When many people use the fire pump, fire pump can’t reach the pressure the fire pump required. The user will directly contact the fire pump manufacturer to solve it. However, the reason why water pump pressure is not enough is the water supply, and the outlet end is over-treated, a large amount of air in the pump chamber that is not discharged, or even error wiring methods.
For the lack of pressure on the fire pump, there are several possibilities and solutions for the pressure:
9 test methods:
1) Direction of rotation of the fire pump is wrong
Elimination measures: Check the direction.
2) The fire pump is not filled with water or properly exhausted
Elimination: Check if the pump casing and inlet lines are all filled with liquid.
3) The packing or seal in the stuffing box is worn out, causing air to leak into the pump casing.
Elimination measures: Check the packing or seal and replace as needed, check if the lubrication is normal.
4) There is a leak in the air or inlet line
Elimination measures: Check if inlet line has air pockets and/or air leakage.
5) Motor speed is too low
Elimination measures: Check if the motor wiring is correct, the voltage is normal or the stream pressure of the turbine is normal.
6) Insufficient suction head when pumping hot or volatile liquids.
7) System head is too high
Elimination measures: Check the head of the system (especially the friction loss).
8) Impeller or pipeline is blocked
Elimination measures: Check for obstacles.
9) Suction is too high
Elimination measures: Check the existing net head ( too small or too long the inlet line will cause a large friction loss).