Bolted valve control element

摘要

A control element for a fluid flow control device includes a stem, a plug, and a fastener. The stem includes an elongated member with a first end and a second end. The first end is adapted to be operably coupled to an actuator and the second end including a fastener recess including a plurality of internal threads. The plug is disposed adjacent to the second end of the stem. The fastener fixing the plug to the stem and includes a threaded portion extending from the plug and engaging the plurality of internal threads of the fastener recess.

主权项

1. A control element for a fluid flow control device, the control element comprising:
a stem comprising an elongated member with a first end and a second end, the first end adapted to be operably coupled to an actuator and the second end including a fastener recess including a plurality of internal threads; a plug disposed adjacent to the second end of the stem; a fastener fixing the plug to the stem, the fastener including a threaded portion extending from the plug and engaging the plurality of internal threads of the fastener recess; and an anti-rotation device disposed between the second end of the stem and the plug for preventing rotation of the stem relative to the plug and fastener, wherein the anti-rotation device comprises washer having a disc-shaped body and one or more tabs extending radially outwardly from the disc-shaped body, and the second end of the stem includes one or more flat surfaces each engaging a corresponding tab of the one or more tabs.