• 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-Spri...

• July 31. 2025

In LNG terminals, liquid nitrogen systems, and cryogenic pipelines (-196°C), standard elastomer seals fail catastrophically—brittle fractures, shrinkage-induced leaks, and cold flow compromise safety. As a leading cryogenic seal manufacturer, we engineer PTFE and PEEK ball valve seat seals specifically for sub-zero environments. Our materials resist thermal shock, maintain elasticity at -196°C, an...

• December 30. 2025

When it comes to unidirection Radial seal for the Ball valve seat, our customer would always prefer to choose JST style “BVR”, but why is that?   The answer lies in its optimized sealing geometry and pressure-activated design. The BVR series is made of a canted level spring and a polymer jacket, which is mainly used as a stem seal. Under pressure, the seal lip is energized and tig...