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About Gas Regulators
More
Tank-Mount Pressure-Regulating Valves for Fuel Gases
- For Use With: See Table
- Temperature Range: -20° to 120° F
Attach these valves to acetylene, hydrogen, methane, propane, or propylene tanks to reduce a high inlet pressure to a lower, stable outlet pressure. 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 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.




Inlet | Outlet | Material | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CGA Number | Location | Thread Direction | Pressure Gauge Range, psi | Thread Size | Location | Thread Direction | Pressure Range, psi | Pressure Adjustment Method | Body | Seal | Diaphragm | Each | |
For Use With Acetylene | |||||||||||||
UNF Male Outlet × NGO Female Inlet | |||||||||||||
CGA 300 | Side | Right Hand | 0 to 400 | 9/16"-18 | Side | Left Hand | 0 to 15 | Knob | Brass/Steel | PTFE | Rubber | 0000000 | 0000000 |
CGA 300 | Side | Right Hand | 0 to 400 | 9/16"-18 | Side | Left Hand | 0 to 15 | T-Handle | Brass | PTFE | Rubber | 000000 | 000000 |
UNF Male Outlet × NGO Male Inlet | |||||||||||||
CGA 510 | Side | Left Hand | 0 to 400 | 9/16"-18 | Side | Left Hand | 0 to 15 | Knob | Brass/Steel | PTFE | Rubber | 0000000 | 000000 |
CGA 510 | Side | Left Hand | 0 to 400 | 9/16"-18 | Side | Left Hand | 0 to 15 | T-Handle | Brass | PTFE | Rubber | 000000 | 000000 |
CGA 510 | Side | Left Hand | 0 to 400 | 9/16"-18 | Side | Left Hand | 0 to 15 | T-Handle | Brass | PTFE | Stainless Steel | 0000000 | 000000 |


Inlet | Outlet | Material | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CGA Number | Location | Thread Direction | Pressure Gauge Range, psi | Thread Size | Location | Thread Direction | Pressure Range, psi | Pressure Adjustment Method | Body | Seal | Diaphragm | Each | |
For Use With Acetylene | |||||||||||||
UNF Male Outlet × NGO Female Inlet | |||||||||||||
CGA 300 | Side | Right Hand | 0 to 400 | 9/16"-18 | Side | Left Hand | 0 to 15 | T-Handle | Brass | PTFE | Stainless Steel | 0000000 | 0000000 |
CGA 300 | Side | Right Hand | 0 to 400 | 9/16"-18 | Side | Left Hand | 0 to 15 | T-Handle | Brass/Steel | PTFE | Rubber | 000000 | 000000 |
UNF Male Outlet × NGO Male Inlet | |||||||||||||
CGA 510 | Side | Left Hand | 0 to 400 | 9/16"-18 | Side | Left Hand | 0 to 15 | T-Handle | Brass | PTFE | Stainless Steel | 0000000 | 000000 |
CGA 510 | Side | Left Hand | 0 to 400 | 9/16"-18 | Side | Left Hand | 0 to 15 | T-Handle | Brass/Steel | PTFE | Rubber | 0000000 | 000000 |
Pressure-Regulating Valves for Fuel Gases

- For Use With: See Table
- Temperature Range: See Table
Install these valves directly in gas distribution pipelines for acetylene, hydrogen, or propane. They automatically reduce a high inlet pressure to a lower, stable outlet pressure. Valves have two outlets to fit various pipe configurations and come with a plug to close the unused outlet. The gauge monitors outlet pressure. All valves are single stage and reduce pressure in one step, which causes the outlet pressure to fluctuate.
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.
Inlet | Outlet | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
For Use With | Pipe Size | Location | Max. Pressure, psi | Pipe Size | Location | Pressure Adjustment Method | Pressure Gauge Range, psi | Temperature Range, ° F | End-to-End Lg. | Port-to-Port Lg. | Each | |
NPT Female | ||||||||||||
Brass Body—Neoprene/Nylon Diaphragm and Neoprene Seal | ||||||||||||
Acetylene | 1/4 | Side | 350 | 1/4 | Bottom, Side | Knob | 0 to 30 | -20° to 120° | 2.60" | 1.32" | 0000000 | 0000000 |
Welding Gas Check Valves for Regulators

Stop the reverse flow of gas in your regulator. Check valves do not stop flashbacks.
Max. Pressure, psi | Male Hose Connection | Male Pipe Connection | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Acetylene | Hydrogen | Propane | Thread Direction | Thread Size | Thread Type | Thread Direction | Pipe Size | Thread Type | Material | Each | |
50 | 50 | 50 | Right Hand | 9/16"-18 | UNF | Left Hand | 1/4 | NPT | Brass | 000000 | 000000 |
Welding Gas Check Valves for Torches

Stop the reverse flow of gas in your torch. Check valves do not stop flashbacks.
Welding Gas Flashback Arresters for Torches

These arresters attach directly to torches that cut steel up to 8" thick. They extinguish flames and have a check valve to stop reverse gas flow. They are reusable; resetting is not required after flashback.
Arresters with right-hand threads are for use with oxygen; arresters with left-hand threads are for use with acetylene, hydrogen, and propane.
Max. Pressure, psi | Male Hose Connection | Female Hose Connection | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Acetylene | Hydrogen | Propane | Thread Size | Thread Type | Thread Size | Thread Type | Material | Specifications Met | Each | |
15 | 50 | 50 | 9/16"-18 | UNF | 9/16"-18 | UNF | Brass | European Safety Specification EN730, ISO 5175 Class 1 | 00000000 | 000000 |
Max. Pressure, psi | Male Hose Connection | Female Hose Connection | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Oxygen | Acetylene | Hydrogen | Propane | Thread Size | Thread Type | Thread Size | Thread Type | Material | Specifications Met | Pair | |
143 | 15 | 50 | 50 | 9/16"-18 | UNF | 9/16"-18 | UNF | Brass | European Safety Specification EN730, ISO 5175 Class 1 | 00000000 | 000000 |
Welding Gas Flashback Arresters for Regulators

Attach these arresters to the outlet connection of a regulator on a torch that cuts steel up to 11" thick. Arresters extinguish flames and have a check valve to stop reverse gas flow. They are reusable; resetting is not required after flashback.
Arresters with right-hand threads are for use with oxygen; arresters with left-hand threads are for use with acetylene, hydrogen, and propane.
Max. Pressure, psi | Male Hose Connection | Female Hose Connection | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Acetylene | Hydrogen | Propane | Thread Size | Thread Type | Thread Size | Thread Type | Material | Specifications Met | Each | |
15 | 50 | 50 | 9/16"-18 | UNF | 9/16"-18 | UNF | Brass | European Safety Specification EN730, ISO 5175 Class 1 | 00000000 | 000000 |
Max. Pressure, psi | Male Hose Connection | Female Hose Connection | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Oxygen | Acetylene | Hydrogen | Propane | Thread Size | Thread Type | Thread Size | Thread Type | Material | Specifications Met | Pair | |
143 | 15 | 50 | 50 | 9/16"-18 | UNF | 9/16"-18 | UNF | Brass | European Safety Specification EN730, ISO 5175 Class 1 | 00000000 | 000000 |