Edwards E2M175 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. 
The E2M175T4 pump has been certified for use in II 3 Gc IIB T4 Internal and II 2 G IIB T4 External classified areas. EM primary pumps (hydrocarbon oil only) may be supplied with ATEX classification either as part of a pump system or stand-alone.

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
  • 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 178 m3h-1 / 105 ft3min-1
60Hz 214 m3h-1 / 126 ft3min-1
Speed (Pneurop)  
50Hz 160 m3h-1 / 94 ft3min-1
60Hz 196 m3h-1 / 115 ft3min-1
Number of stages 2
Ultimate vacuum (total pressure)  
Without gas ballast 1 x 10-3 mbar / 7.7 x 10-4 Torr
With gas ballast 7 x 10-3 mbar / 5.4 x 10-3 Torr
Ultimate with Fomblin®  
Without gas ballast 1 x 10-2 mbar
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 vapor 20 mbar / 15 Torr
Max water vapor pumping rate 0.3 kg h-1 / 0.7 lb h-1
Weight 230 kg / 508 lb
Motor protection rating IP55
Motor power  
50Hz 5.5 kW / 7.5 hp
60Hz 6.5 kW / 8.5 hp
Standard oil capacity  
maximum 25 litre / 26 qt
minimum 16 litre / 17 qt
PFPE oil capacity  
maximum 18 litre / 19 qt
minimum 6.5 litre / 6.9 qt
Recommended oil Ultragrade 70
Noise level 75 dB (A)
Water cooling requirement 1.3 lmin-1