A vacuum line or system, oil return

1 oil steam flow back into the vacuum line or system.

2 oil vapor pressure.

3 when the pump stops, the oil reflux

The 4 valve plate seal damage

5 gas pipeline bottom seal corrosion or damage

Solution > <

1 cleaning pump for compliance with the requirements of the oil

2 cleaning pump for compliance with the requirements of the oil

3 inspection and replacement of valve

4 replacement shutoff valve

5 replacement exhaust pipeline, repairing seals

Issue two, the vacuum line or system return oil

1 short of oil

2 pumping port and exhaust port error connection

3 oil pipeline plugging

4 pump problems

5 pump in a foreign substance blockage

6 ambient temperature reaches or exceeds the oil vapor pressure

7 steam pressure is lower than the index

8 gas temperature too high

Solution > <

The 1 gas

2 gas pipeline and an air pumping opening connection

3 off pump, cleaning and replacement with the requirements of the oil

4 goods to replace oil pump repair

5 clean up pump

6 lower environment temperature and air circulation

7 changing to meet the requirements of the pump oil

8 change process or with cooling system

Issue three, exhaust gas near the pump leakage

The 1 exhaust port type O seal damage

2 tank surface sealing pad damaged

The 3 surface of the pump body seal pad damaged

Solution > <

1 replacement of a new sealing ring

2 replacement tank surface sealing pad

3 replacement tank surface sealing pad

Issue four, smoke or mist is overweight

1 excessive oil

2 gas ballast valve open

3 oil filter damage

Solution > <

1 reduction in oil

2 turn off gas valve

3 replacement oil filter

Solution > <

Issue five,

1 dirty oil in the process of pollution

2 oil is not suitable

3 oil shortage

The 4 vacuum leakage is too large

5 protective inert gas shortage

Solution > <

1 replacement pump oil or cleaning

2 after cleaning with provisions of the oil pump

3 add enough oil pump

4 repair leaks, or replace pump oil

5 process containing corrosive, dangerous or radioactive gas must be with enough protection gas

Issue six, stop pump system in air

1 system leakage

The 2 sealing valve damage

Solution > <

1 repair parts

The 2 sealing valve repair

Issue seven, abnormal noise

The 1 connector damage

2 short of oil

3 pump worn or damaged

4 blade damage

The 5 exhaust valve plate without filter

6 problems of motor bearing

Solution > <

1 replacement connections

The 2 gas

3 repair or replacement of oil pump

4 remove the pump oil, Replacement Blades

5 plus screens

6 motor repair

Issue eight, pump oil consume too much

The 1 oil outlet seal ring wear

The 2 seal damage or installation error

3 oil casing damage or corrosion

The 4 oil inlet and oil outlet leakage

5 pump body and the seal between the gasket leak

Solution > <

The 1 seal replacement

2 replacement of oil seal, oil inlet pipeline inspection

3 replacing oil set

4 new O ring

5 replacement gasket

Issue nine, the pump can not be started

The 1 pump stuck

2 pump oil of high viscosity

3 pump wear or foreign material agglomeration

4 motor voltage mismatch

The 5 connection error

6 motor error

Solution > <

1 remove pump repair

2 keep the temperature higher than 12 degrees or oil

3 replacement of damaged or cleaning

4 replacement motor

5 check and repair line

6 replacement motor

Issue ten, the pump can not reach the limit vacuum degree

1 gas ballast valve open

The 2 suction pipe is too small

The 3 exhaust pipe diameter less than the diameter of outlet

4 vacuum system leaks

5 main valve problem

6 oil is not suitable

7 oil contaminated or the oil is too little

8 delivery pipe plug

9 shaft oil seal damage

The 10 baffle installation error

The 11 exhaust valve failure

12 vacuum gauge damage

Solution > <

1 turn off gas valve

2 replacement of suitable diameter suction tube

3 replacement of suitable diameter exhaust pipe

4 repair system leak

5 repair main valve

6 in accordance with the provisions of the oil

7 the oil or gas

8 open the pump body repair

9 oil seal replacement

10 remove installed correctly

11 replacement exhaust valve

12 repair vacuum gauge