The main reason for stopping the fire pump during operation and its solutions: 1) Exhaustion Suction Elimination measures: Check the existing net head pressure of the fire pump (inlet pipe is too small or too long will cause great friction loss). 2) impeller or pipeline plugging measures to eliminate: check the pump for any obstructions. 3) Air or inlet line leaks are eliminated. Check for cavitation and / or air leaks in the inlet line to the fire pump. 4) Stuffing or seal wear in stuffing box to allow air to leak into the pump casing. Remedy: Check packing or seal and replace as required. Check the lubrication of the pump is normal. 5) Insufficient suction head suction when hot or volatile liquid is drained Eliminate measures: Increase suction head of fire pump and consult manufacturer 6) Insufficient depth of immersion of bottom valve or inlet pipe Measures: Inquire the manufacturer about the correct immersion depth of the pump , With a baffle to eliminate eddy currents. 7) pump housing gasket damage to eliminate measures: Check the fire pump gasket and the situation required to be replaced.
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