SIHILPH-X - Liquid Ring Vacuum Pump One Stage LPH 40106, LPH 40411, LPH 405160 pages

SIHILPH-X - Liquid Ring Vacuum Pump
One Stage
LPH 40106, LPH 40411, LPH 40516
VACUUM TECHNOLOGY LPH LI 2
133.71120.61.01 E 03/2008
Pressure Range: 150 to 1013 mbar
Suction Range: 50 to 270 m³/h
CONSTRUCTION
Sterling SIHI liquid ring vacuum pumps have a simple but robust
construction with the following features and benefits:
Near isothermal compression
Oil free, with no internal lubrication
Capable of handling almost all gases and vapours
Able to handle quantities of liquid “carry over”
Low maintenance and safe operation
Low noise and almost vibration free
Available in a wide range of materials
Broad range of applications
O-ring sealing as standard
Cavitation protection as standard
Drain hole as standard
Built-in solids drain
Rotating metallic parts are non contacting to minimise wear
ATEX compliance
Sterling SIHI liquid ring vacuum pumps of the range LPH 40106,
LPH 40411 and LPH 40516 are one stage pumps. They can be
used as compressors up to a pressure of 1.2 bar without any
modification (see the Technical Catalogue - Liquid Ring
Compressors Part K).
APPLICATIONS
Evacuation and pumping of dry gases and saturated vapours. The
pumps can also handle liquids. These units offer pressures in the
range of 150…900 mbar(a) to atmospheric. Typical application
areas include:
Chemical and pharmaceutical industry for distillation, drying and
degassing.
Electronic industry for impregnation and drying.
Plastics & Rubber industry for degassing.
NOTE
By continuously feeding the pump 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. The
condensed gas and fluid can be separated in a liquid separator (see
Accessories Catalogue). 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. More
information is provided in the accessory catalogues. The integrated
solids drain permits the removal of any entrained solids whilst the
pump is operating. The service liquid can, therefore, simply be recirculated.
The rotation of the pump is clockwise when viewed from
the drive end.
GENERAL TECHNICAL DATA
Pump Type Units LPH 40106 LPH 40411 LPH 40516
Speed 50 Hz
60 Hz
rpm
rpm
1450 1)
1740
Maximum overpressure on compression bar 0.8 1.5 1.5
Maximum permissible pressure difference bar 1.5 1.5 1.5 or 1.2 2)
Water pressure test (Overpressure) bar 3.0
Moment of inertia of rotating parts of pump
and of water content
kg . m² 0.0375 0.05 0.065
Noise level at 200 mbar suction pressure dB (A) 65
Minimum permissible pulley diameter for V belt drive mm 160
Max. Gas temperature: dry
saturated
°C
°C
240
120
Service liquid:
Max. permissible temperature
Max. viscosity
Max. density
°C
mm²/s
kg/m³
100
90
1200
Liquid capacity up to middle of shaft litre 3.5 4.5 5.5
Maximum flow resistance of the heat exchange 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. 1) Normal speed 2) With material execution 4B at 60Hz