The E1M18 pumps are direct drive, sliding vane pumps. The pump is oil sealed and designed for reliable, long-term operation. The pump is a freestanding unit with the drive provided through a flexible coupling by either a single-phase or three-phase (four-pole) motor.

Features and Benefits

  • The pump is designed for reliable, long-term operation.
  • Thermal overload device prevents overheating (single phase only).
  • The drive is provided through a flexible coupling by a single-phase or three-phase (four pole) motor.
  • The motors are totally enclosed and are cooled by the motor-cooling fan.
  • Pressure die cast oil box with integral oil seals prevents oil leaks.
  • Gas ballast valve for large water vapour handling capacity.
  • Externally approved to EN61010, CSA, C22.2 and UL61010.
  • Large O-ring sealed oil sight glass allows oil condition and level to be easily inspected.


  • Analytical instruments
  • Leak detectors, Helium
  • Research and development
  • Backing Turbomolecular pumps
Technical data  
Displacement (50Hz) 20.5 m3h-1 /12.1 ft3min-1
Displacement (60Hz) 25.0 m3h-1 /14.7 ft3min-1
Speed (Pneurop 6602)  
50Hz 17.0 m3h-1 /10 ft3min-1
60Hz 20.4 m3h-1 /12.1 ft3min-1
Ultimate vacuum (total pressure)  
without gas purge 3 x 10-2 mbar /2.2 x 10-2 Torr
with gas purge 6.5 x 10-1 mbar /4.8 x 10-1 Torr
with Fomblin® 3 x 10-1 mbar /2.56 x 10-2 Torr
Inlet connection NW25
Outlet connection Nozzle 15 mm external Ø removable from 3/4 in BSP tapped hole
Max permitted pressure at outlet 0.5 bar gauge /7 psig
Max inlet pressure for water vapour 50 mbar /38 Torr
Max water vapour pumping rate 0.65 kg h-1
Operating temp range 13-40°C
Nominal Rotation speed 50/60Hz 1440/1720 rpm
Power connector 1-ph* IEC EN60320 C19
Motor power 50 Hz 0.55 kW
Motor power 60 Hz 0.75 kW
Weight 37 kg / 82 lbs
Noise @ 50Hz 57 dB(A)
Oil capacity - max 1.4 litre
Oil capacity - min 0.9 litre
Recommended oil (supplied) Ultragrade 19

*  Pumps listed with IEC connector only