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Balanced double seated globe valve with flexible plug

A ball valve, plug seat technology, applied in the direction of lift valve, valve device, valve details, etc., can solve the problems of seal failure, elastic material can not bear, difficult to provide and so on

Active Publication Date: 2017-05-31
SPX FLOW INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, elastic materials cannot withstand some of these relatively extreme conditions
Additionally, large globe valves such as those having flow control holes or ports greater than 6 inches in diameter are known to suffer from seal failure
[0005] Unfortunately, it is difficult to provide a seal that functions through a range of pressures and temperatures, is compatible with a variety of fluids, allows the valve to open and close with minimal effort, and is abrasion resistant enough to withstand repeated opening and closing operations
While these problems have been well known in the past, conventional valves still suffer from one or more of these disadvantages

Method used

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  • Balanced double seated globe valve with flexible plug
  • Balanced double seated globe valve with flexible plug
  • Balanced double seated globe valve with flexible plug

Examples

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Embodiment Construction

[0018] The present invention provides, in some embodiments, a flexible plug for use in a balanced double-seat ball valve trim and a ball valve having a flexible plug. Globe valves are configured to provide control over the flow of fluid therethrough over a relatively wide range of pressures, temperatures, and chemical activities of the fluid. In a specific embodiment, these properties are gradually infused into the ball valve by means of a flexible metal plug made entirely of metal and / or comprising no elastic or polymeric components. The ball valve is configured to provide a fluid-tight seal when positioned in a closed configuration due to the double seat having a flexible portion disposed therebetween. In addition to flexible, all-metal construction, embodiments include some or all of the following features: pressure balance for reduced actuator thrust; abnormal seat leakage tightness (category five); capable of continuous high temperature operation; Flexible area of ​​the ...

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PUM

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Abstract

A valve plug includes a cylinder, a first plug seat, a second plug seat, and a convoluted portion. The cylinder has a first and second end. The first plug seat is disposed at the first end. The second plug seat is disposed proximal to the second end. The convoluted portion is disposed between the first seat and the second seat. The convoluted portion provides flexibility for the cylinder to flex between the first plug seat and the second plug seat.

Description

[0001] Cross References to Prior Applications [0002] This application claims the benefit of US Patent Application No. 14 / 509,671 filed October 8, 2014, which is hereby incorporated by reference for all purposes as if fully set forth herein. technical field [0003] The present invention generally relates to valves. More specifically, the present invention relates to ball valves. Background technique [0004] As is well known, valves are important devices for regulating the flow of fluids in pipes or other such conduits. As is known to those skilled in the art, a valve regulates the rate of fluid flow when the position of the valve plug within the valve is changed by an actuator. Two important characteristics of a valve, such as a globe valve, are that it is often desirable to be able to completely block flowing fluid in the closed position, and to be able to withstand the temperature and chemical influences of the fluid flowing therethrough. In order to properly stop fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/44F16K3/26F16K51/00
CPCF16K47/08F16K1/427F16K39/022F16K1/443F16K25/005Y10T137/86928Y10T137/86759F16K27/02F16K1/36F16K1/42F16K1/44F16K25/02F16K31/508
Inventor 大卫·C·里斯陶内森·T·汉森
Owner SPX FLOW INC