1.No liquid supply, inadequate supply of liquid or insufficient pressure :
1).There is no water injection or the appropriate exhaust
The elimination of measures: check the pump shell and the pipelines are all filled with liquid entrance.
2).Speed is too low
Elimination measures: check whether the motor wiring is correct, the voltage is normal or the turbine's steam pressure is normal.
3.System head is too high
Elimination measures: check the head of the system (especially friction loss).
4). The absorption process is too high.
Elimination of measures: check the existing net pressure head (inlet pipeline is too small or too long will cause a lot of friction loss).
5).Impeller or pipe by blocking
Elimination measures: check for obstacles.
6).Rotation direction is wrong
Elimination measures: check the direction of rotation.
7).Production of air or inlet pipeline leakage
The elimination of measures: check the entrance pipeline without cavitation and / or air leakage.
8).Packing or seal wear, so that the air leakage into the pump casing
Elimination measures: check the packing or seal and replace it as needed to check whether the lubrication is normal.
9).Pumping hot or volatile liquid when the suction head is insufficient
Elimination measures: increase the suction head, to the manufacturers advisory.
10).At the end of the valve is too small.
The elimination of measures: at the end of the valve installed in the correct size.
11).At the end of the valve entrance pipe or the immersion depth is not enough
Elimination measures: to the manufacturers to consult the correct depth of immersion. Using baffle to eliminate eddy current.
12). Clearance between the impeller
Elimination measures: check the gap is correct.
13). Impeller damage
Elimination measures: check the impeller, according to the requirements of the replacement.
14).Diameter of the impeller is too small
Elimination measures: to the manufacturers to consult the correct impeller diameter.
15) the position of the pressure gauge is not correct
Elimination measures: check the location is correct, check the outlet pipe mouth or pipe.
2.The fire pump running for a while then stop :
1).The absorption process is too high.
Elimination of measures: check the existing net pressure head (inlet pipeline is too small or too long will cause a lot of friction loss).
2).Impeller or pipe by blocking
Elimination measures: check for obstacles.
3).Production of air or inlet pipeline leakage
The elimination of measures: check the entrance pipeline without cavitation and / or air leakage.
4).Packing or seal wear, so that the air leakage into the pump casing
Elimination measures: check packing or seal and replace as needed. Check if the lubrication is normal.
5). Pumping hot or volatile liquid when the suction head is insufficient
Elimination measures: increase the suction head, to the manufacturers advisory.
6). At the end of the valve entrance pipe or the immersion depth is not enough
Elimination measures: to the manufacturers to consult the correct depth of immersion, with the baffle to eliminate eddy current.
7).Water pump casing seal damage
Elimination measures: check the seal gasket and replace it as required.
3.The fire pump power consumption is too large :
1).Rotation direction is wrong
Elimination measures: check the direction of rotation.
2).Impeller damage
Elimination measures: check the impeller, according to the requirements of the replacement.
3).By rotating parts
Elimination of measures: check the internal wear parts of the gap is normal.
4).Axis bending of
The elimination of measures: straightening shaft or replaced as required.
5). Speed is too high
Elimination measures: check the motor winding voltage or transfer to the turbine's steam pressure.
6). The head is lower than the rated value. Too much liquid
Elimination measures: to the manufacturers advisory. Install throttle valve, cutting impeller.
7) fluid is heavier than expected value
Elimination measures: check the specific gravity and viscosity.
8). The stuffing is not properly packing (packing, not properly inserted into or running, packing too tight)
Elimination measures: check the packing, refill stuffing box.
9).Bearing lubrication is not correct or bearing wear
Elimination measures: check and replace as required.
10).The running clearance between the wear ring is not correct.
Elimination measures: check the gap is correct. Replace the pump casing and / or impeller wear ring as required.
11).Pump casing pipe on the stress is too large
Elimination of measures: to eliminate the stress and the factory representative of the advisory. After eliminating the stress, check the condition of the.
