Liquid ring compressors LOH 055010 pages

Liquid ring compressors
LOH 05501
VACUUM TECHNOLOGY KPH K 1
133.72105.54.01 E 12/2008
Compression pressure: 0.2 to 2 bar
Volume flow: 2.8 to 4.8 m³/h
CONSTRUCTION
Sterling SIHI liquid ring compressors have a simple but robust
construction with the following features and benefits:
Capable of handling almost all gases and vapours
Near isothermal compression
Oil-free, with no internal lubrication
Low maintenance and safe operation
Low noise and almost vibration free
Available in a wide range of materials
Broad range of applications
Rotating metallic parts are non contacting to minimise wear
ATEX compliance
The LOH 05501 operates according to side channel principle and
therefore the pump has the advantage, besides the abovementioned
features to handle large quantities of entrained liquid.
Sterling SIHI liquid ring compressors of the range LOH 05501 are
two-stage compressors. They can be used as vacuum pumps up to
a suction pressure of 80 mbar without any modification. (See the
Technical Catalogue – Liquid Ring Vacuum Pumps).
APPLICATIONS
Pumping and compressing of dry gases and saturated vapours; the
compressors can also handle liquids. The compressors are applied
in all fields where a compression over pressure of up to 2 bar has to
be created by robust compressors and only a small increase in
temperature is admissible during compression.
Typical application areas include:
- the plastics industry, for recovery of process gases
as vinyl chloride
- the petrochemical industry, for the compression of
combustible gases as gasoline vapours or hydrogen
- transport of gases in general e.g. to a reactor
NOTE
By continuously feeding the compressor with a small amount of
service liquid (usually water), the heat due to gas/vapour
compression is conducted away. This also replenishes the liquid
ring and ensures that it does not become saturated with process
media. Recharging the pump with service liquid at ambient
temperature enables the unit to condense evacuated
gases/vapours. It can therefore be used for solvent recovery. The
condensed gas and liquid can be separated in a pressure liquid
separator. More information is provided in the accessory
catalogues.
The service liquid can simply be re-circulated.
The rotation of the pump is clockwise when viewed from the drive
end.
GENERAL TECHNICHAL DATA
Pump Type Units LOH 05501
Speed rpm 1450 1700
Maximum overpressure on compression bar 2
Maximum permissible pressure difference bar 3
Hydraulic test pressure (overpressure) bar 4
Moment of inertia of rotating parts of pump
and water content kg . m² 0.0033
Noise level at 80 mbar suction pressure dB (A) 69 70
Minimum permissible pulley diameter for V belt drive mm 100 112
Maximum gas temperature dry
saturated
°C
°C
200
100
Service liquid:
Maximum permissible temperature
Maximum viscosity
Maximum density
°C
mm²/s
kg/m³
80
90
1200
Liquid capacity up to middle of shaft litre 1
Maximum flow resistance of the heat exchanger bar 0.2
In selecting a pump, avoid choosing one which is likely to be operating at a combination of its maximum permissible limits
e.g. maximum viscosity and maximum permissible pressure difference.