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1. 发明授权

US3883113A Fluid control ball valve structure for throttling service 失效
标题翻译：流量控制球阀结构用于节流服务
公开(公告)号：US3883113A
公开(公告)日：1975-05-13
申请号：US45608474
申请日：1974-03-29
申请人： ACF IND INC
发明人： KOLB JOHN P
IPC分类号： F16K5/06
CPC分类号： F16K5/0605
摘要： A ball valve structure having a ball member with upstream and downstream circular edge portions defining the entrance and exit ports of the ball member which ports are positioned adjacent the upstream and downstream seat members. Each of the circular edge portions has a generally arcuate groove or indentation therein positioned on the circumferential segment of the respective circular edge portion initially clearing the adjacent associated seat member upon rotation of the ball member from a fully closed position thereby increasing substantially the flow area exposed to fluid flow upon the initial opening of the valve member.
摘要翻译：一种球阀结构，其具有球形件，其具有上游和下游圆形边缘部分，其限定所述球形构件的入口和出口，所述端口邻近所述上游和下游座椅构件定位。每个圆形边缘部分具有大致弧形的凹槽或凹槽，其位于相应的圆形边缘部分的周向部分上，当滚珠构件从完全关闭位置旋转时，初始地清除相邻的相关联的座椅构件，从而大大增加暴露的流动面积在阀构件的初始打开时流体流动。

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