EM -Small Rotary Vane

Edwards' small and medium EM range of oil-sealed rotary pumps is re-known for their high ultimate vacuum, rapid pumping speed, quiet operation and ability to handle vapour.

They have become the industry standard for laboratory and light industrialapplications.

Pumping Speeds
0.7, 1.5, 18, 28 m3/h

Final Pressure
Up to 3x10-3 mbar

Special Versions
Atex, Fomblin, PFPE

Silent
With only 43 dB(A) and very low vibration levels, it is the ideal laboratory primary pump.

3x10-3mbar

Performance
Excellent vacuum levels, even with Gas Ballast, for clean and wet chemistry applications.

Compact
Unrivalles pumping speeds in the most compact package

All Conditions
Positive pressure oil lubrication system for effective cooling and lubrication under all conditions.

Gas Ballast
With up to 700 g/h of vapour pumping capability and flexibility for your process.

Simple Maintenance
Preventive service can be carried out using simple workshop tools.

EM oil sealed rotary vane sizes

Peak pumping speed

Ultimate vacuum (total pressure)

Ultimate vacuum with gas ballast

Water vapour handling capacity

Noise at ultimate

m³/h

mbar

mbar

g/h

dBA

E2M0.7

0.75

0.003

0.2

8

43

E2M1.5

1.6

0.003

0.025

16

54

E1M18

17

0.03

0.65

650

57

E2M18

17

0.001

0.015

300

57

E2M28

27.5

0.001

0.015

700

57

Features & Benefits

E2M0.7 & E2M1.5

Edwards' small EMs are extremely compact pumps with small dimensions and weight, as well as extremely low noise levels with only 42 dBA on the E2M0.7.

They are very popular amongst OEMs and end-users and have benefited from continuous product development pumps. Engineered with a positive-pressure oil lubrication system, they have effective lubrication and cooling under all conditions.

An alternative horizontal inlet port is available where vertical space is restricted.

E1M18, E2M18 & E2M28

Edwards' medium EM pumps are very popular amongst OEMs and end-users and have benefited from continuous product development pumps. Engineered with a positive-pressure oil lubrication system, they have effective lubrication and cooling under all conditions.

Continuous product development has kept these pumps updated and popular amongst customers.

E2M28 - small "industrial" pump

The E2M28 was designed as a small "industrial" pump rather than a large "scientific" pump.

It is fitted with a roller bearing on the shaft, while all competitor pumps use sleeve bearings which are less reliable under difficult operating conditions. It also uses a hardened sleeve to minimise wear and maximise life.

Condensable Vapours

Vapours condensing in pump oil leads to poor lubrication, increased wear of moving parts and loss of vacuum performance.

The EM is designed to run hot and has a two open position gas ballast valve to allow the highest gas ballast flowrates of any similar sized pump. The EM pump has great flexibility to operate on applications as a high-vacuum mode or as a high-throughput mode.

All two-stage pumps have to "compromise" the oil lubrication system to achieve good ultimate vacuum, but if the pump is operated at high inlet pressure or with high vapour loads, the high vacuum stage will suffer from oil starvation and high rates of condensation of vapours in the oil. Edwards unique "Mode Selector Switch", in combination with gas ballast position GB2, allows the pump to handle the highest vapour loads of any pump in its class without any wear or loss of lubrication.

Dimensions

Performance Curve

1. without gas ballast            2. with gas ballast

EM Vacuum Accessories

Edwards provides a full range of highly-quality accessories specifically designed for the unique EM pump. The right accessories, used in the right way, can maximise the reliability and intervals between oil changes and services, and are designed to keep the performance of the EM pump at a maximum.

Request a Quotation!

Pump

E1/E2M Pump

Accessories

Nozzle Hose Adaptor

Centering Ring

Clamping Ring

Exhaust Mist Filter

Oil Return Kit

Foreline Trap

APG100 Pirani

ADC Pressure Display Controller

Spares

Ultragrade Oil 15 (E2M0,7 / 1,5)

Ultragrade Oil 19 (E1/2M18 y E2M28)

Oil Mist Element EMF

Oil Odour Element EMF

Alumina

Documentation & Media


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