Edwards E2M28 Vacuum Pump

Edwards E2M28 Two Stage Rotary Vane Pump

Model A373-15-903

With Oil Mist filter EMF20

The EM range of oil-sealed rotary pumps – renowned for their high ultimate vacuum, rapid pumping speed, quiet operation and ability to handle vapour – have become the industry standard for laboratory and light industrial applications. The pump is a freestanding unit with the drive provided through a flexible coupling by a single-phase motor.

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.

Technical Data

Displacement (swept volume)
50 Hz 32.2 m3h-1 / 19 ft3min-1
60 Hz 38.9 m3h-1 / 22.3 ft3min-1

Speed (Pneurop 6602)
50 Hz 27.5 m3h-1 / 16.2 ft3min-1
60Hz 33.0 m3h-1 / 19.5 ft3min-1

Ultimate vacuum (total pressure)
without gas ballast 1 x 10-3 mbar / 7.5 x 10-4 Torr
with gas ballast 1.5 x 10-2 mbar / 1.1 x 10-2 Torr
with Fomblin® 1 x 10-2 mbar / 7.5 x 10-3 Torr

Inlet connection NW25 flange
Outlet connection** Nozzle 15 mm external Ø removable from 3/4 in BSP tapped hole
Max allowed pressure at outlet 0.5 bar gauge / 7 psig
Max inlet pressure for water vapour 30 mbar / 23 Torr
Max water vapour pumping rate 0.7 kg h-1
Operating temperature range 13 – 40 °C
Nominal rotation speed 1440 / 1720 rpm
Motor power 50 Hz 0.75 kW
Motor power 60 Hz 0.90 kW
Weight 44 kg / 97 lbs
Noise 57 dB(A) @ 50 Hz
Oil capacity - max 1.5 litre
Oil capacity - min 1.2 litre

Applications

Analytical instruments - LCMS
Automotive
Beam lines and high energy physics
Centrifuges, ultra-high speed
Coating
Cryogenics
Degassing/curing - oil, epoxy resin
Distillation/extraction/filtration
Freeze drying
Furnaces
Gas bottle filling/emptying
Gel drying
Glove boxes, ovens
Laboratory bench top vacuum
Lasers, gas recovery and re-circulation
Leak detectors, Helium
Load locks and transfer chambers
Refrigeration manufacture
Rotary, centrifugal evaporators
Solvent recovery
Surface science instruments
Turbomolecular backing pumps

Serial# 027228968

Dims 60cm (D) x 18cm (W) x 28cm (H)

PDF Manual