How Seismic Shut-Off Valves Work

Seismic valves automatically shut off the gas to your building when an earthquake occurs.

Seismic Automatic Gas Shut-off valves are a simple, but effective way to ensure you never experience the terror of a gas fire after an earthquake. They operate on movement and shut-off the supply of gas to a building, when triggered by a 5.4 magnitude or larger earthquake. The operation of a Horizontal Seismic Valve can be seen in the illustration below:

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