Gardner Denver Welch Vacuum Technology, Inc, formerly Welch Rietschle Thomas, is a wholly-owned subsidiary of Gardner Denver, a leading global manufacturer of compressors, vacuum pumps, and related products. This change became effective July, 2005. Within Gardner Denver, Welch is an SBU of the Thomas Products Division.

Welch has provided quality vacuum pumps for laboratory, industrial and educational applications for over a century. Today, Welch is a leading manufacturer of vacuum pump products for chemical and biological laboratories, high vacuum manufacturing, and air conditioning/refrigeration. Headquartered in Niles, Illinois, the Welch product line includes oil lubricated rotary vane vacuum pumps; dry piston and diaphragm vacuum pumps; and specialized vacuum systems, components, and applications. One thing that hasn't changed over the past 100 years is the Welch reputation for building pumps of exceptional performance and durability.

Brochures:

Laboratory Vacuum Catalogue [3,18 MB]

Liquid Laboratory Catalogue [3,28 MB]

OEM, Refrigeration & Industrial Catalogue [839,0 KB]