Edwards Vacuum A34318989 E1M18 ATEX One Stage Rotary Vane Pump, 230V, 1ph, 50Hz Ex II 2G IIC T4

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Our popular RV, E1M18 and E2M18 are available with ATEX approved motors which have an external ATEX classification of either IIB or IIC whilst maintaining an internal classification of Ex II 3G c IIB T4.

Technical Data

Displacement (swept volume) 
50 Hz1.8 m3h-1 / 1 ft3min-1
60 Hz2.2 m3h-1 / 1.3 ft3min-1
Speed (Pneurop 6602) 
50 Hz1.6 m3h-1 / 0.8 ft3min-1
60 Hz2.0 m3h-1 / 1.2 ft3min-1
Ultimate vacuum (total pressure) 
without gas ballast3 x 10-3 mbar / 2.3 x 10-3 Torr
with gas ballast2.5 x 10-2 mbar / 1.9 x 10-2 Torr
Inlet connectionNW10 flange
Outlet connection**Nozzle 11 mm external diameter removable from 3/8 inch BSP tapped hole
Maximum permitted pressure at outlet0.5 bar gauge / 7 psig
Maximum inlet pressure for water vapour15 mbar / 11 Torr
Maximum water vapour pumping rate16 gh-1
Motor power 50/60 Hz (IP54)0.16 kW
Nominal rotation speed 50/60Hz2800/3400 rpm
Power connectorIEC EN60320 C13
Operating temperature range12 - 40 °C
Weight10 kg / 22 lbs
Noise54 dB (A) @ 50 Hz
Noise with acoustic enclosure47 dB(A) @ 50Hz
Oil capacity - max0.28 litre
min0.2 litre
Recommended oil (supplied)Ultragrade 15

** The FX are supplied with NW25 outlet connection

  • £6212.00
ATEX EM18 pumps have an external ATEX classification of Ex II 2G IIC T4 or Ex II 2G IIB T4 and are suitable for use in potentially explosive atmospheres. They share the same internal ATEX classification as our standard EM18 pumps, namely Ex II 3G c IIB T4. ATEX pumps with flameproof motors require the user to provide 2 off hazardous area cable glands and cables. In addition, connection of the thermistors to an appropriate safety circuit must be made to switch off the pump if overheating occurs. The pumps are supplied with the gas ballast port plugged. When pumping flammable gasses or vapours you must fit and inert gas purge to this port to dilute such gasses or vapours below the lower explosive limit. Supplied with ultragrade 19 oil, NW25 O-ring and centering ring.

Features and Benefits

  • Approved to external ATEX standards Ex II 2G IIC T4 and Ex II 2G IIB T4, which enables use in hazardous environments.


The motor is totally enclosed and is cooled by the motor-cooling fan which directs air along the motor fins. The motors are fitted with a thermal overload device. When the motor is too hot, the thermal overload device switches off the pump. The thermal overload device has an automatic reset; when the motor cools down, the device resets and the motor will restart.
An oil pressure system lubricates the pump shaft bearing surfaces and rotor sealing faces. The pump has an oil distribution valve which prevents discharge of oil to the pump interior (suckback) after the pump stops. The pumping chambers are air-tight, so this arrangement prevents oil suckback unless the gas ballast valve is open.
You can inspect the level and condition of oil in the oil box reservoir through the oil sight-glass. An oil filler-plug is fitted to the top of the oil box. The pump has two oil drain-plugs to allow either gravity oil drain or pressure oil drain.


  • Hazardous area pumping
    • SKU
    • Commodity Codes
  • ATEX Rated
  • Oil Sealed
  • Vacuum Peak Pumping Speed m3 h-1 @ 50Hz
  • Vacuum Peak Pumping Speed cfm @ 60Hz
  • Ultimate pressure w/o gas ballast - 50mBar
  • Ultimate pressure w/o gas ballast 60Torr
  • Manufacturer
    Edwards Vacuum
  • Country of Origin
    Czech Republic