Abstract: A control valve structure and combined visual indicator for controlling fluid and visually indicating the operating condition of a portion of a fluid system. The control valve has a slide valve mounted in a housing and biased toward a retracted position with one end portion thereof extending from the housing. The extended end portion of the slide valve has a knob adapted to be manually gripped for moving of the slide valve outwardly for setting same. A visual indicator is mounted on the knob. A port in the housing communicates with the slide valve to permit the application of fluid pressure to the slide valve to move same outwardly. The visual indicator has a visually observable indicator member movable between two positions for indicating the presence of either of two associated conditions in a system containing the control valve.

Abstract: A rotary actuator for a valve is associated with an indicator mechanism provided entirely exteriorily to the housing of the valve and out of axial alignment with the valve spindle. The indicator rotates with an actuating member of the valve and is movable relative to a surface of the actuating member to provide a visual and tactile indication of the operative position of the valve.