• 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...

• January 21. 2022

Guangzhou JST Seals has been supplying stem packing seal and seat seal for 6A gate valve for over 20 years. To give an unequivocal assurance of quality, performance and durability, our seal has been tested and witnessed by the third party DNV. The seal materials are PEEK+PTFE+Elgiloy Spring. Our seals are installed on Douson 3-1/16“ 15M Gate valve and 2-1/16'' 10M Gate valve and 1-13/16'' 15M Gate...

• December 06. 2022

The seals made from carbon graphite materials have the common advantages of both metal and non-metallic materials. Its material characteristics includes excellent self lubrication, chemical stability, high thermal conductivity, high temperature resistance, corrosion resistance, high wear resistance, low expansion and easy maching. These characteristics of carbon graphite are necessary for pure wat...

• March 23. 2023

FEA Simulation Finite element analysis (FEA) is a computer-based technique used to calculate the performance of components in practical applications. This advanced technology can determine how components are affected by extreme temperatures and pressures, specific stresses, and aggressive chemical environments. Proficient use of FEA simulations enables accurate modeling by predicting behavior, eli...

• May 25. 2023

Sour gases containing hydrogen sulfide/sulfide (H2S) can have a very adverse effect on elastomers. The elasticity that is not resistant to corrosion becomes hard and brittle, losing elasticity and sealing ability, ultimately leading to sealing failure. JST has developed various sour gas resistant elastomer materials for the oil, natural gas, and petrochemical processing industries with the third-p...

• October 17. 2023

SLS sealing packing is a high-quality stem packing primarily used in FLS and FLS-R style gate valves. This seal is spring energized and is applied to the top of the valve bonnet around the valve stem.  On the hydraulic valve, additional SLS packing is used at the bottom of the valve with the lower balance valve stem. Materials and Components The high-quality materials used by Heshka Oil in SL...

• December 07. 2023

In the oil and gas field, seal will be exposed to high temperatures and pressure ranges means that standard polymer seals are unable to meet the customer requirements. JST seal materials including: Perfluoroelastomers (FFKM) Fluoroelastomers (FKM) HNBR Aflas PTFE PEEK UPE Elastomer and Polymer materials for the Oil and Gas industry Applications: 6A gate valve 6D ball valve Wellhead casing hanger o...