Edwards E2M275 series two stage oil sealed rotary vane vacuum pumps are renowned for their high ultimate vacuum, rapid pumping speeds, quiet operation and ability to handle water vapour. These direct drive rotary vane pumps are inherently compact and vibration free, and with their finger-proof fan and coupling housings they offer excellent operator protection.

Features and Benefits

  • Advanced pressurised oil circuit to give effective lubrication even under high gas loads
  • When the pump is switched off, the spring loaded distributor valve provides oil and air suck-back protection
  • Gas Ballast control to assist in handling high water vapour loads
  • Industrial roller bearings on drive shaft for ultimate reliability and long, trouble free life
  • Full height oil sight glass for easy checking of oil level and condition
  • Easy change oil filter, with oil filter condition gauge on larger models
  • Central inlet port to allow easy mounting of mechanical booster pump if required
  • Easy to maintain, with convenient service kits and international customer support.
  • A wide range of accessories to match your application needs
  • The pumps and accessories can be supplied either as individual components or as fully systemised, factory-tested combinations.


  • Vacuum metallurgy processes
  • Thin film coating technologies
  • Pharmaceutical freeze drying
  • Refrigeration and air conditioning system evacuation, drying, and backfilling
  • Transformer and cable drying and impregnation, insulating oil treatment plant
  • Lamp manufacture
  • Cryogenic vessel evacuation
  • Vacuum drying and distillation in chemical industries
  • Semiconductor device manufacture
  • Backing pump for high vacuum applications
Technical data  
  50Hz 292 m3h-1 / 172 ft3min-1
  60Hz 350 m3h-1 / 206 ft3min-1
Speed (Pneurop)  
  50Hz 255 m3h-1 / 150 ft3min-1
  60Hz 306 m3h-1  / 180 ft3min-1
Number of stages 2
Ultimate vacuum (total pressure)  
  Without gas ballast 1.0 x 10-3 mbar / 7.7 x 10-4 Torr
  With gas ballast 5.0 x 10-3 mbar / 3.8 x 10-3 Torr
Inlet connection ISO63 blank flange with seal
Outlet connection ISO40 flange centre tapped
Max outlet pressure 0.5 bar gauge
Max inlet pressure for water vapour 12 mbar / 9 Torr
Max water vapour pumping rate 2.3 kg h-1 / 5.1 lb h-1
Weight 253 kg / 558 lb
Motor protection rating IP55
Motor power  
  50Hz 7.5 kW / 10 hp
  60Hz 8.5 kW / 11 hp
Standard oil capacity  
  maximum 28 litre / 29.5 qt
  minimum 19 litre / 20 qt
Recommended oil Ultragrade 70
Noise level 75 dB (A)
Water cooling requirement 2 lmin-1