ESD VALVE SELECTION GUIDE GENERAL ESD VALVE …

ESD VALVE SELECTION GUIDE . GENERAL ESD VALVE DEFINITION. ESD/ESV valves are the final defence against proc- ess misreactions. These valves have a function which requires much more reliable performance than standard remotely operated on-off valves . Still today ESD valves are ranked often as ordinary shut-off valves in specifications. valves as such may still remain the same but being a part of Safety Instrumented Function (SIF) the performance expectations are much higher. There must be a prove for a reliable long term performance. MTBF. (Mean Time Between Failure) number needs to be given to Safety calculations (SIL). ESD / ESV valves are in modern systems con- nected to Programmable Locig Controller (PLC) This is the most critical situation for valves . Unless and are together with sensors forming a Safety the VALVE is not frequently tested there is no guar- Loop. Whenever sensors identity an upnormal dan- antee that it is available and does the desired gerous process situation PLC disconnects the safety function.

ESD VALVE SELECTION GUIDE - 3 - 3. VALVES 3.1 Valve series to be considered Ball Valves Butterfly valves 3.2 Selection process Application type Emergency closing or venting, note if selected valve is capable for partial stroke testing (eg. venting vs. but -

Loading..

Tags:

  Selection, Valves, Ball, Valve selection

Information

Related search queries