The Welch 1376N Chemstar Belt Drive Rotary Vane is a durable vacuum pump with a superior vapor handling capability, primarily for pumping corrosive gasses. The Welch 1376N Chemstar Belt Drive dual stage rotary vane mechanical vacuum pump offers an excellent ultimate pressure of 1x10-4 Torr. These pumps are commonly used for vacuum furnace evacuation, backing turbomolecular pumps, backing diffusion pumps, rotary evaporation, refrigeration system evacuation, epoxy degassing, vacuum sterilization, backing mass spectrometers, freeze drying, vacuum centrifugal applications, vacuum distillation, space research, and other corrosive chemical vacuum processes.

This unique Welch 1376N CHEMSTAR vacuum pump was designed to give you the maximum possible service life when evacuating corrosive gases. However, corrosive gases can cause damage to the most rugged vacuum pump in an improperly configured or improperly operated vacuum system. Please refer to the recommendations made in the CHEMSTAR Owner's Manual (can be downloaded below under AVAILABLE DOWNLOADS) for operating your CHEMSTAR vacuum pump successfully when pumping corrosive gases. We recommend Welch DIRECTORR Gold Oil for this pump and if the flow of strong acids or halogens exceeds 10% of gas flow, you must switch to a perfluoropolyethers (PFPE) such as Fomblin Y06/6, Fomblin is a registered trademark of Ausimont. In addition, if ozone is pumped and its concentration exceeds 100 ppm of the gas flow, a perfluoropolyether (PFPE) oil must be used. Perfluoropolyethers are very resistant to chemical attack by strong acids. These Welch 1376N CHEMSTAR Belt Drive Pumps have a pumping speed displacement of 10.6 CFM. We repair this model and All Welch Vacuum Pumps. All accessories and oils for this pump can be found on this website.