An Emergency Shutdown (ESD) system is a process safety control system which overrides the action of the basic control system when predetermined conditions are violated that includes an emergency shutdown valve (ESD Valve) and an associated valve actuator. The Emergency Shutdown Controller provides output signals to the ESD valve in the event of a failure in the process control system. (Refer to the Emergency Shutdown Device)
Related Definitions in the Project: The CSI Engineering; Process Safety Engineering
