Single Stage Oil Filled Pumps

Selecting an oil-filled rotary vane pump

For a single-stage oil-lubricated pump, compare the pressure required during normal operation rather than choosing on free-air capacity alone. Include vapour exposure, hours of operation and existing inlet or exhaust filtration in your enquiry. Oil specification and service access should form part of the comparison.

Frequently asked questions

When should I compare single-stage and two-stage pumps?

Compare them when the required operating pressure or connected equipment makes the choice uncertain. Two-stage designs generally achieve lower ultimate pressure, while the correct selection still depends on flow and duty. Check the actual model data rather than relying only on the stage count.

Does an oil-filled vacuum pump need an exhaust filter?

Check the pump’s supplied equipment and installation instructions. An exhaust oil mist filter and an inlet protection filter perform different jobs. Send the model and existing filter reference if you need to identify an element or replacement assembly.

How often should vacuum pump oil be changed?

Use the manufacturer’s maintenance schedule and account for the actual process. Vapours, contamination and operating conditions can affect service needs. There is no single oil-change interval that suits every pump and application.

Can I use a different make of vacuum pump oil?

Only after checking the required specification and compatibility. Send the pump model and existing oil reference. A similar viscosity or a product labelled vacuum pump oil is not sufficient evidence that it is a suitable replacement.

Related equipment and guidance

Two-stage rotary vane pumps · Filters and separators · Vacuum pump oils

Practical selection guide

Use our SIRELLA and EVISA selection guide to check the operating duty and the exact model variant. Dry claw or oil-lubricated rotary vane?.