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Welch™ DuoSeal™ High-Vacuum Pumps

Rugged, durable pumps are ideal for demanding applications such as Schlenk drying lines, freeze drying, vacuum distillations, concentrating and degassing

Supplier:  Welch™ 1374B01

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Catalog No. 01-105-1

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Includes: V-belts, pulleys, belt-guard, oil supply, 3-wire cord (except 01-105-1 which must be conduit wired), plug, inline switch and instructions.



The ruggedness is a result of reduced frictional wear (less than 580rpm vs. typical 1750rpm direct-drive pumps) and high contamination tolerance (contaminants diluted due to large oil capacity).

  • Dual-voltage models come wired for lowest voltage listed in specifications chart; may be converted to higher voltage listed by rewiring
  • Wiring diagram supplied with each model
  • All models are single phase



1 x 10-4 torr
231 lb.
8.8 A
510 rpm
100 kg
60 Hz
47.6 cm
66 cm
High Vacuum Pump, Two-Stage
1 x 10-4 torr
1.5 hp
105 kg
V-belts, pulleys, belt guard, Oil supply, N. American 115V Plug
115/230 V 60 Hz
231 lb.
23 CFM
18.75 in.
26 in.
13.7 in.
Concentrating and Degassing, Freeze Drying, Schlenk Drying Lines, Schlenk drying lines, freeze drying, vacuum distillations, concentrating and degassing, Vacuum Distillations
115/230 V


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