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Valve stem having conditioned lubricating surfaces

A conditional, valve stem technology, applied in valve details, valve devices, engine components, etc., to solve problems such as increased packing friction and reduced valve performance

Active Publication Date: 2014-11-05
FISHER CONTROLS INT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally or alternatively, excessive packing stress may increase packing friction between the packing seal and the valve stem or shaft, which may degrade valve performance, and / or, the valve packing and / or the valve stem or stem operating life of

Method used

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  • Valve stem having conditioned lubricating surfaces
  • Valve stem having conditioned lubricating surfaces
  • Valve stem having conditioned lubricating surfaces

Examples

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Embodiment Construction

[0015] In general, the exemplary methods and devices described herein substantially reduce or prevent material transfer across a dynamic mechanical interface between two dissimilar materials. More specifically, the methods and apparatus described herein significantly reduce the difference between a first or hard material surface and a second or relatively soft material surface when the hard material surface is moved relative to and in contact with a relatively soft material surface. friction force at the interface. In the examples described herein, at least a portion of the hard surface includes a conditioned surface having a lubricious material encased by, embedded in, precipitated within, conditioned by The conditioned surface surrounds, is transferred to, or is otherwise retained by the conditioned surface. In some examples, the lubricious material is a material that is substantially similar or the same as the relatively softer material. In other words, lubricious materia...

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Abstract

Movable valve apparatus having conditioned lubricating surfaces are described. An example valve includes a valve packing having a graphite packing ring disposed within a bonnet of the fluid valve and a stem or shaft has a conditioned surface to hold a lubricating material. The conditioned surface of the stem or shaft is disposed within the bonnet and moves the lubricating material relative to and in contact with the graphite packing ring during operation of the fluid valve.

Description

technical field [0001] The present application relates generally to a fluid valve, and more particularly to a movable valve device having a conditionally lubricated surface. Background technique [0002] Fluid valves such as rotary valves, linear valves, etc. typically have a fluid flow control member disposed in a fluid flow path and operatively coupled to an actuator, such as a pneumatic actuator, manual actuator, etc. . A valve stem or shaft operatively couples the flow control member to an actuator that moves the flow control member between an open position and a closed position to allow or restrict fluid flow between the inlet and outlet of the valve. flows between. Typically, a valve stem or shaft extends between the flow control member and the actuator through a bonnet coupled to the valve body. [0003] Valve packing or packing assemblies are often used to prevent leakage of process flow to the environment along the valve stem or shaft and through the valve body. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K41/02F16J15/18F16J15/30
CPCF16K51/00F16K41/02Y10T29/49419Y10T29/4941
Inventor M·J·林瑟W·D·赫琴斯
Owner FISHER CONTROLS INT LLC