ISG Vertical Pipeline Centrifugal Pump Troubleshooting

Symptoms
Possible causes
Method of exclusion
1. ISG vertical pipeline centrifugal pump does not water
a , import and export valves are not open, out of the pipeline obstruction, flow impeller obstruction.
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, the pump cavity with air.
e, import 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, strong motor wiring
c, tighten the sealing surface, remove the air
d, open the pump cover or open the exhaust valve exhaust air
e, downtime inspection, adjustment (grid connection and suction with the use of easy to use this phenomenon
f, reduce pipe corners, re-select the pump.
2. ISG vertical pipe centrifugal pump insufficient flow
a , first press 1. reasons to check.
b, pipes, pump impeller impeller partially obstructed,
Scale deposition, the valve opening is not enough
c, the voltage is low
d, impeller wear
a , first press 1. exclude
b, remove the obstruction to re-adjust the valve opening.
c, regulator.
d, replace the impeller.
3. ISG vertical pipe centrifugal pump 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 small outlet valve.
b, reduce
c, replace the impeller
4. ISG vertical pipe centrifugal pump 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, increase suction pressure, exhaust
c, reduce the degree of vacuum
d, replace the bearing
e, finishing press 5.
5. ISG vertical pipeline centrifugal pump motor heat
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. ISG Vertical Pipeline centrifugal 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, strong.
Symptoms
Possible causes
Method of exclusion
1. ISG vertical pipeline centrifugal pump does not water
a , import and export valves are not open, out of the pipeline obstruction, flow impeller obstruction.
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, the pump cavity with air.
e, import 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, strong motor wiring
c, tighten the sealing surface, remove the air
d, open the pump cover or open the exhaust valve exhaust air
e, downtime inspection, adjustment (grid connection and suction with the use of easy to use this phenomenon
f, reduce pipe corners, re-select the pump.
2. ISG vertical pipe centrifugal pump insufficient flow
a , first press 1. reasons to check.
b, pipes, pump impeller impeller partially obstructed,
Scale deposition, the valve opening is not enough
c, the voltage is low
d, impeller wear
a , first press 1. exclude
b, remove the obstruction to re-adjust the valve opening.
c, regulator.
d, replace the impeller.
3. ISG vertical pipe centrifugal pump 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 small outlet valve.
b, reduce
c, replace the impeller
4. ISG vertical pipe centrifugal pump 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, increase suction pressure, exhaust
c, reduce the degree of vacuum
d, replace the bearing
e, finishing press 5.
5. ISG vertical pipeline centrifugal pump motor heat
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. ISG Vertical Pipeline centrifugal 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, strong.

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June 26, 2021

Symptoms	Possible causes	Method of exclusion
1. ISG vertical pipeline centrifugal pump does not water	a , import and export valves are not open, out of the pipeline obstruction, flow impeller obstruction. 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, the pump cavity with air. e, import 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, strong motor wiring c, tighten the sealing surface, remove the air d, open the pump cover or open the exhaust valve exhaust air e, downtime inspection, adjustment (grid connection and suction with the use of easy to use this phenomenon f, reduce pipe corners, re-select the pump.
2. ISG vertical pipe centrifugal pump insufficient flow	a , first press 1. reasons to check. b, pipes, pump impeller impeller partially obstructed, Scale deposition, the valve opening is not enough c, the voltage is low d, impeller wear	a , first press 1. exclude b, remove the obstruction to re-adjust the valve opening. c, regulator. d, replace the impeller.
3. ISG vertical pipe centrifugal pump 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 small outlet valve. b, reduce c, replace the impeller
4. ISG vertical pipe centrifugal pump 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, increase suction pressure, exhaust c, reduce the degree of vacuum d, replace the bearing e, finishing press 5.
5. ISG vertical pipeline centrifugal pump motor heat	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. ISG Vertical Pipeline centrifugal 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, strong.