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As there are many types and types of vacuum furnace, the maintenance and overhaul items are different. The maintenance and inspection contents should be divided into the items of each furnace, daily, monthly, half a year and every year according to the actual needs according to the furnace technical documents. Shandong vacuum furnace company sent money to sum up the six points of each furnace, daily maintenance and repair items.

1. For the empty pump with gas ballast function, it should be checked before the furnace is turned on every day and opened for 30min according to the need, so as to drain the water in the pump oil.

2. Check the pressure of cooling water, compressed air, hydraulic system and the flow of cooling water regularly.

3. The rubber seal and flange surface of furnace door should be checked before closing the door. There should be no sand and debris. Wipe the rubber seal ring and flange surface with a thousand clean cloth, and then apply vacuum grease evenly before closing the furnace door.

4. The workpiece must be cleaned before being put into furnace. After oil quenching, the oil on the material frame and transport parts soaked in oil shall be cleaned.

5. The air-cooled motor is commonly used motor. It can not be started under vacuum. It can only be started after inflation, and it should be protected by electrical interlock protection device.

6. Roots pump can be started only when the vacuum is above 133pa, and it should also be protected by electrical interlock protection device.

In addition, for the pipeline with compressed air, the drain valve should be opened every day to discharge the accumulated water. Pay attention to whether the indication of the inlet and outlet water temperature of the cooling water is normal, and often check whether there is abnormal local temperature rise at the touch electrode joint, furnace door, transformer cooling water pipe, etc.