Water motor gong, also known as sprinkler alarm or water motor alarm, is a hydromechanical automatic sound warning device actuated by water flow. It is usually conjunct with alarm check valve, dry pipe valve, or deluge valve to sound a local alarm.
While sprinkler system operates, water passes through the water motor gong, the impeller turns and the shaft rotates by high velocity water jet, and the rotating shaft drives a striker assembly which rings the gong, sounding a continuous alarm.
Main parts and feature
|Inlet||Drain outlet||Housing||Gong / gong support|
|3/4″, NPT or BSPT||1″, NPT or BSPT||Cast aluminum||Aluminum alloy|
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