For the equipment we often use, we need to carry out a series of regular maintenance, so for the vacuum pump, the most important thing is to do a good job in the inspection of its shaft seal. The specific work steps may not be particularly understood by you, mainly including the following contents:

1. Check that the exhaust safety valve of low pressure cylinder is complete without air suction.

2. Vacuum break door closed, no leakage.

3. The steam side drain valve of the condenser is closed without leakage.

4. The water level gauge of vacuum system will not break or leak.

5. Whether the water seal, pipe, flange or welding joint of vacuum system valve is not tight, especially the pipeline and valve door from expansion tank or boiler starting separator to condenser.

6. Check whether there is air leakage at the connection between the extraction pipe and the cylinder in the vacuum state. The vacuum drops when the load decreases and the vacuum rises slightly after the load increases.

7. Check whether the water level of the low-pressure heater under the negative pressure state of the water ring vacuum pump is normal and whether the drain door is tight.

8. Check whether the gravity return water of the speed regulating feed pump is led into the condenser. If the return water volume is small and the water seal bag cannot be sealed, the gravity return water of the vacuum pump sealing water should be poured into the trench.

These contents aim at different systems of water ring vacuum pump. If there are similar problems in use, we can start from these to solve the problems faster and maintain the equipment well. We should pay more attention to this problem in the future operation to avoid unnecessary loss of equipment.