Fluid control valve having an adjustable valve stem and piston assembly

摘要

Fluid control valves having an adjustable valve stem and piston assembly are described herein. An example fluid control valve includes a piston to control a flow of fluid through a valve body, a bonnet having a threaded bore and a housing to be removably disposed within and threadably coupled to the bonnet. The housing includes a first portion to be disposed in the bonnet, a roller assembly to be pivotally mounted to the first portion, the roller assembly to engage the piston to control a position of the piston. The housing including a second portion with a threaded outer surface to couple to the threaded bore of the bonnet. A valve stem is to move through the housing to control the movement of the roller assembly and the piston.

主权项

1. An apparatus comprising:
a bonnet; a housing to be removably coupled within the bonnet via a threaded portion of the housing, wherein a position of the housing relative to the bonnet is adjustable by rotating the housing relative to the bonnet to calibrate a position of a valve stem relative to a piston; and a roller assembly including rollers mounted on the housing, at least one of the valve stem or the piston is to interact with at least one of the rollers, the roller assembly is to engage the piston to move the piston in response to a movement of the valve stem to control a position of the piston.