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  • Users: PRV2
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  1. PRV2

    Block valves on PSV discharge

    The block valves are 4" 150# full port gate valves.
  2. PRV2

    Block valves on PSV discharge

    3" 150# x 4" 150#, pilot operated relief valves, impossible to ensure system is isolated and purged without the valves
  3. PRV2

    Block valves on PSV discharge

    Hi, I am wondering if anyone is aware of a code that restricts the number of car sealed open block valves allowed on a ASME Section VIII PSV discharge. I need to hot tap a flare line to add a skid with a relief valve which will leave it with two block valves on the discharge permanently. I am...

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