After long-term use of vacuum pump, if there is no routine maintenance, there will be some large or small problems, such as the exhaust port oil leakage, the main reason for the exhaust port oil leakage is exhaust filter problem.

1、 Causes of oil leakage of exhaust filter

1. The exhaust filter failed to filter and the oil and gas could not be completely separated.

2. The O-ring at the installation port of exhaust filter is not well sealed.

3. The exhaust filter is not installed in place. Shaft seal oil leakage and air leakage are common.

Warm tips: when the shaft seal is found to be worn and leaking, the shaft sealing ring must be replaced. Different types of pumps and different manufacturers have different shaft seal structures. It should be replaced with similar or the same sealing ring according to the original design. For example, when the standard parts of spring rubber ring are not seriously worn and air leakage is not serious, a few rings of fastening steel wire spring can be removed and then installed. In case of serious wear, replace the sealing ring with a new one according to the original diameter. O-type, J-type and jo-type sealing rings have standard series. Attention should be paid to the position safety and compression during assembly. Some rubber seals can also be self-made. Its inner and outer diameter can be obtained by measuring the shaft and shaft hole. The size should be slightly smaller, and the thickness should have room for pressing, so that it can be easily installed and locked by itself.

2、 Daily maintenance method of vacuum pump

1. From March to June, we need to change the special oil for vacuum pump. Each pump will indicate what oil is used when leaving the factory. To replace the original, do not mix

2. Change the exhaust filter, filter element and vacuum pump oil grid every 6 months.