Cleaning the Vacuum Pump in a High-Temperature Sintering Furnace
Because the pump oil gradually deteriorates during long-term operation under harsh conditions, the oil level, contamination, and viscosity should be checked through the oil-view window, and the oil must be replaced in time.
Recommended oil-change interval: once every six months.
Pump Oil Replacement Procedure
- Open the pump’s intake pipe, and start the pump 5 seconds later.
This allows the remaining oil inside the pump to be discharged more easily. - Remove the exhaust pipe, then open the oil drain valve and drain out the used pump oil.
- Close the oil drain valve, and fill new pump oil from the oil-filling port.
- If the pump oil is heavily contaminated, add a small amount of new oil and run the pump for several minutes to rinse the inside.
If one rinse is insufficient, repeat the cleaning process multiple times. - After replacing with new oil, run the vacuum pump and allow the furnace temperature to rise.
Then check whether the vacuum limit pressure is normal. - During servicing, clean the filter screen as well.
Precautions During Operation
A. During long-term operation, the pump can reach high temperatures (40–80°C).
Do not touch the motor or pump body until they cool down to a safe temperature.
B. Cleaning rags and other maintenance materials must be stored in a designated area to prevent debris from being sucked into the pump.
C. If an emergency occurs during operation, immediately shut off the main power and perform troubleshooting.
D. Non-maintenance personnel are strictly prohibited from disassembling the vacuum pump parts.
E. If any abnormal condition appears, stop the equipment immediately.
Do not force operation under fault conditions.