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Welch 1402 Duo Seal Belt Drive Vacuum Pump 1/2hp running Pyrex Bell Jar, Valve and Vacuum/Pressure Gauges, Catalog & Instruction Manual, 2 gal.Please select an Owner's Manual below for further information: Duoseal Belt Drive Model 1402 Direct Drive Rotary Vane Pump PumpModel 8905. and Parts L1sts for the folfowmg Sargent-Welch DuoSeal Pvmps. 1 . Model 1 3 7 3 . Model 1402 . .. All Sargent-Welch mechanical vacuum pumps are. 1400, 1405, 1402, required to communicate with your dealer or with Welch Vacuum be sure to include your order numbers for . All DUOSEAL mechanical vacuum pumps are normally tested with DUOSEAL® oil and shipped with a full. communicate with your dealer or with Welch Vacuum be sure to include your order numbers All DUOSEAL pumps should be mounted in a horizontal plane. .. A*: Major Repair Kit Catalog # 1402K-06 B*: Minor Repair Kit Catalog # 1402K-. 1402. 24. 1405. 25. Oil Case for 1397/1374. 26. Oil Case for 1399. 27 communicate with your dealer or with Welch Vacuum be sure to include your order numbers for quick All DUOSEAL pumps should be mounted in a horizontal plane. OWNER'S MANUAL FOR. DUOSEAL® VACUUM PUMP MODELS: 1402B-01 & 3Z655. WARNING. Never block the Exhaust Port. If the exhaust port is blocked, DuoSeal Vacuum Pumps are known for their ruggedness world-wide. These rotary vane pumps have large oil reservoirs to dilute contaminants. Low pump rpm 11 Oct 2010 2 Sep 2012