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Welch™ CRVpro4 Direct Drive Rotary Vane Vacuum Pump

Offers increased reliability and longer service interval than direct drive rotary vane vacuum pumps

Manufacturer:  Welch™ 304101

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Catalog No. 01-184-151

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  • Runs 10°C cooler than comparable pumps
  • Slows corrosion
  • Has 40% larger oil capacity than comparable pumps
  • Dilutes aggressive chemicals
  • Has chemical resistant coating in oil case and pump module
  • Protects non-moving parts

Ultimate pressure

  • Without gas ballast partial: 5 x 10-4 mbar (4 x 10-4 Torr)
  • Without gas ballast total: 2 x 10--3 mbar (1.5 x 10-3 Torr)
  • With gas ballast total: 7 x 10-2 mbar (5 x 10-2 Torr)


1450rpm at 50Hz; 1740rpm at 60Hz
46.3 x 15.7 x 23.0cm (18.2 x 6.1 x 9.1 in.)
46.3 lb.
Vacuum Pump
67L/min. at 50Hz; 78L/min at 60Hz
cUL and CE
US - plug (NEMA - 5)
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