| 摘要 |
A valve control device includes an operating stem, a valve top plate, a valve seat rubber, a valve bottom plate, and a valve seat ring. The valve top plate has a conical base with at least three stabilizer arms extending therefrom. Each of the at least three stabilizer arms has a flat outer surface. The valve bottom plate secures the valve seat rubber between the valve bottom plate and a flat bottom surface of the valve top plate. The valve bottom plate, the valve seat rubber, and the conical base are mounted on the operating stem. The valve seat ring has multiple slots, with each of the slots corresponding to one of the at least three stabilizer arms. A standpipe drain system, a method of draining a standpipe, and a locking fire hydrant with a valve access channel drain also are described.
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