The high pressure 50Kw (200 Kg) Type XWH hydraulic pump is specifically designed for water-based fluids. Separation of the lubricating oil and the pumped fluid is achieved by the installation of a cavity between the cylinder block and the case. Bypass from the pistons is collected in this cavity and returned to the inlet side of the pump. The XWH pump incorporates six axial pistons actuated by a single rotating swash plate.

The pump can be supplied with duplex deliveries which may be used for simultaneous high and low pressure applications when used in conjunction with an automatic unloading valve.

SimplexDuplex

Various combinations of flows and pressures are possible within the 40 kw range up to a maximum of 636 bar at 46 litres/min or up to 187 litres/min at 155 bar – see table on the right.

Applications

This high powered pump is highly suitable for Blow Out Preventer (BOP) applications, hydraulic power units (HPUs) and flushing skids.

Material

All external components manufactured from 316 stainless steel – pump shaft is medium carbon steel EN9 or EN8M.

Weight

200 Kg

Pump characteristics options

	Piston	Theoretical flow			Max pressure
Pump No.	size (ins)	cc/rev	l/m	USg/m	bar	psi

Installation

Rotation is bi-directional and the pump may be mounted horizontally or vertically.

A suction filter of at least 60 microns should be used, and care should be taken to ensure that the filter is of adequate size and does not cause more than 300 mm Hg depression.

Pipes should be of sufficient size to give not more than 3.7m/sec velocity in the delivery line and 1.2m/sec in the suction line. The suction line should be kept under positive pressure when the pump is stationary to allow priming.