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high pressure fire water pump without liquid supply, analysis of supply or pressure shortage

Author: admin Source: The internet Posted On: 2018/7/13 15:57:25

high pressure fire water pump without liquid supply, analysis of supply or pressure shortage
1. The pump is not filled with water or is not properly vented
Solution Reference: Check that the pump casing and inlet lines are all filled with liquid;
2, the suction is too high
Solution Reference: Check the existing net indenter;
3, the system head is too high
Solution Reference: Check the head of the system (especially the friction loss);
4, there is leakage in the air or inlet pipeline
Solution Reference: Check the inlet line for air pockets and/or air leaks;
5, the impeller or pipeline is blocked
Solution reference: check for obstacles;
6, the direction of rotation is wrong
Solution reference: check the direction of rotation;
7. The bottom valve or inlet tube is not deep enough
Solution Reference: Consult the manufacturer for the correct immersion depth. Use a baffle to eliminate eddy currents
8. The packing or seal in the stuffing box is worn out, causing air to leak into the pump casing.
Solution Reference: Check the packing or seal and replace as needed to check if the lubrication is normal;
9. Insufficient suction head when pumping hot or volatile liquids
Solution reference: increase the suction head and consult the manufacturer;
10, the bottom valve is too small
Solution Reference: Install the correct size bottom valve;
11, the impeller diameter is too small
Solution reference: Consult the manufacturer for the correct impeller diameter;
12, the impeller gap is too large
Solution Reference: Check if the gap is correct;
13, impeller damage
Solution Reference: Check the impeller and replace it as required;
14, the speed is too low
Solution Reference: Check if the motor wiring is correct, the voltage is normal or the turbine pressure of the turbine is normal;
15, the pressure gauge position is not correct
Solution Reference: Check that the position is correct and check the outlet nozzle or pipe.



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