Screw Pumps

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.

The accurate hydraulic balance and the special profile of the screw thread guarantee a continuous flow with minimum pulsations and turbulance, resulting in extremely low noise levels even at high rotational speed.

The screws epicycloidal profiling is developed through a complex computerised calculation which not only perfectly defines their shape, but also controls the production with continuous monitoring of machinery process, consequently assuring a high degree of repeatable quality.

The high quality level of these screw pumps is guaranteed by a final testing on 100% of the manufactured products.

Product options include:

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).

Please see www.jbj.co.uk/screwpumps.html for full details including technical specification documents.