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About Gas Regulators
More
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.


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 | ||||||||||||
9/16"-18 UNF Male Outlet × NGO Male Inlet | ||||||||||||
CGA 580 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 145 | Knob | Brass/Steel | PTFE | Rubber | 0000000 | 0000000 |
For Use With Oxygen | ||||||||||||
9/16"-18 UNF Male Outlet × NGO Female Inlet | ||||||||||||
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 145 | Knob | Brass/Steel | PTFE | Rubber | 0000000 | 000000 |
For Use With Air | ||||||||||||
9/16"-18 UNF Male Outlet × NGO Male Inlet | ||||||||||||
CGA 590 | Side | Left Hand | 0 to 4,000 | Side | Left Hand | 0 to 145 | Knob | Brass/Steel | PTFE | Rubber | 0000000 | 000000 |



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 | ||||||||||||
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/Steel | PTFE | Rubber | 0000000 | 0000000 |
For Use With Carbon Dioxide | ||||||||||||
5/8"-18 UNF Female Outlet × NGO Female Inlet | ||||||||||||
CGA 320 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 125 | T-Handle | Brass/Steel | PTFE | Rubber | 0000000 | 000000 |
For Use With Oxygen | ||||||||||||
9/16"-18 UNF Male Outlet × NGO Female Inlet | ||||||||||||
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 125 | T-Handle | Brass/Steel | PTFE | Rubber | 000000 | 000000 |
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.


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 |
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 |
For Use With Propane and Propylene | |||||||||||||
UNF Male Outlet × NGO Male Inlet | |||||||||||||
CGA 510 | Side | Left Hand | 0 to 400 | 9/16"-18 | Side | Left Hand | 5 to 50 | Knob | Brass/Steel | PTFE | Rubber | 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/Steel | PTFE | Rubber | 000000 | 0000000 |
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/Steel | PTFE | Rubber | 0000000 | 000000 |
For Use With Propane and Propylene | |||||||||||||
UNF Male Outlet × NGO Male Inlet | |||||||||||||
CGA 510 | Side | Left Hand | 0 to 400 | 9/16"-18 | Side | Left Hand | 0 to 50 | T-Handle | Brass/Steel | PTFE | Rubber | 0000000 | 000000 |