Liquid ring vacuum pumps in compact design LEM 26, LEM 510 pages

Liquid ring vacuum pumps
in compact design
SIHIextruvac
LEME 130, LEME 155
VACUUMTECHNOLOGY LEME
133.71330.52.01 E 04/2006
Pressure range: 100 to 1013 mbar
Suction volume flow: 30 to 170 m³/h
CONSTRUCTION TYPE
SIHI liquid ring vacuum pumps are displacement pumps of
uncomplicated and robust construction with the following particular
features:
non-polluting due to nearly isothermal compression
oil-free, as no lubrication in the working chamber
handling of nearly all gases and vapours
able to handle water carry over
easy maintenance and reliable operation
low noise and nearly free from vibration
wide choice of material, therefore applicable nearly
everywhere
shaft not contact with the medium
protection against cavitation as standard
incorporated dirt drain
incorporated central drain
no metallic contact of the rotating parts
The SIHI liquid ring vacuum pumps LEME are single-stage ones.
APPLICATION
Handling and exhausting of dry and humid gases. The pumps are
applied in all fields where a pressure of 100 to 900 mbar must be
created by robust vacuum pumps.
The LEME is specially designed to handle additional water that is
exhaust through the suction inlet.
NOTE
During operation the pump must continuously be supplied with
service liquid, normally water, in order to eliminate the heat
resulting from the gas compression and to replenish the liquid ring,
because part of the liquid is leaving the pump together with the gas.
It is possible to reuse the service liquid. The pumps are equipped
with a device by which the contaminated service liquid can
continuously be drained during operation (dirt drain), if necessary.
The direction of rotation is clockwise, when looking from the drive
on the pump.
GENERAL TECHNICAL DATA
Pump type unit LEME 130 LEME 155
Speed
50 Hz
60 Hz rpm 1450
1750
Max. compression over pressure bar 0.3
Max. admissible pressure difference bar 1.1
Hydraulic test (over pressure) bar 3
Moment of inertial of the rotating
pump parts and of the water filling kg . m² 0.053 0.069
Sound pressure level
at a suction pressure of 150 mbar
dB (A) 65
Max. gas temperature dry
saturated
°C
°C
200
100
Service liquid
max. admissible temperature
max. viscosity
max. density
°C
mm²/s
kg/m³
80
4
1200
volume up to shaft level litre 2.8 3.2
Max. Water handle capability m3/h 7.5
The combination of several limiting values is not admissible.