About Flowmeters and Totalizers
Flowmeters measure the rate of flow for a liquid or a gas. Totalizers measure the cumulative flow volume. Flowmeter/totalizers display both the flow rate and the cumulative flow volume.
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About Gas Regulators
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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.


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 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 | PTFE | Rubber | 0000000 | 0000000 |
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 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 | 0000000 |
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—Stainless Steel Diaphragm and Neoprene Seal | ||||||||||||
Hydrogen, Propane | 1/4 | Side | 500 | 1/4 | Bottom, Side | T-Handle | 0 to 60 | 0° to 120° | 2.40" | 1.01" | 0000000 | 0000000 |
Hydrogen, Propane | 1/4 | Side | 500 | 1/4 | Bottom, Side | T-Handle | 0 to 200 | 0° to 120° | 2.40" | 1.01" | 0000000 | 000000 |
Totalizers for Natural, Propane, and Butane Gas

Often used in heating, cooking, and power-generating systems, these totalizers measure the total flow volume of natural gas, propane, and butane. They cannot be reset.
Pipe Connections | Flow Range, cfh | Accuracy | Max. Total Volume, cubic feet | Max. Pressure | Temp. Range, °F | Seal Material | Mounting Orientation | Display Type | Ht. | Wd. | Dp. | Each | |
Aluminum Body | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cubic Feet | |||||||||||||
3/4 NPT Female | 0 to 250 | ±1% | 999,900 | 5 psi @ 70° F | -30° to 140° | Buna-N Rubber | Horizontal | Analog | 13" | 9" | 9" | 0000000 | 0000000 |
1 1/4 NPT Male | 0 to 425 | ±1% | 999,900 | 10 psi @ 70° F | -30° to 140° | Buna-N Rubber | Horizontal | Analog | 13" | 9" | 9" | 0000000 | 000000 |
Propane Tank Refill Indicator Gauges

Know at a glance if your propane gas supply is running low. These gauges include an optional remote monitor that flashes red when fuel is low or leaking, helping prevent downtime and improve safety. Use the cable to place the monitor up to 30" from the gauge. These gauges work with tanks manufactured after 1995.
Inlet | Internal Outlet Connection | External Outlet Connection | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Thread Type | Gender | For Valve Type | CGA Number | Gender | Thread Size | Thread Type | Gender | Cable Lg. | Includes | Each | |
1 5/16"-5 | Acme | Female | POL/Acme (Type 1) | CGA 510 | Female | 1 5/16"-5 | Acme | Male | 30" | Remote Monitor (Requires 2 AAA Batteries) | 0000000 | 000000 |