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What are the maintenance methods of vacuum pump in high temperature vacuum drying oven?

1. The vacuum pump can't work for a long time. Therefore, when the vacuum degree reaches the requirements of drying articles, the vacuum valve should be closed first, and then the power supply of the vacuum pump should be closed. When the vacuum degree is less than the requirements of the dry goods, the vacuum valve and the power supply of the vacuum pump should be opened to continue to vacuum. In this way, the service life of the vacuum pump can be extended.

2. If the dry goods are wet, it is better to add a filter between the vacuum box and the vacuum pump to prevent the wet gas from being pumped into the vacuum pump, resulting in the failure of the vacuum pump.

3. If it is difficult to rotate the rubber plug of the vent valve, it can be lubricated with proper amount of grease.

4. The vacuum drying oven can not be vacuumized after being used for many times. At this time, the door seal should be replaced or the door buckle extension interval on the box should be adjusted to solve the problem. When the drying temperature of the vacuum box is higher than 200 ℃, slow air leakage may occur. At this time, remove the cover plate behind the box, loosen the heater base with hexagon wrench, replace the sealing ring or tighten the heater base.