Product Description

Edwards E2M28 Vacuum Pump

23 CFM

115/200-230 V, 1-ph, 50/60 Hz with IEC60320 connector fitted

Here we have the 1 phase version of the very popular Edwards E2M28 vacuum pump. Previously, these were known as the E2M30 model of pump. Internally they are the same pump. These pumps are available in other voltages if you need it. Just contact us and we can help you out. PFPE versions of the E2M28 are also available.

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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
Power Connector 1-ph**	IEC EN60320 C19
Weight	44 kg / 97 lbs
Noise	57 dB(A) @ 50 Hz
Oil capacity - max	1.5 litre
Oil capacity - min	1.2 litre
Recommended oil (supplied)	Ultragrade 19

* The PFPE are supplied with NW25 outlet connection
** Pumps listed with IEC connector only

1 year mfg warranty.

E2M28 Overview

The EM range of oil-sealed rotary pumps - renowned for its high ultimate vacuum, rapid pumping speed, quiet operation and ability to handle vapour - has become the industry standard laboratory and light industrialapplications.
The E2M28 pump is a two-stage, direct drive, sliding vane pump. The pump is oil sealed and designed for reliable, long-term operation in both laboratory and industrial environments. 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.

E2M28 Technology

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.

Applications for Edwards E2M28

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

**Photos are for reference only. Actual product may have slight differences.

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Edwards E2M28 1PH Vacuum Pump-New