LPG Multivalve

Figure 1

The service valve is included in the Multivalve. The tank service valve is when propane vapor enters the gas system for the user by downstream of LP Gas appliances. All ASME propane tanks have a service valve that functions as a primary shut-off device used in vapor service systems. Proper operation of the service valve is important for safety reasons and gas utilization. If you smell propane in your house, the service valve should be turned off immediately!

Understanding the Propane Service Valve

The propane service valve is the controlling mechanism allowing propane gas to flow into the house or building through the gas piping system. Although other gas valves may be present throughout the gas plumbing, the propane tank's service valve controls 100% of the gas flow into the gas system. Propane service valves function as the "on / off switch" in propane gas systems and only for vapour service.

Tank Service Valve Operation

The operation of a propane tank service valve is similar to a water faucet. The operational part of the valve consists of a handwheel that closes and opens gas flow by turning the wheel clockwise and counter-clockwise. Inside the valve are a stem and seat that, when opened, allows gas to exit the tank and stops the flow of gas when closed. Although it may seem that the functionality of a service valve is identical to a water faucet, it has one very distinct difference. Proper propane use requires an LP Gas regulator, which reduces the amount of pressure introduced into the gas service line to a safe and acceptable level for the application requirements. In other words, the service valve is only used to turn the gas on or off, not for regulating the flow of gas.

Service Valve Repair and Replacement

Gas service valves are subject to wear and tear like all moving parts. When these essential valves leak, malfunction or fail, they need to be repaired or replaced. Repairing a service valve is much easier and cheaper than replacing one, but this has to be performed by a gas service technician. Depending on the age, type and make of the service valve, repair kits are often available through licensed propane companies and can be used to replace faulty parts. These repair kits commonly consist of several independent parts that may not all be used to fix the valve's problem. If the entire LP Gas service valve needs to be replaced, the propane tank must be empty. When repair kits are used to correct a malfunctioning valve part, the severity of the problem will dictate whether or not a tank needs to be empty when repairing or replacing the faulty component (s) of a propane tank service valve.

Order information

You can buy the valve directly here on our website including our advice, or directly on the REGO website

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