Welch has been supplying vacuum pumps to fill laboratory, HVAC, industrial and OEM application needs for over 100 years. These years of experience have allowed Welch to develop an in-depth knowledge of vacuum applications and selecting the correct vacuum pump solution for the application.Welch’s innovative engineering provides industry-leading designs for oil-sealed rotary vane pumps (Duoseal belt-drive & CRVpro direct-drive), chemical duty diaphragm pumps, self-cleaning dry vacuum systems, CHEMSTAR DRY oil-free mini-roots blower vacuum systems, and oil-free WOB-L® vacuum pumps.

Welch pumps are known world-wide for their ruggedness and durability.  Many of our pumps are still in service decades after purchase.

Product Lines

• Vacuum pumps - Rotary vane, oil-sealed
• Vacuum pumps - Diaphragm vacuum pumps
• Vacuum pumps - WOB-L piston vacuum pumps
• Vacuum pumps - CHEMSTAR DRY mini-roots blower systems
• Vacuum pumps - BLDC roots blowers
• Vacuum pumps - Diffusion pumps
• Vacuum Network Systems – Replacement for central or house vacuum systems
• Vacuum tubing & Metal Hose
• Vacuum traps
• Vacuum pump oils
• Vacuum gauges &  Controlers
• Aspiration systems

Products, Services and Markets

Welch vacuum pumps are found everywhere that mechanical vacuum pumps are used today. Some markets and industries that use Welch pumps are laboratory/research, commercial and industrial HVAC, electronics production,  aerospace, and high energy physics.

Welch vacuum pumps are especially popular in chemical and life science research laboratories. They are widely used in laboratory bench work and in OEM applications. The Welch CRVpro direct drive and DUOSEAL belt-drive high vacuum pumps combine performance, user convenience, and ruggedness. They are designed for global use in analytical instruments as well as freeze dryers, vacuum concentrators and other lab appliances. Welch OIL-FREE PUMPS (diaphragm, mini-roots blower systems, WOB-L piston) offer models for OEM applications as well as for gel drying, rotary evaporation, filtration and other sample modification techniques. Other Welch vacuum pumps provide a complete range of high vacuum solutions.

Company Key Products

CRVpro direct-drive, mechanical vacuum pumps

CHEMSTAR^® high vacuum pumps for corrosive gases

DUOSEAL^® rugged belt-drive, mechanical vacuum pumps

Self-Cleaning Dry Vacuum System™

WOB-L^® Piston Dry Vacuum Pumps

DRYFAST^® (oil-free) & DRYFAST ULTRA^® pumps with PTFE construction for chemical resistance

House Vacuum Systems

Accessories – refrigerated cold traps, traps, gauges, tubing, hardware

Pump Oils