CASE STUDIES 1 - 3

Case Study 1. Hydraulic Power Packs and Systems for Rubber Extrusion Machines

A Japanese manufacturer of rubber extruded components set up a new manufacturing plant in our area. Our long established customer, specialist machine builders Glenborough Engineering, were contracted to reproduce machines based on Japanese designs, but to meet CE requirements. CFP supplied complete hydraulic systems for a number of 17-ton extrusion machines.

At the heart of the hydraulic system were ATOS variable displacement piston pumps with proportional flow and pressure control allowing the machine to be driven by a 5.5kW motor instead of the 11kW which would have been necessary if the maximum flow and pressure was to be made available from a standard pump.

CFP also supplied Miller Hydraulic rams, Char Lynn hydraulic motors and ancillary equipment by other manufacturers to complete the build of the machines.

Case study 2. Engine Driven Hydraulic Power Packs

Balfour Beatty Power Transmissions division use power packs to deliver a pressure of 520 bar. The packs being used were causing problems with overheating. CFP were asked to investigate the availability of alternative Hydraulic Power Packs and systems which would solve the problem.

In investigating the cause of the overheating, it was discovered that the tool operators left the manual control valve in an operate position. Manual valves operating to 500 bar and higher with spring centering are rarely available and very expensive. Our solution was to design a hydraulic system which would unload the pump if the operator left the manual valve control handle in an operate position. Dynex Rivett manufactured the pumps and pressure control valves used; the engines were by Hatz GB. A tubular steel-lifting frame was manufactured to carry the engine, pump and reservoir with the hydraulic system unloader internally fitted, enabling the power pack to be transported by various means.

Similar hydraulic power packs were produced for EVE Tramscom but Honda Petrol engines drove these power packs and the pumps are HAWE radial piston type. (See photo on the home page).

Case Study 3. Hydraulic Power Pack System Operating Boiler Gas Diverters

Boiler gas diverter manufacturer Whalco required three power packs to operate in a gaseous atmosphere, which controlled the position of a gas diverter blade, and had an emergency back up which operated the blade in the event of power failure to the rig. The frame was made of stainless steel, the electric motor, solenoid valves and pressure switches were Eexd certified for use in explosive atmospheres. A 10 lire bladder accumulator stored the volume of oil at pressure for the emergency operation of the cylinders. All pipe work was in metric OD stainless steel pipe and Walterscheid fittings. ATOS manufacture the solenoid valves and the filters are by MP Filtri.