Vacuum Oil and Accessories for Vacuum Pumps

Explore our Portfolio of Vacuum Oil and Accessories for Rotary Vane and Vacuum Pumps



Welch has provided oil-sealed, rotary vane pumps to fulfill customer needs in laboratory and industrial applications for over 65 years. Available as direct and belt-driven versions, Welch’s rotary vane pumps and systems are well known for their high-water vapor tolerance, which leads to an outstanding reliability for chemical applications. 

Our comprehensive range of vacuum oil and accessories includes: 

  • Post Pump Production 

  • Vacuum Traps 

  • Vacuum Controllers and Gadgets 

  • Service Kits 

  • DuoSeal Pump Oil 

  • Premium Pump Oil 

  • Gold Oil 

These products are offered in a variety of sizes, filters and configurations. 

Welch's direct-driven rotary vane pump is lubricated automatically at an optimized oil pressure, resulting in lower ultimate pressures and stabilized temperature, thereby extending its lifespan. Made with selected materials that offer good chemical resistance, it is a suitable portable partner for a wide range of applications in laboratories and industrial environments. 

Welch’s two-stage rotary vane pumps are always an option when an ultimate pressure level from 0.5 mbar to 1x10-4 mbar is required. Depending on the pump model the pumping speed range lies between 1.8 m³/h and 60 m³/h. 


Keep your rotary vane pump in shape

From our experts: Read about 10 tips that will ensure that your rotary vane pump works seamlessly. 


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Rotary Vane Pumps Overview

Rotary Vane Pumps are positive displacement pumps which create vacuum through rotation of one or more vanes inside the pump chamber. They are also referred to simply as rotary vacuum pumps, or alternatively, vane vacuum pumps.

The new CRVpro family of direct drive lab vacuum pumps is more reliable and has longer service intervals than comparable direct drive rotary vane vacuum pumps, and they use up to 36% less oil. Three features contribute to these benefits: they run 10°C cooler than comparable pumps (slowing corrosion), have a 40% larger oil capacity (diluting aggressive chemicals), and have a chemical resistant coating in the oil case and rotary.

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

It is designed for applications such as vacuum ovens, industrial applications, vacuum manifolds (Schlenk Lines), freeze dryers (Lyophilisation), glove boxes, vacuum concentrators, HVAC or as a backing pump for high vacuum systems such as mass spec devices.

Why Choose Welch?

Welch is a recognized provider of Vacuum Pumps, Systems and Fittings for Industrial and Laboratory Applications. We continually deliver products meeting the strictest requirements for mission-critical applications, and provide a comprehensive offering of products and great engineering capabilities to fit our customers’ needs.

As a reliable and trusted partner, we stand up to the challenge of supplying best-in-class products and solutions on time to manufacturers of equipment in the life sciences, healthcare, and industrial segments.

High Quality Standards

At Welch, we are committed to delivering the highest quality products and services in the industry, and this ethos is woven through every part of our design and manufacturing processes. We are ISO 13485: 2016 certified for the design and manufacture of medical devices, which confirms that we follow stringent requirements for planning, management, resourcing, production, and quality control procedures.