automatic valves; automated valves for controlling fluid flow; valve automation equipment comprising electronic controls; control valves for regulating the flow of gases and liquids; electric valve actuators; electronic valves for controlling gas or fluids; pressure indicating plugs for valves; pressure relief valves for air or liquid; safety valves for flow shutoff in well construction; solenoid valves; electromagnetic switches; thermally activated manually resettable fire safety valves; pro...