About Gardner Denver Thomas, Inc.
Welch is a manufacturer of high performance vacuum pumps used in research laboratories, production and OEM applications such as aspiration, filtration, drying, degassing and distillation. Our oil-free (dry) technology includes diaphragm, piston, and CHEMSTAR DRY vacuum pumps. Our new CRVpro high vacuum rotary vane pumps come with enhanced features for use in chemical laboratory. Welch pumps are well-known for their durability and ruggedness.