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Our screw pumps
are volumetric self-priming pumps suited to handle oils and liquids with a minimum lubricating quality. The simplicity of the
design makes these pumps intrinsically reliable and efficient. Three screws rotate inside a casing with close tolerances, thus forming sealed
chambers and provoking the axial displacement of the fluid. The idler spindles rotate without contact with the driving spindle because of the fluid
itself, thus being free from radial forces.
The accurate hydraulic balance and the special profile of the screw thread guarantee a continuous flow
with minimum pulsations and turbulance, thus enabling extremely low noise levels even at high rotational
speed.
The screws epicycloidal profiling is developed through a complex computerized calculation which not only
perfectly defines their shape, but also controls the production with continuous monitoring of the machining
process, consequently assuring a high degree of repeatable quality.
The high quality level is guarenteed by a final testing on 100% of the manufactured products.
We place the highest value on quality and we certify it
All Seim products are manufactured and tested in accordance with our ISO 9001 Quality Standard.
Our products are 100% tested either to Seim standards or customer requirements. Certification is
available on request.
Installation and maintenance manuals along with spare parts lists are available in multilingual format.
Seim Industrial Division Manufacturing Program features:
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Screw pumps:
std according to API 676, for mineral and lubricating oils also fluids with low
lubricating properties (water+oil, HFC, LFO, HFO). Flows up to 5,000 lires per minute and pressure upto
130 bar (200 bar peak).
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Motor pump sets:
close coupled, AC or DC electric motors.
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Pre-assembled systems:
with bell-housing and coupling arrangements.
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Skid mounted pumps:
with or without motor but suitable for horizontal or vertical mounting.
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High efficiency Air/Oil Heat Exchangers:
upto 14,000 kCal/h (16kW)
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Relief valves:
Flow rate from 50 to 1,200 litres per minute and pressure up to 40 bar
Lubrication Applications
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Lubricating system for: speed variators, turbines,
gearboxes, papermill machines, hot forming machines
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Lubrication system for the petrochemical, iron and steel,
and mining industries as well as shipbuilding.
Driving Applications
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Machine tools, bed traversing
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Hydraulic presses
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Hydraulic units for elevators
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Hydraulic supporting
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Rolling mills
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Test benches
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Sheet metal machines
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Plastic molding machines
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Medical Units
Recirculation and Filtering Applications
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COOLING LUBRICATION: deep hole drilling, pipe boring,
chip conveyors.
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FILTERING: mobile filtering systems, off-line filtering
systems for process machines and machine tools,
hydrualic presses, textile machines, grinding machines
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HEAT EXCHANGING: injectors heating for plastic molding
machines, heat exchangers.
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FLUSHING AND BOOSTING: piping systems washing,
hydraulic systems flushing, boost circuits.
Fluids to be pumped
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Hydraulic oils
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Lubricating oils
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Diathermic oils
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Oil-in-water emulsions (min. oil percentage 5%)
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Light and heavy fuel oils
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Phosphoric esters
II
SCREW PUMPS
INTRODUCTION
POMPE A VITI