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Rotary Vane Vacuum Pump

– Welch

The CRVpro Rotary Vane Vacuum Pump by Welch is an economical starting point for labs looking to reach a deep vacuum level while maintaining varying displacement capacities.

These rotary vane vacuum pumps use DuoSeal Pump Oil to make an air-tight seal, which allows the oil to cool the moving parts. The CRVpro series is competitively priced, but keep in mind that these pumps will require regular maintenance to keep the vacuum pump in proper working order.


  • Large capacity, 10°C cooler
  • Chemical resistant
  • Deep vacuum
  • Oil-cooled

Larger capacity, 10° cooler.

These pumps run about 10°C cooler and have a 40% larger oil capacity than comparable pumps from competitors. The cooler operating temperature means less corrosion for the user. Enhanced reliability and less frequent maintenance are all exciting benefits of the Welch CRVpro, and this is why we are happy to recommend it to our customers.

Chemical resistant.

The internals of the CRVpro are also coated with a chemical-resistant compound which protects non-moving parts. This is another important, cost-saving benefit for you down the road.

Suited to a variety of tasks.

Some of the applications for which this pump is recommended are: degassing, vacuum ovens (such as those from Cascade, Across International, and others), concentrators and freeze drying.*

In addition, rotary vane vacuum pumps work well for: solvent removal, high boiling point compoundsvacuum ovens and aqueous vapors.

We wholeheartedly recommend these pumps for our 2L, 5L and 12L short path kits, but be sure to select the correct model for each system.

A smart rotary vane vacuum pump choice.

The vapors created inside the system (depending on the sample) can damage the pump, unless you use a cold trap or vacuum trap to eliminate as much damage-causing vapor as possible from entering your system.

You may also want to have a filter for the pump, to prevent any oil or gasses from leaking out into your lab.

Selecting a rotary vane vacuum pump can be a difficult job. That’s why we’re here to help you through the process. If you have any questions about the right pump selection for a particular purpose, please do not hesitate to give us a call.

*Note: These pumps are not recommended for applications that need a sustained operation above 30 Torr.

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