Two-stage rotary vane vacuum pumps

Welch Rotary Vane Vacuum Pumps – precision and performance in perfect balance.

Using rotating vanes, these pumps create and maintain stable vacuum conditions – the very foundation of modern vacuum technology. This enables progress across research, industry, and manufacturing.

Welch offers a wide selection of models, from low- to high-capacity solutions, each engineered to meet specific vacuum requirements. The pumps deliver speeds from 2 to 64 CFM (3.4–108.7 m³/h) and achieve vacuum levels down to 0.0003 Torr.

The result is a combination of precision, reliability, and innovation that sets the standard for laboratories, production environments – and beyond.

The CRVpro family includes all the features you’d expect in a direct drive rotary vane pump: gas ballast, forced oil lubrication, anti-suckback mechanism and thermal overload protection.

CRVpro vacuum pumps can be used for applications such as:

freeze drying
vacuum ovens
schlenk line
backing turbo molecular pumps
degassing
vessel/chamber evacuation

Direct drive pumps are not recommended for filtration, aspiration, drying electrophoresis gels, or other applications requiring sustained operation above 30 torr.