Liquid ring vacuum pumps single stage LOH 20103, LOH 201070 pages

Liquid ring vacuum pumps
single-stage
LOH 20103, LOH 20107
VACUUM TECHNOLOGY LOH LI 1
133.71115.54.01 E 03/2008
Pressure range: 150 to 1013 mbar
Suction volume flow: 7 to 58 m³/h
CONSTRUCTION TYPE
Sterling SIHI liquid ring vacuum pumps are displacement pumps of
uncomplicated and robust construction with the following particular
features:
handling of nearly all gases and vapours
non-polluting due to nearly isothermal compression
oil-free, as no lubrication in the working chamber
small quantities of entrained liquid can be handled
easy maintenance and reliable
Low noise and nearly free from vibration
wide choice of material, therefore applicable nearly
everywhere
incorporated central drain
no metallic contact of the rotating parts
The Sterling SIHI liquid ring vacuum pumps LOH 20103 and
LOH 20107 are single-stage ones. They can be applied without
modification as compressors up to a compression pressure of 1 bar
(see catalogue part K).
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 a pressure of 150 to 900 mbar must be created by
robust vacuum pumps.
Fields of application are for example:
chemistry and pharmacy for distilling and
degassing,
electric industry for impregnation and drying
plastics industry for degassing etc.
NOTE
During operation the pump must be continuously supplied with
service liquid, normally water, in order to eliminate the heat
resulting from gas compression and in order 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).
Reuse of the service liquid is possible.
The direction of rotation of the pump is clockwise when looking from
the drive on the pump.
GENERAL TECHNICAL DATA
Unit LOH 20103 LOH 20107
Speed
50 Hz
60 Hz rpm 2800 1)
3400
2800 1)
3400
Max. compression over pressure bar 1
Max. admissible pressure difference bar 1,5
Hydraulic test (over pressure) bar 3
Moment of inertial of the rotating
pump parts and of the water filling kg . m² 0,0033 0,005
Sound pressure level
at a suction pressure of 200 mbar dB (A) 66 67
Min. pulley diameter permissible in
case of V-belt drive mm 80
Max. gas temperature dry
saturated
°C
°C
240
120
Service liquid
max. admissible temperature
max. viscosity
max. density
°C
mm²/s
kg/m³
100
90
1200
volume up to shaft level liter 0,9 1,0
Max. flow resistance of heat exchanger bar 0,2
The combination of several limiting values is not admissible.
1) normal speed