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    • 3. 发明授权
    • Adjustable relief valve
    • 可调安全阀
    • US4248265A
    • 1981-02-03
    • US959985
    • 1978-11-13
    • Norman L. Freeman, Jr.
    • Norman L. Freeman, Jr.
    • E21B33/068E21B33/14E21B34/02F16K17/10
    • E21B33/068E21B33/14E21B34/02F16K17/10Y10T137/7781Y10T137/7839Y10T137/7841Y10T137/7846Y10T137/87981Y10T137/8803
    • An improved adjustable relief valve is provided having a valve body with a valve body inlet and outlet disposed therein. A reciprocating plunger is disposed in said valve body, and is movable between a first closed position isolating said valve body inlet and outlet, and a second open position communicating said valve body inlet and outlet. A pilot valve means is operatively associated with said plunger to control the flow of fluid from said valve body inlet to said plunger. Both said plunger and said pilot valve means have adjustable spring means for urging them toward their respective closed positions. An auxiliary means is provided for opening said relief valve without varying the adjustments of said spring means, so that said relief valve may be purged with a cleansing fluid.
    • 提供了一种改进的可调安全阀,其具有阀体,其中设置有阀体入口和出口。 往复式柱塞设置在所述阀体中,并且可在隔离所述阀体入口和出口的第一关闭位置和连通所述阀体入口和出口的第二打开位置之间移动。 先导阀装置与所述柱塞可操作地相关联,以控制从所述阀体入口到所述柱塞的流体流动。 所述柱塞和所述先导阀装置都具有可调节的弹簧装置,用于将它们推向它们各自的关闭位置。 提供了用于打开所述安全阀的辅助装置,而不改变所述弹簧装置的调节,使得所述安全阀可以用清洁流体清洗。