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  1. massunpcao

    API - 614

    On API-614 (Lubrication, Shaft-Sealing, and Control-Oil Systems and Auxiliaries for Petroleum, Chemical and Gas Industry Services), item 6.4.9.5 says "Control valve(s) may be either DIRECT-ACTING or pneumatically-operated.". 1 - What is a direct-acting valve? Is is the same as a...
  2. massunpcao

    Line integrity monitoring - SIS Design

    I would like to know some manufacturers of line monitoring equipment for instrumentation signal lines. For instance, I would like to know when the line that carries the 4-20A signal from a field transmitter has broken. Best, Marc Assunpcao
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