How does EST valve stem packing ensure effective sealing?

 The valve stem packing assembly refers to the sealing components used to prevent leaks from the stem of a valve. Valve stem packing plays a vital role in ensuring a long valve life.


JST EST valve stem packing has good sealing performance under working pressure and a certain temperature range, and can automatically improve the sealing performance with the increase of pressure, which is suitable for type FLS and FLS-R gate valves. This seal has passed the PR2 tests. They are built to meet the American Petroleum Institute’s high standards for design, materials, function and performance.


Advantages:

1. The sealing ring has strong anti-corrosion ability, is not easy to aging.

2. Has long working life and good wear resistance, and can be automatically compensated to a certain extent after wear.


Material:

PEEK, Elgiloy/SS steel, Filled PTFE


https://www.jst-seals.com/valve-stem-packing-for-fls-r-gate-valves_p85.html

评论

发表评论

此博客中的热门博文

What is the difference and advantage between rubber seal and metal seal?

Rubber seals   and   metal seals   are two common types of sealing components used in various applications across industries. Each type of seal has its own advantages and differences that make them suitable for different purposes. Let’s explore the differences and advantages of rubber seals and metal seals: Rubber Seals: Advantages: Flexibility: Rubber seals are flexible and can conform to irregular surfaces, making them effective in sealing applications where there may be slight imperfections or movement between mating surfaces. Sealing Properties: Rubber seals offer excellent sealing properties, providing effective barriers against liquids, gases, dust, and other contaminants. They can create a tight seal to prevent leakage and maintain the integrity of the enclosed environment. Vibration Dampening: Rubber seals have inherent vibration dampening properties, making them suitable for applications where shock absorption or noise reduction is required. Differences: Material...
阅读全文

Choosing the Right Spring and Seal Jacket Materials for High-Temperature and Corrosive Fluid Applications

  Spring energized seals   have been widely used in harsh working conditions such as extreme operating temperatures, high pressure, corrosive chemical media, low friction, and high operating speeds. The main materials for seal Jackets aremodified PTFE and other high-performance plastics. PTFE is a sealing material with superior chemical resistance and good heat resistance compared to perfluorinated rubber. It can be applied to the vast majority of chemical fluid solvents,  hydraulic oils, and lubricants. Its compression set is very small, so it can provide long-term sealing performance. Spring energized seals use various special springs to overcome the elastic problems of PTFE or other high-performance Plastics. JST has developed sealing components that can replace the vast majority of applications in static  or dynamic (reciprocating or rotating). The temperature range can be from -196℃to 300℃,  the pressure can range from vacuum to ultra-high pressure of ...
阅读全文

What are the groove types of spring energized seals?

图片
  Open groove The open groove structure is the most recommended groove form. The open groove structure is a separate two-piece design. The  lip seal  does not need to be stretched or twisted for assembly.(Fig:4-1) Typical features: The lip seal does not need to be stretched or twisted for assembly. Lip seal can be disassembled and assembled repeatedly without causing damage to it. Two-piece structure groove type may increase manufacturing costs. Stepped groove The stepped groove is a one-piece step design. The step is to keep the sealing ring in the groove. The height of the step is very small and no installation tools are required. The lip seal can be easily pushed into the groove. For  piston sealing , Stepped groove is a good structure. Stepped grooves are not a good choice when there is back pressure. (Fig 4-2) Closed groove The closed groove is a one-piece integral design and is not recommended. It is only suitable for certain seal diameters, which requires stre...
阅读全文