5 hacks for oil-sealed vacuum pump maintenance June, 2025
Five service hacks that will save you time, money, and headaches
Welcome back to our service V-Log (video series). After our first episode on how to choose the right vacuum pump oil for you, we’re excited to bring you the next installment on vacuum pump maintenance.
Whether you're managing a lab, running a production line, or maintaining a research facility, these tips will help you:
- Maximize vacuum system performance
- Extend equipment lifespan
- Minimize downtime and maintenance costs
Watch the full episode in only 5 minutes or read on for the highlights.
Hack #1: Keep The Oil Clean And Fresh
One of the most common reasons your vacuum pump may not reach its ultimate vacuum is contaminated oil. If you notice crystallization, discoloration, or particles in the oil, it’s time to change it. Shut off the pump after it reaches operating temperature, drain the warm oil, and refill with fresh oil—don’t forget to replace the oil filter.
If the oil appears creamy due to water contamination, run the pump with the inlet closed and the gas ballast valve open for about an hour to restore oil quality. Clean oil is the lifeblood of your pump—check it daily or weekly depending on usage.
Inspect your oil regularly and check for:
- Color: when the oil turns dark or cloudy it is time for an oil change
- Odor: if the oil smells burnt, it needs urgent replacement
- Texture: a gritty or thick consistency indicates the oil is off
Do you need help in choosing the right oil? Tune into Episode 1 for an in-depth overview of vacuum pump oils.
Pro Tip: Use the gas ballast when in humid conditions or vapors. Just remember to close it once the system reaches base pressure.
Hack #2: Check Pipe And Exhaust Connections
Leaks in your vacuum system or piping can cause major issues and increase energy consumption. Regularly inspect hose and pipe connections to ensure they’re leak-tight. Also, make sure your oil-sealed pump is connected to an exhaust pipe to avoid contaminating the ambient air. A blocked exhaust can cause back pressure and reduce pump performance.
Pro Tip: Use a leak detection spray or ultrasonic leak detector for quick and accurate identification of leaks.
Hack #3: Keep Your Inlet Screen Clean
A clogged inlet screen restricts airflow, forcing your pump to work harder and wear out faster. To maintain peak performance, it's a good practice to regularly inspect, clean, or replace the inlet filter.
Pro Tip: install a high-capacity filter in dusty environments or add a pre-filter for extra protection.
Hack #4: Monitor Your Oil Level And Change Your Oil Filter
Always check that your pump has the correct oil level. Too little oil can cause damage, and too much can harm sealing components and even the process chamber.
If the oil is low or contaminated, shut off the pump, drain the oil, and refill with fresh oil. If oil levels keep dropping, check for leaks or consult a service partner.
And don’t forget to replace the oil filter if it’s dirty—fresh oil and a clean filter keep your pump running at its best.
Pro tip: Use an oil condition monitoring system for real-time diagnostics and avoid surprises.
Hack #5: Inspect And Clean The Inlet Valve
Contamination can cause the inlet anti-suck-back valve plate to stick. Disassemble and clean the valve thoroughly to maintain stable performance and minimize process contamination. If contamination is heavy, consider using an inlet filter.
Pro Tip: Use a soft brush and vacuum-compatible solvent to clean valve components without damaging seals or surfaces.
Checklist For Oil-Sealed Vacuum Pump Service
These five simple hacks can make a huge difference in your vacuum system’s reliability and efficiency. By implementing them, you’ll enjoy:
- Longer pump life
- Lower operating costs
- Fewer breakdowns
- Improved process reliability
Watch The Complete Video Including All 5 Hacks
