FRP centrifugal pump troubleshooting

FRP centrifugal pump failure reasons and troubleshooting

Symptoms 		cause of issue Method of exclusion
1, the pump does not water a, import and export valves are not open, out of the pipeline blocked, runner impeller blocked.
b, the motor is running in the wrong direction, the motor phase loss is very slow.
c, suction tube leakage.
d, the pump is not filled with liquid, there is air in the pump chamber.
e, imported insufficient water supply, suction stroke is too high, the valve leaks.
f, pipe resistance is too large, improper pump selection. 		a, check, remove the blockage.
b, adjust the motor direction, tighten the motor wiring.
c, tighten the sealing surface, remove leakage.
d, filled with liquid and open the exhaust valve, drain the air.
e, downtime, inspection, adjustment (water pipe or suction pipe with easy to use this phenomenon).
f, reduce pipe corners, re-select the pump.
2, insufficient pump flow a, first press 1. reasons to check.
b, pipes, pump impeller blockage, scale deposition, the valve opening is not enough.
c, the voltage is low.
d, impeller wear. 		a, first press 1. exclude.
b, remove the blockage, readjust the valve opening.
c, regulator.
d, replace the impeller.
3, the power is too large a, more than the rated flow use.
b, suction is too high.
c, pump bearing wear. 		a, adjust the flow, off the small outlet valve.
b, reduce.
c, replace the bearing.
4, noise vibration a, unstable pipe support.
b, liquid mixed with gas.
c, produce cavitation.
d, bearing damage.
e, the motor overload heating operation. 		a, a solid pipeline.
b, improve suction pressure exhaust.
c, reduce the degree of vacuum.
d, replace the bearing.
e, adjust press 5.
5, motor fever a, traffic is too large, overloaded operation.
b, rub rub.
c, motor bearing damage.
d, the voltage is insufficient. 		a, off the small outlet valve.
b, check and exclude.
c, replace the bearing.
d, regulator.
6, the pump leaks a, mechanical seal wear.
b, sand or cracked pump body.
c, sealing surface is not flat.
d, Loose mounting bolts. 		a, replace.
b, welding repair or replacement.
c, trimming.
d, fastening.

Trouble phenomenon Troubleshooting reasons 1, the pump does not water a, import and export of the valve is not open, out of the pipeline blockage, runner blockage.
b, the motor is running in the wrong direction, the motor phase loss is very slow.
c, suction tube leakage.
d, the pump is not filled with liquid, there is air in the pump chamber.
e, imported insufficient water supply, suction stroke is too high, the valve leaks.
f, pipe resistance is too large, improper pump selection. a, check, remove the blockage.
b, adjust the motor direction, tighten the motor wiring.
c, tighten the sealing surface, remove leakage.
d, filled with liquid and open the exhaust valve, drain the air.
e, downtime, inspection, adjustment (water pipe or suction pipe with easy to use this phenomenon).
f, reduce pipe corners, re-select the pump. 2, insufficient pump flow a, first press 1. Cause check.
b, pipes, pump impeller blockage, scale deposition, the valve opening is not enough.
c, the voltage is low.
d, impeller wear. a, first press 1. exclude.
b, remove the blockage, readjust the valve opening.
c, regulator.
d, replace the impeller. 3, the power is too large a, more than the rated flow.
b, suction is too high.
c, pump bearing wear. a, adjust the flow, off the small outlet valve.
b, reduce.
c, replace the bearing. 4, noise vibration a, unstable pipe support.
b, liquid mixed with gas.
c, produce cavitation.
d, bearing damage.
e, the motor overload heating operation. a, a solid pipeline.
b, improve suction pressure exhaust.
c, reduce the degree of vacuum.
d, replace the bearing.
e, adjusted by 5.5, the motor heat a, flow is too large, overload operation.
b, rub rub.
c, motor bearing damage.
d, the voltage is insufficient. a, off the small outlet valve.
b, check and exclude.
c, replace the bearing.
d, regulator. 6, pump leaking a, mechanical seal wear.
b, sand or cracked pump body.
c, sealing surface is not flat.
d, Loose mounting bolts. a, replace.
b, welding repair or replacement.
c, trimming.
d, fastening.

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