A ball valve that is equipped with an actuator that manipulates a stream of fluid in the response to a signal from an external sensing element and with input of energy from an external source.
A valve that can be used to modify (regulate) the fluid flow rate in a process control system. It usually includes an actuator, which responds to a signal from the controlling system and changes the position of the flow controlling element in the valve.
A detector that is intended to sense a flame.
A detector capable of detecting both heat and smoke.
A physical object that is a circular plate with no central opening and holes to match mating flanged ends. It is also equipped with a handle.
A self operating valve that is set to open at a certain pressure level to prevent the pressure in a container or system from reaching unsafe levels.
A physical object that is a general term covering switching devices and their combination with associated control, measuring, protective and regulating equipment, also assemblies of such devices and equipment with associated interconnections, accessories, enclosures and supporting structures.