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The housing provides support for the hose whilst under compression from the shoe / rotor
assembly. A flange / insert mechanism is used to retain the hose position within the housing.
The flange uses a split collet design to clamp and seal the hose in the casing. The rotor runs in
a lubricant bath, which is filled either through the inspection cover or via a pipe at the rear of the
housing. Overall the unit is designed to enable simple assembly and maintenance
The pumps can be coupled to the drive gearbox motor unit in 2 different ways; either close
coupled (direct) or long coupled. The following is a brief description of the 2 variants.
Close-coupled design
The gearbox/motor unit is directly attached to, and supported by, a flange mounting at the rear of
the housing (Figure 2). The rotor and shoe assembly is fastened to the gearbox output shaft via
a taper lock bush
Figure 2
Long coupled design
A bearing housing assembly is directly attached to, and supported by a flange mounting at the
rear of the housing (Figure 3). The rotor/shoe assembly is fastened to the bearing housing
assembly output shaft via a taper lock coupling. The gearbox/motor unit is supported by a base
plate, which forms an integral part of the frame, and is attached to the bearing housing assembly-
input shaft via a coupling.
