NGO Female Inlet
CGA 350	Side	Left Hand	0 to 3,000	Single	9/16"-18	Side	Left Hand	0 to 40	1	Brass	PTFE	Neoprene	000000000	0000000

Optional Adapter

00000000

Each

000000

For Use With Nitrogen

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	1	Brass	PTFE	Neoprene	00000000	0000000

Optional Adapter

00000000

Each

000000

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

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

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 Use With Argon

Female Outlet × Male Inlet

Female Outlet × Male Inlet With Hose

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Flow Gauge Included	Body	Seal	Diaphragm	Includes		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	Yes	Brass	PTFE	Neoprene	__	0000000	0000000
CGA 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	0000000	000000
CGA 580	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 100	Yes	Brass	PTFE	Neoprene	__	0000000	000000

For Use With Carbon Dioxide

Female Outlet × Female Inlet

Female Outlet × Female Inlet With Hose

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Flow Gauge Included	Body	Seal	Diaphragm	Includes		Each
UNF Female Outlet × NGO Female Inlet
CGA 320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 60	Yes	Brass	PTFE	Neoprene	__	0000000	0000000
CGA 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	0000000	000000
CGA 320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 100	Yes	Brass	PTFE	Neoprene	__	0000000	000000

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About Gas Regulators

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

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