Welch 1402N ChemStar Explosion Proof Rotary Vane Two-Stage Vacuum Pump.
Explosion Proof Motor, ½ HP, 1-Ph, 115VAC 60Hz. PN 1402N-90

The Welch 1402N CHEMSTAR belt drive dual stage rotary vane vacuum pump with Explosion Proof Motor is a durable vacuum pump with a superior vapor handling capability. The ChemStar pumps are the chemical resistant series and offers an excellent ultimate pressure of 1x10^-4 Torr. They have a pumping speed displacement of 5.6 CFM, operates on 115 VAC., pump 525 RMP, oil capacity 2.25 qt., and the pump includes a gas ballast. These pumps are complete with 1-phase explosion proof motor 1/2 horsepower, includes KF-25 flange to 1-20 thread adapters for both intake and exhaust, weighs 133 lbs., and has dimensions LxWxH, 20x14x15.5 in.

This unique Welch 1402N 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.

OILS
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. All accessories and oils for this pump can be found on this website.

NOTE: Two-stage pumps should not be operated continuously at pressures above 10 Torr. 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. Many customers who order Welch Vacuum Pumps with XPRF motors appreciate being informed of the above information. From there they can consult with their EH&S department and decide if XPRF is indeed appropriate, or if choosing an alternative Welch-llmvac Vacuum Pump makes more sense for expense and/or delivery lead time reasons. Welch-llmvac cannot recommend for or against use of XPRF motored Vacuum Pumps. That decision must remain the responsibility of each customer.

NOTE: INCLUDES THE EXHAUST COLLECTOR BUT NOT THE HARDWARE