公开(公告)号：US20140090727A1

公开(公告)日：2014-04-03

申请号：US13659041

申请日：2012-10-24

Applicant: EMERSON PROCESS MANAGEMENT REGULATOR TECHNOL

Inventor： Tung K. Nguyen ,  Jason Scott Mevius ,  Biao Zhou

IPC: G05D16/06 ,  F16K39/00

CPC classification number: G05D16/0694 ,  G05D16/02 ,  Y10T137/261 ,  Y10T137/7801

Abstract: A balanced port control assembly includes a control element with a valve plug coupled to a valve stem and a pressure sensing labyrinth defined at least partly by the valve plug. The pressure sensing labyrinth provides for fluid communication between a sealing surface of the valve plug and a balancing diaphragm carried internally of the control element. The pressure sensing labyrinth includes at least one pressure sensing passage extending from the sealing surface and into the valve plug along a central longitudinal axis of the control element. So configured, fluid pressure resident on the sealing surface of the valve plug is also resident on the balancing diaphragm such that equal and opposite forces are applied to the control element.

Abstract translation: 平衡端口控制组件包括具有连接到阀杆的阀塞的控制元件和至少部分地由阀塞限定的压力感测迷宫。 压力感测迷宫提供在阀塞的密封表面和在控制元件内部承载的平衡膜之间的流体连通。 压力感测迷宫包括沿着控制元件的中心纵向轴线从密封表面延伸到阀塞中的至少一个压力感测通道。 如此构造，驻留在阀塞的密封表面上的流体压力也驻留在平衡隔膜上，使得相等和相反的力施加到控制元件。