Reliable Pumping From Versatile TopGear Pumps
7 November 2007
When reliability is of paramount importance to your liquids handling application, regardless of your need to transfer either thin or thick liquids, the choice of pump is crucial. Understandably, the focus of pump users is not the pump itself, but more importantly, its ability to provide smooth, uninterrupted production and at a lower cost.
In these situations TopGear pumps, available from JP Pumps (a division of the SPX Process Equipment Operation) provide the highest levels of reliability and long life with capacities from 0.5 m3/h up to 125 m3/h at pressures up to 20 bar. The range of pumps is divided into three main ranges; the L-range for low viscosity, high efficiency, the G – range for general purpose liquids transfer and the H – range for more demanding applications.
A key feature of TopGear pumps is the improved design of the integral gear section with an optimised teeth profile to ensure smooth and efficient flows for either free-flowing or highly viscous media. The pump’s simple, yet effective operating principle starts with the rotor and idler un-meshing, creating an under-pressure with the liquid entering the newly created cavities. Liquid is transported in sealed pockets to the discharge side of the pump. The walls of the pump casing and the crescent create a seal that separates suction from the discharge side. Finally, the rotor and idler mesh and liquid is pushed into the discharge line.
Other features and benefits of the TopGear H and G models include improved priming and low NPSHr with maximized ports and ports above the centerline, optimum efficiency with axial rotor locking, adjustable clearances and hydraulic design. Less downtime and minimal maintenance is assured thanks to the front and back pull-out panels and the simple cartridge design, while long life is assured with the pumps compact rotor, strong shafts and maximized bearing design.
The L range offers high volumetric efficiency thanks to small radial and axial clearances ensuring reduced slip plus optimized rotor and gear shape. Long service life is assured by large bearings diameters, rotors machined in one piece from steel bar and hardened interior parts while less downtime is achieved with the pumps and motors flanged to pedestals providing correct alignment between the pump and drive shaft.
A range of options are offered which enable the pumps to meet specific application requirements. For example; packed gland, single and double mechanical, lip and cartridge seals, heating and cooling jackets and single and double safety relief valves. TopGear pumps are suitable for a wide range of applications including petrochemicals, chemicals, paint and ink, resins and adhesives, pulp and paper and also food processing.
Further details are available from Peter Robinson, JP Pumps Ltd,
(a division of the SPX Process Equipment Operation).
Meadow Brook Industrial Centre, Maxwell Way, Crawley, West Sussex, RH10 9SA,
Tel: +44 (0) 1293 553495 Fax: + 44 (0) 1293 524635
Email: email@example.com www.johnson-pump.com/