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    • 2. 发明授权
    • Automatic center cavity equalizing valve
    • 自动中心腔均衡阀
    • US6016826A
    • 2000-01-25
    • US533774
    • 1995-09-26
    • Earl A. BakeLeonard J. Stephens
    • Earl A. BakeLeonard J. Stephens
    • F16K3/18F16K39/04F16K3/16
    • F16K3/188F16K39/04Y10T137/2567Y10T137/87281Y10T137/8733
    • An automatic center cavity equalizing valve for equalizing pressure in a main valve. The equalizing valve includes a body with a bore for providing fluid communication between an upstream port and a center cavity port, and a downstream port and the center cavity port. A metal ball is disposed within the bore and is arranged to mate with upstream and downstream seats to seal communication with the upstream or downstream port and the center cavity port depending upon the differential pressure across valve. The metal ball is spring biased against the downstream seat to prevent damage to the downstream seat due to rattling. In addition, access plugs are provided at opposite ends of the bore to allow for access to the interior of the bore for repairing or replacing the metal ball, the seats, and/or other internal components.
    • 一个自动中心腔均衡阀,用于平衡主阀中的压力。 均压阀包括具有用于在上游端口和中心空腔端口之间以及下游端口和中心空腔端口之间提供流体连通的孔的主体。 金属球设置在孔内并且布置成与上游和下游座配合,以根据跨越阀的压差密封与上游或下游端口和中心腔端口的连通。 金属球弹簧偏压抵靠下游座椅,以防止由于晃动而损坏下游座椅。 此外,在孔的相对端设有通道塞,以允许进入孔的内部,以修理或更换金属球,座和/或其它内部部件。