An emergency shut off Damper is an actuated valve designed to stop the flow of a hazardous fluid upon the detection ofa dangerous event. This provides protection against possible harm to people, equipment or the environment. Shutdown dampers form part of a Safety instrumented system. The process of providing automated safety protection upon the detection of a hazardous event is called Functional Safety. Shutdown dampers are primarily associated with the petroleum industry although other industries may also require this type of protection system.