Fire Protection · F-3K2S2

Double-Interlock Preaction Valve Detail

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An integrated double-interlocked supervised preaction system connects a fire main inlet valve with a tamper switch to a deluge valve of the Victaulic FireLock NXT 769 series with an auto-convert option. The assembly incorporates a water supply pressure gauge, a charge-line pressure gauge, an alarm pressure switch, and a low-pressure actuator offset to a nitrogen line. Control and testing components include a system isolation valve with a tamper switch, a drain connection kit, a system test drain, and an inspector test location routing to the preaction zone.

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