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Welch™ ChemStar™ Vacuum Pump

Designed for pumping corrosive gases

Supplier:  Welch™ 1402N90

Catalog No. 01-129-88

This item has been discontinued and is no longer available. Please reach out to your sales representative.



Corrosion resistant construction of vital parts resists chemical attack. 

  • High contamination tolerance with diluted contaminants and few moving parts
  • Reduced frictional wear (580rpm) for cool operation
  • Nitrogen purge to degas and cool oil
  • Fluoroelastomer seals and gaskets
  • Features metal vanes and stainless-steel valves
  • Polytetrafluoroethylene coated oil case
  • Features 115V 60Hz, 1ph explosion-proof motor
  • Free air displacement of 160L/min at 5.6cfm


  • Ultimate vacuum, 13.3MPa (1 × 10-4 torr)
  • Features gas ballast with 525rpm pump
  • 2.1L oil capacity
  • Tubing needed with 13/16 in. I.D.
  • ISO exhaust and intake flange is NW 25
  • Dimensions: 19.3L x 14.1W x 15.4 in. H (49 x 35.3 x 39.1cm)
Note: This is an explosion proof model that must be hardwired. It doesn't have a power cord or plug.


0.5 hp
51 kg
60 Hz
39.1 cm
49 cm
115 V
525 rpm
112 lb.
160 L/min.
15.4 in.
19.3 in.
14.1 in.


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