公开(公告)号：US06974121B2

公开(公告)日：2005-12-13

申请号：US10101139

申请日：2002-03-19

申请人： David John Koester ,  Sarah Lynn Dvorak ,  Lynn Dean Mahncke ,  Brandon Wayne Bell ,  Loree Lee Bovee ,  Gary Alan Witt

发明人： David John Koester ,  Sarah Lynn Dvorak ,  Lynn Dean Mahncke ,  Brandon Wayne Bell ,  Loree Lee Bovee ,  Gary Alan Witt

IPC分类号： F16K1/226 ,  F16K5/20 ,  F16K25/00

CPC分类号： F16K5/204

摘要： A control valve of the ball type with bi-directional shutoff capabilities is disclosed. The ball valve including an inlet and an outlet, a ball element and a seal assembly. When closing the valve, the ball element, which is eccentrically mounted on a shaft, rotates to abut the seal assembly. While closed, the seal assembly including a seal housing, a main seal and a resilient member, contacts the ball element at the main seal, while the resilient member biases the main seal toward the ball element. The seal assembly further includes a secondary flowpath between the main seal and seal housing, which is restricted by two unidirectional seal rings.

摘要翻译： 公开了具有双向关闭能力的球型控制阀。 球阀包括入口和出口，球形元件和密封组件。 当关闭阀时，偏心地安装在轴上的球元件旋转以邻接密封组件。 当封闭时，包括密封壳体，主密封件和弹性构件的密封组件在主密封件处接触球形元件，同时弹性构件将主密封件偏压朝向球形元件。 密封组件还包括在主密封件和密封壳体之间的二级流路，​​其由两个单向密封环限制。