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Welch 1405 Vacuum Pump 1405B-01 3.2 cfm REBUILT w/ 1 Year Warranty


SKU: 40.44037.02

Welch 1405B-01 1405

Additional information

Weight 140 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.

The Welch 1405 is a tough vacuum pump that can handle a lot of vapor. The 1x10-3 Torr ultimate pressure of the Welch 1405 Mechanical Vacuum Pump is exceptional.

These pumps are usually 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, as well as other vacuum processes.

These Welch 1405 Pumps have a 3.2 CFM pumping speed and operate on 115 VAC.

  • High contamination tolerance
  • Low RPM for long service life
  • Adjustable Vac. / Gas Ballast

DuoSeal Vacuum Pumps are well-known for their toughness all over the world. To dilute contaminants, these pumps have large oil reservoirs. Low pump rpm lowers friction and wear while also lowering reservoir temperature, which lessens chemical reactivity.

 Welch Vacuum Pump

Gardner Denver Welch Vacuum Pump 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 welch 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 vacuum pump reputation for building pumps of exceptional performance and durability.

Welch 1405 Vacuum Pump 1405B-01 3.2 cfm REBUILT w/ 1 Year Warranty Specifications


Welch Model1405
Free Air Displacement 
Ult. Pressure, Torr(mbar)1.
Ult. Pressure, microns Hg
1 x 10–4(0.00013)
Gas BallastYes
Pump RPM525
Motor Horsepower (watts)1/2(370)
Oil Capacity, qt. (liters)2.25(2.1)
Tubing Needed, I.D. in7/16(11)
Intake, Nipple Thread1-20
Exhaust, Thread Type1-20
Weight, lbs. (kg) 112(51)
Overall Dimensions 
L in. (cm)20(51)
W in. (cm)12(30.5)
H in. (cm)15(38.1)
Ship Weight, lbs. (kg)132(60)
Shipping Carton Dimensions22.5 x 15.5 x 19.5
L x W x H in. (cm)(57.2 x 39.4 x 49.5)

Click Below for Specification Sheet

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