Liquid ring vacuum pumps sterilisers SIHI extruvac LEMS 30, LEMS 550 pages

Liquid ring vacuum pumps for sterilisers
in two-stage and compact design
SIHIsterivac
LEMS 30, LEMS 55
VAKUUM TECHNOLOGY LEMS
133.71222.52.01 E 03/2008
Pressure range: 33 to 1013 mbar
Suction volume flow: 9 to 57 m³/h
CONSTRUCTION TYPE
Sterling 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 working chamber
handling of nearly all gases and vapours
small quantities of entrained liquid can be handled
easy maintenance and reliable operation
low noise and nearly free from vibration
protection against cavitation as standard
incorporated central drain
no metallic contact of rotating parts
Sterling SIHI liquid ring vacuum pumps of the LEMS series are
two-stage ones.
APPLICATION
Handling and exhausting of dry and humid gases; entrained liquid
can be handled during normal duty. The pumps are applied in all
fields where pressures of 33 ... 900 mbar must be created by robust
vacuum pumps.
NOTE
During operation the pump must continuously be supplied with
service liquid, normally water, in order to eliminate the heat
resulting from then gas compression and to replenish the liquid ring,
because part of the liquid is leaving the pump together with the gas.
This liquid can be separated from the gas in a liquid separator (see
catalogue part accessories).
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.
GENERAL TECHNICAL DATA
Pump type unit LEMS 30 LEMS 55
Speed
50 Hz
60 Hz 1/min 2900
3500
Max. compression over pressure bar 0.3
Max. admissible pressure difference bar 1.1
Moment of inertial of rotating pump parts
and of the water filling kg . m² 0.004 0.0065
Sound pressure level at
Suction pressure of 80 mbar
dB (A) 63 63
Max. gas temperature dry
saturated
°C
°C
200
100
Service liquid
max. admissible temperature of
material design 0A
max. viscosity
max. density
°C
mm²/s
kg/m³
80
4
1200
Volume up to shaft level litre 1.0 1.2
Max. flow resistance of the
heat exchanger bar 0.2
The combination of several limiting values is not admissible.