Serial number

Symptoms

the reason

Approach

1

Pump does not absorb oil

1, the suction pipe is blocked or leaked
2, inhalation height exceeds the height of the vacuum allowed to inhale
3, the motor reversal
4, medium viscosity is too large

1, overhaul suction line 2, reduce the inhalation height
3, change the motor steering
4, the media warming

2

Gauge pointer fluctuations

1, suction pipe leakage
2, the safety valve is not adjusted or the working pressure is too large, so that the safety valve open when closed

1, overhaul suction line
2, adjust the safety valve or reduce the working pressure

3

Traffic drops

1, the suction pipe is blocked or leaked
2, screw and pump wear
3, the safety valve spring is too loose or loose contact with the valve seat
4, the motor speed is not enough

1, overhaul suction line
2, serious wear and tear should be replaced parts
3, adjust the spring, grinding disc and valve seat 4, repair or replace the motor

4

Shaft power increased dramatically

1, the exhaust pipe is blocked
2, screw and pump set serious friction
3, medium viscosity is too large

1, stop the pump to clean the pipeline
2, repair or replacement of parts
3, the medium temperature

5

Pump vibration big

1, pump and motor do not mind
2, screw and pump sets of different heart or gap
3, there is gas pump
4, the installation height is too large, pump cavitation

1, adjust the concentricity
2, maintenance adjustment
3, overhaul suction line, remove the leak site
4, reduce the installation height or reduce the speed

6

Pump heats up

1, serious friction within the pump
2, mechanical seal back to the oil hole plugged
3, the oil temperature is too high

1, check the adjustment screw and pump sleeve
2, to clear the hole back
3, appropriate to reduce oil temperature

7

A large number of mechanical seals leak

1, the assembly location is wrong
2, sealing gland is not flat
3, moving ring or static ring seal surface bumps
4, moving ring or ring seal damage

1, re-install according to requirements
2, adjust the seal gland
3, grinding sealing surface or replace the new pieces
4, replace the seal

Serial number

Symptoms

the reason

Approach

1

Pump does not absorb oil

1, the suction pipe is blocked or leaked
2, inhalation height exceeds the height of the vacuum allowed to inhale
3, the motor reversal
4, medium viscosity is too large

1, overhaul suction line 2, reduce the inhalation height
3, change the motor steering
4, the media warming

2

Gauge pointer fluctuations

1, suction pipe leakage
2, the safety valve is not adjusted or the working pressure is too large, so that the safety valve open when closed

1, overhaul suction line
2, adjust the safety valve or reduce the working pressure

3

Traffic drops

1, the suction pipe is blocked or leaked
2, screw and pump wear
3, the safety valve spring is too loose or loose contact with the valve seat
4, the motor speed is not enough

1, overhaul suction line
2, serious wear and tear should be replaced parts
3, adjust the spring, grinding disc and valve seat 4, repair or replace the motor

4

Shaft power increased dramatically

1, the exhaust pipe is blocked
2, screw and pump set serious friction
3, medium viscosity is too large

1, stop the pump to clean the pipeline
2, repair or replacement of parts
3, the medium temperature

5

Pump vibration big

1, pump and motor do not mind
2, screw and pump sets of different heart or gap
3, there is gas pump
4, the installation height is too large, pump cavitation

1, adjust the concentricity
2, maintenance adjustment
3, overhaul suction line, remove the leak site
4, reduce the installation height or reduce the speed

6

Pump heats up

1, serious friction within the pump
2, mechanical seal back to the oil hole plugged
3, the oil temperature is too high

1, check the adjustment screw and pump sleeve
2, to clear the hole back
3, appropriate to reduce oil temperature

7

A large number of mechanical seals leak

1, the assembly location is wrong
2, sealing gland is not flat
3, moving ring or static ring seal surface bumps
4, moving ring or ring seal damage

1, re-install according to requirements
2, adjust the seal gland
3, grinding sealing surface or replace the new pieces
4, replace the seal

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