Vacuum Pump Maintenance Guide for Oil Purifiers

The vacuum pump is the core component of a vacuum oil purifier. Acting as the "heart" of the system, it creates a high-vacuum state inside the purifier tank. This lowers the boiling point of water in the oil, allowing moisture to evaporate quickly at low temperatures. Proper maintenance of the vacuum pump is crucial for ensuring stable operation, high filtration efficiency, and prolonging the equipment's lifespan.

Daily Maintenance Checklist (Before and After Operation)

Check Oil Level

When the machine is stopped, the oil level should remain between 1/2 and 2/3 of the sight glass.

Add oil if the level is low.

Listen for Abnormal Noise

The pump should operate with a steady sound.

If you notice harsh noises or strong vibrations, stop the machine immediately for inspection.

Correct Shutdown Sequence

Always close the vacuum valve first.

Then switch off the pump power to prevent oil backflow.

Regular Maintenance (Core Actions)

Vacuum Pump Oil Replacement (Most Important)

First oil change: After 100–200 hours of operation for new pumps.

Subsequent oil changes: Every 300–500 hours, depending on oil quality.

Tip: Drain old oil while still warm and refill with special vacuum pump oil to the proper level.

Filter Inspection

Intake Filter (Muffler): Check with every oil change. Clean with compressed air or ｒｅｐｌａｃｅ if necessary.

Exhaust Filter (Oil Mist Separator): Inspect after every 2–3 oil changes. ｒｅｐｌａｃｅ immediately if oil spray is observed at the exhaust.

Troubleshooting and Precautions

Common Issues

Low Pumping Speed / Failure to Pump: Check oil level, oil quality, and filter blockages.

Oil Spray from Exhaust: May indicate excessive oil level or a defective exhaust filter.

Critical Prohibitions

Never use regular lubricating oil, transformer oil, or other substitutes.

Always use dedicated vacuum pump oil to ensure reliability and prevent damage.

Summary: The Key Is Proper Oil Care

The foundation of vacuum pump maintenance lies in frequent oil checks, timely oil replacement, and the use of the correct pump oil. Following these steps prevents most failures and extends the service life of your vacuum oil purifier. For complex problems or major repairs, contact the manufacturer’s after-sales team for professional support.