Hard seal front seat device and high temperature and high pressure floating ball valve comprising same

By combining the hard-seal front valve seat device with the medium pressure and the disc spring tension, line contact sealing under high temperature and high pressure conditions is achieved, solving the sealing failure problem of hard-seal floating ball valves and improving sealing reliability and durability.

CN122148776APending Publication Date: 2026-06-05SHANGHAI NEWKING VALVE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI NEWKING VALVE CO LTD
Filing Date
2025-08-14
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Under existing high temperature and high pressure conditions, the front seat and valve body of a hard-seal floating ball valve cannot achieve an effective seal. Traditional soft seals are prone to powdering or carbonization at high temperatures, leading to seal failure.

Method used

The device employs a hard-seal front valve seat assembly, which utilizes the medium pressure to form a line contact seal. A disc spring provides tension, and the contact part and the surface of the front valve seat are coated with hard alloy to achieve a self-tightening seal. The hard alloy coating also improves the temperature and pressure resistance.

Benefits of technology

It achieves effective sealing under high temperature and high pressure conditions, avoiding the wear and leakage problems of traditional soft seals, and improving the reliability and durability of the seal.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122148776A_ABST
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Abstract

The application discloses a hard-seal front valve seat device and a high-temperature and high-pressure floating ball valve comprising the same. The hard-seal front valve seat device comprises a front valve seat, a valve ball, a valve body and a valve cover. The valve body is connected with the valve cover and forms a valve cavity. The valve ball is located in the valve cavity. The front valve seat is arranged between the valve body and the valve ball. The inner wall surface of the valve body has an outwardly protruding contact part. One end of the contact part towards the front valve seat is used for mutual contact with the front valve seat to form a line contact seal. The high-temperature and high-pressure floating ball valve comprises the hard-seal front valve seat device. The front valve seat and the contact part of the valve body are in mutual contact to form a line contact seal. The line contact seal can improve the pressing force, break through the limitation of easy wear and leakage of plane sealing, effectively avoid the problem that the traditional soft sealing element depends on the pre-tightening force to cause high-temperature blocking, and realize effective sealing under high-temperature and high-pressure working conditions.
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