Bg Corporation

David Thomas Murphy

Ian Andrew Carscadden

Donald James Reid

A portable diagnostic system for testing gas pressure reduction equipment includes a computer arrangement interfaced to an electro-pneumatic test unit which provides test pressures for and receives information on displacement from the pressure reduction equipment. Unit includes a number of valves including three solenoid on/off valves, a needle valve and an on/off ball valve. The position of the valve member of the needle valve is sensed by a position transducer. Displacement transducers and connected to the reduction equipment sense slamshut valve and regulator displacements pressure transducer and a differential pressure transducer are each connected to the equipment. Signals from the transducers are fed to a data acquisition system which also drives the solenoid valves and the needle and ball valves, all under the control of the PC to give an indication for example of how far the valves are open in the regulating equipment (ie from the valve seat).

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Newcastle-upon-Tyne, United Kingdom

David Thomas Murphy