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  1. reliablesam

    Use of ESDV as DBB valve

    Any tight on/off shutoff valve like an ESD valve can be used in a DBB arrangment. The ESD valve can be used if you are going to isolate any segment of your process from neigboring segments without affecting the production.
  2. reliablesam

    Use of Control Valve as ESD valve

    Hi You have to check IEC 61508 which outlines how any safety insttrumented system (SIS) shall be designed. An effective emergency shutdown system shall be completely independent from any control system otherwise it can be affected adversly by any failure in the control system. I agree also with...

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