A blow-off valve (4" ANSI , Cl 1500 Stainless steel SS316 Globe valve) is installed at the discharge line of a CO2 compressor ( Integrally geared) before its NRV and the compressor discharge pressure is 160 barg. This blow off valve is provided with a fail open actuator. . During HAZOP study a scenario on the Valve Stuck close on demand was brought in and discussed. This led to a recommendation for improving the reliability of the BOV which is basically a spring loaded valve. The fail to open during the trip of the compressor would be detrimental to the compressor due to reverse rotation.
Would like to put forth in this forum whether the above valve struck scenario , which is basically a mechanical struck can be managed with any other arrangement ?
Thanks for your support.
Would like to put forth in this forum whether the above valve struck scenario , which is basically a mechanical struck can be managed with any other arrangement ?
Thanks for your support.