Vacuum degree indicates the thinness of gas in vacuum state. Usually expressed as absolute pressure and relative pressure. If the pressure in the measured equipment is lower than atmospheric pressure, a vacuum gauge is required for pressure measurement. The value read from the vacuum gauge is called vacuum degree.
The cause of vacuum degree failure of vacuum pump is not the only one, and our detection method is very single. The whole system has only one vacuum meter, which can only reflect the final pumping result of the system, but not the process quantity of each unit at a certain time, which brings a lot of inconvenience for fault finding and increases the troubleshooting time.
At present, the troubleshooting method is basically elimination method, and the steps are as follows:
1. Determine the accuracy of vacuum degree instrument of vacuum pump;
2. Ensure that the system shut-off valve is free of leakage;
3. If the fault is the manifestation of phenomenon I, it is necessary to check the external leakage of the whole system;
4. If the fault is the manifestation of phenomenon II, first check whether the parameters of steam, water and other energy media are abnormal. If not, check each check valve. If not, conduct system performance test to determine which stage of pump has performance problems, and check the nozzle and steam valve of the pump.
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