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Welch Vacuum Pump 1398 53.1 cfm REBUILT w/ 1 Year Warranty


SKU: 40.44020.02

Please Contact us for Shipping Rates

Additional information

Weight 740 lbs
New / Rebuilt

Level of Vacuum

CFM / L/M (Displacement)

Inlet / Exhaust


Power Options



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

Gardner Denver Welch Vacuum Technology, Inc, formerly Welch Rietschle Thomas, is a wholly-owned subsidiary of Gardner Denver, a leading global manufacturer of compressors, vacuum pumps, and related products. Within Gardner Denver, Welch is an SBU of the Thomas Products Division.

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. With headquarters in Niles, Illinois, the Welch product line includes oil lubricated rotary vane vacuum pumps; dry piston and diaphragm vacuum pumps; and specialized vacuum systems, components, and applications. One thing that hasn't changed over the past 100 years is the Welch reputation for building pumps of exceptional performance and durability.

Welch Vacuum Pump 1398 53.1 cfm Specifications


Free-Air Displacement L/M
Guaranteed Partial Pressure
Blankoff, millitorr 
Pump Rotational Speed, RPM   245
Number of Stages  2
Oil Capacity, qts 2 1/2
Standard Belt Guard (not shown)  No. 41-2930
Net Weight. Pump Only, lbs   386
Net Weight, Mounted Pump, lbs  601
Shipping Weight, Mounted Pump, lbs   670
Intake Flange  6-1/8 O.D. x 3 1/4 I.D.
Bolt Circle  5 1/4 Dia.
6 Holes, 60° Apart   7/16 Dia.
0-Ring Groove   4-7/64 O.D. x 5/32 Deep x 1/4 Wide


Click Below for Specification Sheet

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