Screw Pumps
These screw pumps are volumetric self-priming pumps suited to handle oils and liquids with a minimum lubricating quality. The design simplicity makes these screw pumps intrinsically reliable and efficient.
1) Screw Pump application and characteristics
» Screw pump flow rates up to 5.400 lpm, larger flow rates are available upon request.
» Pressure up to 200 bar, higher pressure versions are available upon request.
» Suitable for lube oils (mineral and synthetic – even at high viscosity > 100.000 cSt, HFC fluids, water based emulsions, cutting oils, aeronautic and dielectrical fluids, LFO and HFO, silicon fluids).
» Execution conform to API 676 (latest edition).
» ATEX compliant
» Built in
relief valve
, optional.
2) Screw pump applications
Lubrication Applications
» Lubricating system for: speed variators, turbines, gearboxes, papermill machines, hot forming machines.
» Lubrication system for the petrochemical, iron and steel, and mining industries as well as shipbuilding.
Driving Applications
» Machine tools, bed traversing.
» Hydraulic presses.
» Hydraulic units for elevators.
» Hydraulic supporting.
» Rolling mills.
» Test benches.
» Sheet metal machines.
» Plastic molding machines.
» Medical Units.
Recirculation and Filtering Applications
» Cooling Lubrication: deep hole drilling, pipe boring, chip conveyors.
» Filtering: mobile filtering systems, off-line filtering systems for process machines and machine tools, hydrualic presses, textile machines, grinding machines.
» Heat Exchanging: injectors heating for plastic molding machines, heat exchangers.
» Flushing and Boosting: piping systems washing, hydraulic systems flushing, boost circuits.
Fluids to be pumped
» Hydraulic oils.
» Lubricating oils.
» Diathermic oils.
» Oil-in-water emulsions (min. oil percentage 5%).
» Light and heavy fuel oils.
» Phosphoric esters.
3) Characteristics
» Compatible with a wide range of viscosities from 1 to 12,000 cSt and above.
» Efficiently working also at very low temperatures (-20°C).
» High self-priming capacity.
» High rotation rates = minimizing the size and cost of the pump.
» Steady flow rate = maximum efficiency in heat exchange applications.
» Special design for systems with entrained air in the lubricant = minimizing the vibrations and noise caused by air.
» Minimum sensitivity to particle pollution = longest life of the pump and circuit.
» Continuous operating pressures up to 130 bar, peak 200 bar.
» Pulsation-free = maximum efficiency of filtering applications.
» Extremely quiet.
4) Product Options
Screw pumps: standard 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 litres per minute and pressure up to 130 bar (200 bar peak).
SAE counterflanges.
Motor pump sets: close coupled, AC or DC electric motors.
Pre-assembled systems: with bell-housing and coupling arrangements.
Skid mounted pumps: with or without motor but suitable for horizontal or vertical mounting.
High efficiency Air/Oil Heat Exchangers: up to 14,000 kCal/h (16kW).
Off-line filtration systems (filtration trolley) and complete stand alone systems, also for machine tools).
Relief valves: Flow rate from 50 to 1,200 litres per minute and pressure up to 40 bar.
ATEX approval for use in explosive atmospheres: ATEX Zone 0 & 1 (for some models).
