CGA 346 Welding Gas Regulators

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	Inlet CGA Number Inlet CGA Number	Show

CGA 346

	Inlet CGA Number Inlet CGA Number	Hide

	For Use With For Use With

Breathable Air

	Maximum Outlet Pressure Maximum Outlet Pressure

	Maximum Outlet Pressure Gauge Maximum Outlet Pressure Gauge

	Maximum Inlet Pressure Maximum Inlet Pressure

3,000 psi

	Inlet Thread Direction Inlet Thread Direction

Right Hand

	Maximum Inlet Pressure Gauge Maximum Inlet Pressure Gauge

4,000 psi

	Inlet Pressure Gauge Included Inlet Pressure Gauge Included

Yes

	Shape Shape

	30° Elbow
	Straight

	Outlet Connection Type Outlet Connection Type


Pipe	Tube

	Inlet Thread Size Inlet Thread Size

0.825"-14

0.830"-14

	Minimum Outlet Pressure Minimum Outlet Pressure

0 psi

	Minimum Outlet Pressure Gauge Minimum Outlet Pressure Gauge

0 psi

	Minimum Temperature Minimum Temperature

-20° F

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Seal Material Seal Material

PTFE

PCTFE

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Gauge Port Location Gauge Port Location

Top

	Stage Stage

Single

Two

	Number of Gauge Ports Number of Gauge Ports

	Outlet Location Outlet Location

Side

	Inlet Connection Type Inlet Connection Type

	Hose

	Flow Coefficient (Cv) Flow Coefficient (Cv)

5 Products

About Gas Regulators

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.

Single-Stage Valves

Male Outlet × Female Inlet Single-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 Breathable Air
9/16"-18 UNF Male Outlet × NGO Female Inlet
CGA 346	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 125	T-Handle	Brass	PTFE	Rubber	0000000	0000000
CGA 346	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 × 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 Breathable Air
1/4 NPT Female Outlet × NGO Female Inlet
CGA 346	Side	Right Hand	0 to 4,000	Side	Right Hand	0 to 250	T-Handle	Brass	PTFE	Stainless Steel	00000000	0000000

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 Breathable Air

Female Outlet × Female Inlet Straight With Knob

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	For Tube OD	Location	Pressure Range, psi	Pressure Adjustment Method	Shape	Body	Seal	Diaphragm		Each
NGO Female Inlet × Swagelok® Female Outlet
CGA 346	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 1,500	Knob	Straight	Brass	PCTFE	Polyurethane	0000000	0000000
CGA 346	Side	Right Hand	0 to 4,000	Single	1/4"	Side	0 to 2,500	Knob	Straight	Brass	PCTFE	Polyurethane	0000000	000000

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About Gas Regulators

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

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