Unlock instant, AI-driven research and patent intelligence for your innovation.

Valve seals

A technology for seals and valves, which is applied in the direction of lift valves, valve devices, engine components, etc., and can solve the problem that metal seals cannot achieve tight shut-off.

Active Publication Date: 2013-04-17
FISHER CONTROLS INT LLC
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Typically, however, metal seals cannot achieve tight shutoff (such as ANSI Class 4 shutoff)
Valves with three-stage offset designs can achieve tight shutoff in the face of high temperatures by using seals containing graphite laminates, but three-stage offset valves require expensive, large actuators to drive the valves used in Flow control components (such as discs)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Valve seals
  • Valve seals
  • Valve seals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] Although the following exemplary seals are described in connection with butterfly valves, the exemplary seals can also be used in any other rotary valves (e.g. ball valves, Vee-Ball TM rotary control valve, etc.). In industrial processes, such as oil and gas distribution systems and chemical process plants, valves, such as butterfly valves, ball valves, etc., are commonly used to control fluids. Typically, the shutoff capability of a valve affects the operational performance of an industrial process. Typically, valves without soft (eg, rubber) seals cannot achieve tight shutoff (eg, ANSI Class 4 shutoff). Typically, however, process conditions dictate the type of seal that can be used in the valve. Examples include polytetrafluoroethylene (PFTE) seals, which may enable valves to achieve a tight shutoff, which may burn and / or sublimate if exposed to temperatures above 450 degrees Fahrenheit. Therefore, PFTE seals are generally not suitable for high temperature appli...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Seals for use in valves are described. An example seal (102) includes a ring-shaped cartridge (200). The cartridge has a first portion (206) and a second portion (208). The first and second portions hold a sealing portion (210), and the first and second portions have respective first (310) and second (312) curved surfaces adjacent to a sealing surface of the sealing portion. Radii of curvature of the curved surfaces enable an initial point of contact between a flow control member (110) and the cartridge to be on the sealing surface when the flow control member moves to a closed position.

Description

technical field [0001] The present disclosure relates generally to valves, and in particular to seals used in valves. Background technique [0002] Valves are commonly used to control fluids in industrial processes. Process conditions such as temperature and pressure often dictate the type of seal that can be used in a valve. In high temperature conditions, metallic seals are often used because soft, non-metallic seals such as Teflon seals may sublime or burn when exposed to temperatures in excess of 450 degrees Fahrenheit. Typically, however, metal seals cannot achieve tight shutoff (eg, ANSI Class 4 shutoff). Valves with three-stage offset designs can achieve tight shutoff in the face of high temperatures by using seals containing graphite laminates, but three-stage offset valves require expensive, large actuators to drive the valves used in flow control components (such as discs). Contents of the invention [0003] An exemplary seal for use in a valve includes an an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/34F16K1/226
CPCF16K1/2266
Inventor W·J·赫尔弗
Owner FISHER CONTROLS INT LLC