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RE: Actuation and Interlocks of Valves



Reliance is operating 2 world’s largest Cokers ,each @160KBPSD-8 drums, at Jamnagar India. We are operating at 13 hrs coke drum cycle.
We have interlocked all coke drum and blowdown column valves  using the DCS  software which doesnot require a separate PLC etc. This has been very reliable safety interlock for the last 7 years of operation.
We use Velan valves (mostly ball valves ) with motor actuators and these are very reliable.
Wilson Snyder switch valve  could also be automated as done way back in 1993 in  KNPC cokers (Hydraulic automation ).
Best wishes.
India Jamnagar

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