Blowdown valve (BDV) is a block valve that is actuated through the ESD system which is situated in the system requiring pressure depressurisation during plant emergeny or shutdown. BDV is not used in process control.
BDV is typically with shutdown valve but in the reverse condition.(BDV is Fail Open valve, SDV is Fail Closed valve)
Showing posts with label on-off valve. Show all posts
Showing posts with label on-off valve. Show all posts
Tuesday, April 23, 2013
The Logic Behind The Magic. “Shut Down Valve".
The isolation of sections of plant will typically be an engineering judgement based on:
1. The purpose for the isolation; either maintenance/operation or shutdown
2. The design condition of the section, particularly pressure
3. The nature of the fluid in the section, e.g. flammability, toxicity etc
Isolation of a section for shutdown purpose will always consist of a single, actuated valves on the perimeter, which will respond to a shutdown signal(s) from ESD systems. Single shutdown valves are normally sufficient for the event initiating the shutdown and associated risk
1. The purpose for the isolation; either maintenance/operation or shutdown
2. The design condition of the section, particularly pressure
3. The nature of the fluid in the section, e.g. flammability, toxicity etc
Isolation of a section for shutdown purpose will always consist of a single, actuated valves on the perimeter, which will respond to a shutdown signal(s) from ESD systems. Single shutdown valves are normally sufficient for the event initiating the shutdown and associated risk
Subscribe to:
Posts (Atom)