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Compound power valve seal assemblies for high temperature control valves

A composite sealing and composite sealing ring technology, which is applied in the direction of engine sealing, engine components, lift valves, etc., can solve the problems of seal and/or control component failure, excessive friction, wear, etc., achieve excellent sealing performance, minimize friction effect

Active Publication Date: 2018-09-18
FISHER CONTROLS INT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Monolithic graphite material lacks softness compared to softer rubber or plastic flexible materials used in cryogenic environments, resulting in more severe shut-off leakage
Additionally, graphite seals have a relatively high coefficient of friction, which causes excessive friction and wear as the valve plug moves
This excessive friction and wear causes degradation and premature failure of seals and / or control elements

Method used

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  • Compound power valve seal assemblies for high temperature control valves
  • Compound power valve seal assemblies for high temperature control valves
  • Compound power valve seal assemblies for high temperature control valves

Examples

Experimental program
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Embodiment Construction

[0014] For the purposes of the following description, terms such as inward, outward, radially inward or radially outward are used to refer to a relative position with respect to the central axis A of the valve stem. Likewise, terms such as up, down, upward or downward are used to indicate relative orientation when the control valve is positioned as shown.

[0015] Referring now to the accompanying drawings, figure 1 A sliding stem control valve 10 is shown assembled in accordance with the teachings of the disclosed examples and having a valve body 12 , a fluid inlet 14 , a fluid outlet 16 , and a passage 18 connecting the fluid inlet 14 and the fluid outlet 16 . Although in figure 1 The control valve shown in FIG. 1 is a sliding stem valve, but the teachings of the present invention are also applicable to other types of control valves, such as rotary slide valves, ball valves, globe valves, and the like. A control member, such as a valve plug 20, is slidably mounted in the v...

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PUM

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Abstract

A sliding stem control valve includes a valve body, a seat ring positioned between the valve body and a valve plug slidably mounted in the valve body, the valve plug and valve seat cooperating to control fluid flow through the control valve. The composite seal assembly is located between the valve plug and the valve seat, and the composite seal assembly includes a composite seal ring located between the first support ring and the second support ring. The biasing element is close to the second supporting ring, and the retaining ring is close to the biasing element, thereby keeping the biasing element close to the second supporting ring.

Description

technical field [0001] The present invention relates to process control valves, such as sliding stem valves, and more particularly to sliding stem control valves having compound power valve seal assemblies for high temperature operation. Background technique [0002] Process control valves are used in systems or processes where regulation or control of the flow of a process fluid is required. Such control valves may be configured as sliding stem valves, rotary valves, ball valves, and the like. By setting the position of the control element, such as the valve plug, relative to the valve seat, the fluid flow through the control valve can be precisely set. The valve plug generally slides or moves within the valve body relative to the valve seat. In some control valves, a valve box may be included in which the valve plug slides. Because the valve plug slides in the valve body, it is important to prevent fluid flow between the valve plug and the valve body (or valve box). At...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/32F16K1/46F16K51/00
CPCF16J9/28F16J15/56F16K3/243F16K3/267F16K3/30
Inventor T·D·格雷博
Owner FISHER CONTROLS INT LLC