These Welch 1402 DUOSEAL explosion proof, mechanical vacuum pumps offers an excellent ultimate pressure of 1x10^-4 Torr. They 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.

These Welch 1402 DuoSeal vacuum pumps are equipped with a 1-phase explosion proof motor which operates on 115V 60Hz. Each pumps come with a gas ballast; free air displacement of 5.6 CFM, ultimate pressure of 1x10^-4 Torr, oil capacity of 2.25 qts, requires intake tubing of 13/16 inch, and weights 55 lbs. Please refer to the recommendations made in the DuoSeal explosion proof owner's manual, which is available for download below. We recommend Welch DuoSeal oil for this pump. All accessories and oils for this pump can be found on this website.

NOTE: These explosion proof pumps are designed for environments where risk of building up concentrations of explosive/flammable vapors is high. Typically not required by EH&S for processing standard laboratory solvent vapors. XPRF Motors power cords do NOT have plugs on them, because to meet XPRF system requirements, all components must be XPRF, be sparkless, and power conduits must be wired to hermetically sealed electric junction boxes by a qualified electrician. If any component in the system, vacuum oven, freeze dryer, etc is NOT XPRF then you do not have an XPRF system. It is recommended that you consult with their EH&S department and decide if XPRF is indeed appropriate, or if choosing an alternative Welch vacuum pump makes more sense. Ideal Vacuum Products cannot recommend for or against use of XPRF motored vacuum pumps. That decision must remain the responsibility of each customer.