Ultra high pressure pump

Citation

(2002), "Ultra high pressure pump", Anti-Corrosion Methods and Materials, Vol. 49 No. 6. https://doi.org/10.1108/acmm.2002.12849fad.009

Ultra high pressure pump

Ultra high pressure pump

Keywords: Pumps, High pressure systems, Water jetting

A new range of mobile high-pressure water jetting systems developed by Calder at its Worcester factory is shortly to take to the road with fully computerised controls that automatically decelerates the engine to tick-over when the lance trigger is released. Apart from increased versatility this feature is believed to make the new systems more economical to run, saving on fuel and component wear.

These latest versions of the Calder Multijet is said to bring a new level of sophistication to a product that has to withstand the daily rigours of industrial cleaning applications and concrete cutting. Driven by a very powerful 165 hp diesel engine, the new Multijet systems are able to deliver operating pressures up to 2,800 bar at various water dispersement rates. At 20 l/min it has a surprisingly light reaction force permitting extended manual operations for the removal of the toughest coatings on ships, bridges and steel tanks as well as the cutting of concrete. However a higher flow unit delivering high pressure water at 44 l/min is normally recommended for blasting large quantities of concrete or pipe cleaning projects.

Design of the new Multijet is reported to assure continuous, reliable performance. Low pressure feed pumps ensure sufficient water flow and pressure to the well-proven Hammelmann high pressure pump that in turn creates the required working pressure. A feature claimed of this particular pump is the use of a dynamic plunger sealing system, basically a self-adjusting, wear absorbing, easily replaceable labyrinth insert that ensures maximum volumetric efficiency.

Another design feature is the inclusion of a stainless steel filter with an innovative 3 micron cartridge reportedly ensuring that only clean water passes to the pumps thus eliminating component wear and maintaining high delivery pressure to the tools. It can be quickly cleaned and thus maximises “uptime”.

All components are mounted on a twin-axle trailer and enclosed within an acoustic hood ensuring noise-retention within the canopy. Calder has been careful in selection of the axle for this latest generation of water jetting systems. It uses the Euro-Axle that has mechanically fixed brake assemblies, sealed- for-life bearings and will absorb any possible vibration from the road, giving a smooth comfortable ride for the towing vehicle.

In addition to a standard range of towable water jetting systems, Calder has a wealth of engineering experience that enables it to design and build skid and containerised systems to satisfy different applications.

Details available from: Calder Ltd, Tel: +44 (0) 1905 723255; Fax: +44 (0) 1905 851777; E-mail: pumps@calder.co.uk