Fire Lock Alarm Check Valve works as a check valve by preventing the reverse flow of water from the system piping to the water supply. The Alarm Check Valve is trimmed with a water bypass line, which has an in-line swing check valve. The Alarm Check Valve can be availed with excess pressure pump trim option as per the requirements. The Alarm Check Valve with the help of the bypass line allows pressure surges to enter the system and to be trapped above the alarm check valves clapper without the clapper lifting and causing false alarms.
