• March 06. 2025

Valve stem packing seals are used in valves to provide a seal around the valve stem (the shaft that controls the valve's opening and closing). They are essential for preventing fluid or gas leakage from the valve, ensuring that pressure and contaminants don't escape. The application of stem packing seals includes: Pressure Control: They help maintain pressure within the valve, preventing leakage a...

• September 23. 2025

JST Seals possesses comprehensive in-house capabilities to perform PR2 tests under stringent conditions, ensuring the reliability and performance of our sealing products. Our facility is equipped with advanced testing apparatus, including material abrasion testers, high- and low-temperature PR2/PR2F test systems, ultra-low temperature equipment using liquid nitrogen (-320.8°F / -196°C), and a rang...