CASE STUDIES 4 - 6

Case Study 4. Compressed Air Driven Hydraulic Power Packs

Hire Torque Ltd, manufacturer of hydraulic torque wrenches, has a requirement for a compressed air driven power pack to work underground in a coal mine. The power pack had to be built of Aluminum free components. The power pack included a pneumatically operated directional control valve and motor stop/start operated from an operator held pendant.

The power pack, driven by a Globe air motor, delivered a flow of 3 LPM to a maximum pressure of 700 bar. The unit was mounted into a fabricated steel frame with lifting handles and wheels.

Case Study 5. Hydraulic Test System

Luxfer UK Ltd, a manufacturer of gas cylinders, pressure test cylinders with water to 600 bar. Luxfer were using a compressed air pump to generate the test medium and were finding difficulty in achieving accurate test readings due to the pulsations produced by the compressed air driven pumps.

CFP were asked to offer a solution to the problem and in response designed the intensifier driven by an hydraulic power pack. The result was control of the test pressure to an accuracy of +/-0.25% and a faster, more positive pressurizing of the test piece. Recently we have supplied a test rig (see photograph) with two intensifiers on one caster mounted frame to deliver 350 bar and 800 bar.

Case Study 6. Diesel Driven Power Packs

The customer, a large Construction and Grouting company in the West Midlands contacted us requesting supply of two diesel driven power packs in enclosures.

The packs had to be delivered in very quick time.

For the technically minded. The engines were Hatz three cylinder Silent Packs, the pumps were two Cassappa gear pumps delivering 100 LPM to 60 bar.

Each pump provided individual flow and pressure via directional control valves with remote operating levers, to two grouting systems.

The packs had oversized fuel tanks to enable the packs to run for 24 hours per fillup.