PERFORMANCE THROUGH REVOLUTION

BOSS has a complete range of gear pumps for both mobile and industrial market segments.

Complete Range
BOSS gear pumps are available in four frames sizes giving displacements from 0.80cc/rev. to 151.33cc/rev.  Pumps are also available in Tandem  and Triple configurations and  the company specializes in supplying pumps to special order instructions.

HIGH EFFICIENCY
High volumetric efficiency produced by BOSS pumps are achieved in part by careful attention to the control of gear tip leakage. The body to gear geometry is arranged such that during the running-in test cycle, to which every pump is subjected, the gears cut perceptible tracks in the body. These results in virtually zero clearance between the gear tips and body producing a near perfect tip seal under running conditions.

Floating composite business are used in BOSS pumps, which house the bearing liners and provide a face seal to the gear. This efficient seal is achieved by pressure loading precise areas of the bush rear face with fluid at working pressure special features are incorporated in the bush sealing face to compensate for operating variables such as pressure, speed and temperature.  The BOSS pressure balancing system ensures a minimum net load on the bush bearings for high mechanical efficiency, while at the same time varying the pressure distribution across the bush faces with the change in system pressure, thus contributing to high volumetric performance.

Performance
DU lined/bimetal bearings are used to sustain high journal loads when operating @210 bar and speed up to 3500 RPM. BOSS has developed special journal surface finishes and treatment, to obtain maximum benefits from these bearing configurations. Low pressure bearing lubrications is a feature of all BOSS pumps. This is achieved by utilising the expression generated when the gear teeth separate to draw lubricating fluid from the inlet port and along each bearing journal by way of passage in the composite bush. This proven system ensures efficient cooling and lubrication of the bearings with a constant supply of fluid, independent of operating condition.

Durability
High tensile aluminum alloy bodies are used throughout the range to ensure uniformity in material properties and maximum fatigue strength. Through-body bores enable precise alignment of the bearings and hence maximum baring load capacity. Careful attention to machining details are surface finishes, holds wear rates to a minimum and promotes an extended operation life.

BOSS pumps have been designed to perform with a wide range of fluids and can be supplied with either Nitrile or Viton seals are standard