E1M18 200-230/380-415V, 3-ph, 50Hz or 200-230/460V, 3-ph, 60Hz

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 either a single‑phase or three‑phase (four pole) motor.

Each EM pump is supplied with 1 litre of Ultragrade 19 oil, O ring and centering ring, two Allen keys and spares seal for oil drain and filter plugs. For PFPE prepared FX pumps Fomblin® to be ordered separately.

This is a single stage oil sealed rotary vane pump which has a pressurised 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, 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 an oil drain-plug to allow either gravity oil drain or pressure oil drain.

• Analytical instruments
• Leak detectors, Helium
• Research and development
• Backing Turbomolecular pumps

The pump is designed for reliable, long‑term operation.
Thermal overload device prevents overheating (single phase only).
The drive is provided through a flexible coupling by a single‑phase or three‑phase (four pole) motor.
The motors are totally enclosed and are cooled by the motor cooling fan.
Full height O ring sealed oil sight glass for easy checking of oil level and condition.
Large sight glass and operating oil range.
IE3 energy efficient 3 phase motor used with E2M28.

Displacement (50Hz)	20.5 m3h-1 /
	12.1 ft3min-1
Displacement (60Hz)	25.0 m3h-1 /
	14.7 ft3min-1
Speed (Pneurop 6602)
50Hz	17.0 m3h-1 /
	10 ft3min-1
Speed (Pneurop 6602)
60Hz	20.4 m3h-1 /
	12.1 ft3min-1
Ultimate vacuum (total pressure)
without gas purge	3 x 10-2 mbar /
	2.2 x 10-2 Torr
with gas purge	6.5 x 10-1 mbar /
	4.8 x 10-1 Torr
with Fomblin®	3 x 10-1 mbar /
	2.56 x 10-2 Torr
Inlet connection	NW25
Outlet connection**	Nozzle 15 mm external Ø removable from 3/4 in BSP tapped hole
Max permitted pressure at outlet	0.5 bar gauge /
	7 psig
Max inlet pressure	50 mbar /
for water vapour	38 Torr
Max water vapour pumping rate	0.65 kg h-1
Operating temp range	13-40°C
Nominal Rotation speed 50/60Hz	1440/1720 rpm
Power connector 1-ph*	IEC EN60320 C19
Motor power 50 Hz	0.55 kW
Motor power 60 Hz	0.75 kW
Weight	37 kg / 82 lbs
Noise @ 50Hz	57 dB(A)
Oil capacity - max	1.4 litre
Oil capacity - min	0.9 litre
Recommended oil (supplied)	Ultragrade 19

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

1. Without gas ballast

2. With gas ballast

1. Without gas ballast

2. With gas ballast

Order No.	A	B	C	D	E	F	G
A34310940	-	474	247	83	159	171.4	217
A34315904	518	474	247	83	159	171.4	241
A34317984	-	504	247	83	159	171.4	251
A36310940	-	520	295	131	207	171.4	217
A36315904	564	520	295	131	207	171.4	241
A36317984	-	550	295	131	207	171.4	251