• February 26. 2024

JST designs and manufactures spring energized lip seals for ball valve. In this article, we will introduce some lip seals used for different sealing application in ball valve. Lip seal type FVR is used for ball valve seat sealing. As shown in picture Fig-1, the FVR lip seal contains four parts. 1- T ring (material: carbon filled PTFE), 2- U ring (material: carbon filled PTFE), 3-Spring (material: ...

• December 23. 2024

Heat treatment has become a key step in the manufacturing of sealing springs, making significant contributions to improving their efficiency, durability, and service life. This treatment involves strategic applications of heat and cooling methods, intentionally altering the physical and chemical properties of the material. It is mainly applied in the metallurgical field and also greatly beneficial...

• June 16. 2025

EVZ is commonly used in high-pressure mud pumps and fracturing pumps, namely Packings, the high-speed reciprocating dynamic seals. Its main function is to prevent plungers from leakage in high-speed reciprocating. Some special working conditions are taken into consideration when designing its structure and material, which make it apply to fracturing fluid, mud so on mediums. Technical Requirements...