EMS Technical Data Sheets

Edwards E2M1.5 Vacuum Pump

EMS Catalog #91004, 91004-E

The E2M1.5 two-stage oil sealed rotary vane pumps are specifically designed to achieve ultimate vacuum and pumping speeds, with quiet operation and compact size. Providing long term reliability, these pumps have become the industry standard in range of scientific and laboratory applications, and the ideal partner for your tubomolecular pump.

The motor is completely enclosed and cooled by the motor-cooling fan, which directs the air along the motor fins. A thermal overload device is fitted to the motor which switches off the pump in the case that the motor gets too hot. This will automatically reset when the motor cools down and restarts the pump.

The E2M1.5 vacuum pump also has a pressurized oil system that 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, which 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 an oil drain-plug to allow either gravity oil drain or pressure oil drain.

This vacuum pump can be used in a variety of applications such as:

Technical Data

Displacement (Swept Volume)
  50Hz 1.8 m3h-1 / 1 ft3min-1
  60Hz 2.2 m3h-1 / 1.3 ft3min-1
Speed (Pneurop 6602)
  50Hz 1.6 m3h-1 / 0.8 ft3min-1
  60Hz 2.0 m3h-1 / 1.2 ft3min-1
Ultimate Vacuum (Total Pressure)
  Without Gas Ballast 3 x 10-3 mbar / 2.3 x 10-3 Torr
  With Gas Ballast 2.5 x 10-2 mbar / 1.9 x 10-2 Torr
Inlet Connection NW10 flange
Outlet Connection Nozzle 11 mm external diameter removable from ⅜ inch BSP tapped hole
Maximum Permitted Pressure at Outlet 0.5 bar gauge / 7 psig
Maximum Inlet Pressure for Water Vapor 15 mbar / 11 Torr
Maximum Water Vapor Pumping Rate 16 gh-1
Motor Power 50/60 Hz (IP54) 0.16 kW
Nominal Rotation Speed 50/60Hz 2800/3400 rpm
Power Connector IEC EN60320 C13
Operating Temperature Range 12-40°C
Weight 10 kg / 22 lbs
Noise 54 dB (A) @ 50 Hz
Noise with Acoustic Enclosure 47 dB(A) @ 50Hz
Oil Capacity – max 0.28 liter
Oil Capacity – min 0.2 liter
Recommended Oil (supplied) Ultragrade 15


1. Without gas ballast
2. With gas ballast


1. 220-240V motor
2. Handle (can be removed)
3. Alternative inlet position

Product Information

Edwards E2M1.5 Vacuum Pump