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Ball valve seat with triple seal

A valve seat and ball valve technology, which is applied in the field of ball valve seats with triple seals, can solve the problems of wear of elastomer sealing rings and serious extrusion problems.

Inactive Publication Date: 2018-12-21
GUIDE VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Extrusion problems become more serious under high pressure working conditions
Additionally, elastomeric seals are susceptible to wear from particulate matter that may be present in some fluids

Method used

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  • Ball valve seat with triple seal
  • Ball valve seat with triple seal
  • Ball valve seat with triple seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The invention is a ball valve seat with improved durability, resilience and sealing performance. The invention also provides a ball valve seat that reduces the amount of torque required to operate the ball valve.

[0018] figure 1 A typical ball valve inserted into the tube (10) is shown. The ball (20) defining the hole (30) is located between the two valve seats (40). When the valve is in the open position, fluid flows through the hole (30). When the ball (20) rotates to the closed position, the valve seat (40) covers the hole (30) to prevent liquid leakage.

[0019] figure 2 with image 3 The valve seat (40) of the present invention is shown. The valve seat (40) includes two end points. The improved first end (120) is used to connect or insert the ball valve (20) into the pipe (not shown). The valve seat also defines a valve seat hole (130), thereby providing an inner surface (not shown) of the valve seat in contact with fluid flowing through the pipeline.

[0020] Th...

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PUM

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Abstract

The present invention pertains to a seat for a ball valve, the seat defining an axial bore along an inside surface of the seat. The seat inside surface is in contact with a fluid. At one end of the seat inside surface, the seat comprises a contact portion for contacting a ball. The contact portion comprises a metal-to-metal sealing surface, a thermoplastic seal and an elastomeric seal. The metal-to-metal sealing surface is disposed proximally to the inside surface, the elastomeric seal is disposed distally to the inside surface, and the thermoplastic seal is disposed therebetween, wherein themetal- to-metal sealing surface seals against the ball valve to seal fluid away from the thermoplastic and elastomeric seals.

Description

Background technique [0001] The valve seat of the ball valve is well known in the prior art. The ball and valve seat are made of specific materials, and their type depends on many factors such as temperature, pressure and the type of fluid flowing through the ball valve. For example, fluids containing a large amount of particulate matter require anti-wear ball and valve seat materials. [0002] As we all know, the valve seat also includes additional sealing elements to improve the valve's closing performance and prevent leakage. Common sealing elements include thermoplastic sealing rings and elastomer sealing rings. The choice of sealing element depends on factors such as temperature, fluid type and pressure. [0003] Elastomer sealing rings are superior to thermoplastic sealing rings and have certain advantages in the following aspects: For example, elastomer sealing rings are easier to compress, so compared with thermoplastic materials such as resin, the working pressure requir...

Claims

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Application Information

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IPC IPC(8): F16K5/06F16K5/08F16K5/20
CPCF16K5/0673F16K5/20F16K25/005F16K25/04
Inventor 查尔斯·洛西塞罗
Owner GUIDE VALVE