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Fire pump is widely used in environmental protection, water treatment, fire and other departments to pump all kinds of liquid, then you know the fire pump in the work of the reasons for the lack of pressure? When this happens, it should What measures to take to resolve the following for you to analyze the reasons for the lack of pressure on the fire pump, and the use of what measures to solve. Fire pump pressure shortage causes and elimination measures 1) pump without water or without proper exhaust Elimination measures: Check the pump housing and inlet pipe are all filled with liquid. 2) too low speed Elimination measures: Check the motor wiring is correct, the voltage is normal or the turbine steam pressure is normal. 3) the system head too high Elimination measures: Check the system head (especially friction loss). 4) Suction too high Elimination measures: Check the existing net head (inlet pipe is too small or too long will cause great friction loss). 5) Impeller or pipeline plugging Elimination measures: Check for obstructions. 6) Direction of rotation is not the elimination of measures: Check the direction of rotation. 7) Air or inlet line leaks. Check for leaks in the inlet line for cavitation and / or air. 8) Stuffing or seal wear in the stuffing box to allow air to leak into the pump casing Elimination measures: Check the packing or seal and replace as required to check that the lubrication is normal. 9) When pumping hot or volatile liquid Inadequate suction head Elimination measures: Increase the suction head, consult the manufacturer. 10) Bottom valve too small Elimination measures: Install the correct size of the bottom valve. 11) At the end of the valve or inlet pipe immersion depth is not enough Elimination measures: Consult manufacturers for the correct immersion depth. Eliminate eddies with baffles. 12) impeller clearance is too large Elimination measures: check the gap is correct. 13) Impeller damage elimination measures: Check the impeller, as required replacement. 14) Impeller diameter is too small Elimination measures: Consult factory for correct impeller diameter. 15) Pressure gauge position is not correct Elimination measures: Check the location is correct, check the outlet nozzle or pipe. Extended reading: Top ten brands of motor China Construction Water Exhibition Pump manufacturers ranked ptc exhibition industry Internet (Xiamen) Technology Co., Ltd. Asia Pump Network Editor: He Daohui (QQ / WeChat:) http://beng.liuti.cn/ (service Hotline:)