초록 ▼

In a valve of the ball or globe type operating means are provided to cause movement of the closure member in an angular mode about an axis of rotation and in a radial direction with respect to such axis in order that the closure member may be removed from the seat prior to subtantial angular movemen

In a valve of the ball or globe type operating means are provided to cause movement of the closure member in an angular mode about an axis of rotation and in a radial direction with respect to such axis in order that the closure member may be removed from the seat prior to subtantial angular movement. The operating means comprises two concentric stems one of which comprises an eccentric portion journalled with the closure member which eccentric portion provides the radial movement. The housing comprises an inspection port against which the closure member may be sealed while the valve remains open permitting inspection and replacement of the main seal through the inspection port while fluid continues to flow through the valve.

대표청구항 ▼

A valve for use in a pipeline comprising; a housing; said housing having an inlet, an outlet and an internal chamber to accommodate a closure member and an inspection port; a closure member contained within said housing, said closure member and said housing having co-operating sealing means for seal

A valve for use in a pipeline comprising; a housing; said housing having an inlet, an outlet and an internal chamber to accommodate a closure member and an inspection port; a closure member contained within said housing, said closure member and said housing having co-operating sealing means for sealing said inlet; said closure means movable from a closed position blocking fluid flow through said valve to an open position permitting fluid flow through said valve; operating means to move said closure member, including main means to move said closure member angularly about an axis and auxiliary means to move said closure member radially with respect to said axis; said means to move said closure member angularly including an upper main stem and a lower main stem, said upper main stem and said lower main stem located on opposite sides of said closure member; said means to move said closure member radially including an upper auxiliary stem, and a lower auxiliary stem, said upper auxiliary stem and said lower auxiliary stem located on opposite sides of said closure member, and a connecting bar contained within said housing and connecting said upper auxiliary stem and said lower auxiliary stem so that said upper auxiliary stem and said lower auxiliary stem may be moved simultaneously.