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    • 10. 发明授权
    • Gate valve having service position
    • 闸阀具有维修位置
    • US07445019B2
    • 2008-11-04
    • US11749117
    • 2007-05-15
    • Arthur J. BrenesYoshi TakayamaJohn Duncan
    • Arthur J. BrenesYoshi TakayamaJohn Duncan
    • F16K31/122
    • F16K3/188F16K51/02Y10T137/0318Y10T137/0514Y10T137/6072
    • A gate valve including a valve housing defining a valve chamber having an opening therethrough along a flow path, a gate support supported within the valve housing between a closed position in the flow path, an open position outside of the flow path, and a service position extending out of the valve housing, and a dual actuator assembly having a service piston assembly having a service piston reciprocable within the valve housing, and an inner piston assembly having an inner piston reciprocable within the service piston assembly. The gate support is configured to reciprocate with the inner piston between the closed and open positions, and with the service piston between the closed and the service positions. A method of using the gate valve is also disclosed.
    • 一种闸阀,包括阀壳体,其限定具有沿着流动通道穿过的阀室的阀室;在所述阀壳体内支撑在所述流动路径中的关闭位置之间的门支撑件,在所述流动路径外侧的打开位置和所述维护位置 延伸出阀壳体的双重致动器组件,以及具有可在阀壳体内往复运动的维修活塞的维修活塞组件的双重致动器组件,以及具有可在使用活塞组件内往复运动的内部活塞的内部活塞组件。 门支撑构造成与内活塞在关闭位置和打开位置之间往复运动,并且服务活塞在关闭位置和服务位置之间。 还公开了一种使用闸阀的方法。