• June 29. 2021

Finite Element Analysis (FEA) is extremely important in critical seal design. JST conducted PR2 tests as per API6A, as well as FEA to its FS seal, S seal, valve stem packing seal, valve face seal. So why FEA is important and necessary? FEA capabilities make possible: 1. Seal failure prediction from cracks, leaks, or deformation, allowing a better-designed product or reverse-engineering of existing...

• July 09. 2021

I Test Purpose To verify the pressure cycling performance of the gate valve stem packing seals at 15000PSI, -50~350℉. II Product and fixture 1. Product structure The seals include 1 of A ring, 1 of spring, 1 of U ring, 1 of B ring, and 1 of C ring, see fig. 1: 2. Material : 1-PTFE+13% Carbon fiber+2%Graphite (PC007) 2-PTFE+13% Carbon fiber+2%Graphite (PC007) 3-Elgiloy Golden 4-PTFE+13% Carbon fibe...

• 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...