Description All high vacuum pumps rebuilt and sold through AVAC have been completely disassembled, cleaned, re-machined and carefully inspected for wear by our factory trained technicians. Units are assembled with new vanes, shaft seals, exhaust valves, gaskets, springs, oil distribution valves and bearings prior to undergoing an extended performance test to meet or exceed OEM specifications. All pumps are then painted, detailed, and pass a final quality assurance inspection prior to shipping. A final test certificate is provided with each pump, which will be covered with a one-year warranty. Welch Vacuum Pumps Rugged oil seal pumps for a wide variety of vacuum needs, including Schlenk drying lines, freeze drying, degassing, concentrations, distillations, and more. Pull drive enables low rpm operation by reducing friction, oil temperature, and oil degradation. Its large oil reservoir minimizes contamination effects and extends maintenance intervals. Starting in 1880, Welch has provided quality vacuum pumps for laboratory, industrial and educational applications. It has now been over a century and today, Welch is a leading manufacturer of vacuum pump products for chemical and biological laboratories, high vacuum manufacturing, and air conditioning/refrigeration. One thing that hasn't changed over the past 100 years is the Welch reputation for building pumps of exceptional performance and durability. Welch 1397 Vacuum Pump 17.7 cfm REBUILT w/ 1 Year Warranty 1397B01 1397B-01 Specifications Welch Model1397Free Air DisplacementCFM17.7L/min500Ult. Pressure, Torr(mbar)1. Ult. Pressure, microns Hg1 x 10–4(0.00013) 0.1Gas BallastYesPump RPM400Motor Horsepower (watts)1(750)Oil Capacity, qt. (liters)1.25(1.2)Tubing Needed, I.D. in1-5/8(41)Intake, Nipple Thread1.75-20Exhaust, Thread Type1.75-20Weight, lbs. (kg)205(93)Overall DimensionsL in. (cm)26(66)W in. (cm)13.7(34.8)H in. (cm)18.8(47.6)Ship Weight, lbs (kg)213(96.8)Shipping Carton Dimensions27.3 x 18 x 22L x W x H in. (cm)(69.3 x 45.7 x 55.9)
