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.
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
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.
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.
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.
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.
1. without gas ballast 2. with gas ballast
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.
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
