XD Series Rotary Vane Vacuum Pump Maintenance Method

The oil level and oil contamination should be checked frequently (once a week is recommended).

If the oil level is too low, stop the rotary vane vacuum pump and add suitable pump oil to 4/5 of the height of the oil window. If the oil is contaminated, the oil will turn black, emulsify, and thicken, so the oil should be changed in time.


Replace the pump oil and oil filter

For rotary vane vacuum pumps, it is recommended to change the oil after the pump has been working for 150 hours for the first time. Change the oil every 500 working hours thereafter. At the same time as the oil change, the oil filter should be changed. If the oil becomes black, emulsified, or thickened due to contamination, the oil should be changed in time. And clean the pump before adding new oil.


Cleaning and changing oil change steps:

  • Stop the pump to release the hot oil.

  • Screw on the drain plug and run for 5-10 seconds.

  • Drain the oil.

  • Inject cleaning oil (ordinary mechanical oil) to 3/4 of the height of the oil window.

  • Run the pump for 5-10 minutes.

  • Stop the pump and drain the oil. If the oil still cannot meet the requirements, repeat steps 4 and 5.

  • Screw on the drain plug and run 5-10 seconds.

  • Drain the oil.

  • Inject new pump oil.


Replace the exhaust filter

If the pump temperature rises significantly, the motor current reaches or exceeds the rated current, and oily smoke is generated at the exhaust port of the pump, check whether the exhaust filter is blocked. If it is blocked, it should be replaced in time. An exhaust pressure gauge can be installed at the pump oil hole to check whether the filter is blocked. When the pressure exceeds 0.6bar (gauge pressure), replace the exhaust filter.


Clean the suction filter

The suction filter should be kept clean to avoid a drop in the pumping speed.


Vacuum Pump Storage

If the pump is left unused for a long time, drain the oil and clean the pump, then inject the new oil and place it in a dry place.


If you want to learn more news and knowledge about rotary vane vacuum pumps, please read these blog posts.


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