Resolving leaks in pneumatic systems will quickly save plants money and safeguard reliability, says Airsave's Pim Duterloo. Picture the scene. You are an engineer working in a process facility and have just installed a pneumatically-actuated valve. No expense has been spared to properly set everything up: the valve has been sourced from an A-list supplier, fitted with a state-of-the art positioner and connected to the plant's sophisticated control system. Shortly after commissioning, however, it is clear that the valve is not performing as expected. You check and double-check possible reasons: was the valve correctly sized, is a partial wire-break to blame or maybe there's a bug in the control software?
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