Control Valves and Drains
More Examples of Indicating Control Valves
Wall Post Indicator Valve The wall post indicator valve operates the same way as the post indicator valve, but it extends through the exterior wall of the building and is mounted horizontally. A wheel operates the valve, and you can see its status by the word “open” or “shut” as read through a window in the valve stem housing. Butterfly Valve The butterfly valve is hand-cranked open or shut by rotating a disc through the water stream perpendicular or parallel to the water flow. On top of the valve is a “tattle tail” that moves with the disc to indicate the position of the disc relative to the water flow. When the flag lines up parallel to the pipe, the valve opens fully. When it is perpendicular to the pipe, the valve closes fully. |
|
