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(I)Combined seals 1.Step seal: The Step seal structure is similar to that of the Glyd ring, and is composed of an O-type rubber seal and a special rectangular or trapezoidal seal filled with polytetrafluoroethylene. Step seals can be divided into hole seals and shaft seals, which only have a one-way sealing effect. Step seals are characterized by low friction, no creeping, and long service life. I...
Are you looking for spring energized face seals? Spring Energized Face Seals are designed for applications with high pressures and temperatures, cryogenic fluids, extreme media and other service conditions which exceed the performance characteristics of O-rings and conventional elastomeric seals. Spring energized PTFE seals use one of three different types of springs to energize the jacket. W...
In a 6A gate valve, the seat seal application is crucial for ensuring tight shutoff, particularly in high-pressure and high-temperature environments, such as in the oil and gas industry. API 6A valves are manufactured following standards for wellhead and Christmas tree equipment, where the gate valve provides on/off control with a straight-through flow. Here’s an overview of key considerations for...
PEEK (polyetheretherketone) and PTFE (polytetrafluoroethylene, commonly known as Teflon) backup rings both play important roles in sealing applications, but they have some significant differences in material properties and application benefits. Here are their differences and their respective advantages: 1. Differences in material properties PEEK backup rings: Strength and rigidity: PEEK has high m...
Sealing for API 6D ball valve and LNG at cryogenic temperatures has its own unique set of challenges. JST has a wide range of solutions for cryogenic sealing applications. The range includes valve stem seals and valve seat seals. Compounds and designs could vary as per specific applications. The material mainly includes polymer jacket (virgin PTFE, filled PTFE, TFM, PCTFE, UHMW-PE, PEEK, etc.) and...
The environments in the oil and gas industry are extremely harsh. High pressures, temperatures, and corrosive substances pose significant challenges to equipment reliability. Seals are essential to prevent the leakage of oil, gas, and other fluids, ensuring safe and efficient operations. A seal stack is a combination of multiple sealing elements designed to provide a reliable barrier. It cons...
SPGW hydraulic seals are designed for heavy-duty applications, often used in hydraulic cylinders, offering a combination of wear resistance, low friction, and durability. Here are some key features of SPGW hydraulic seals: 1. Material: Bronze-filled PTFE (Polytetrafluoroethylene): Provides excellent resistance to wear, extrusion, and deformation. NBR/Nylon: Often combined with PTFE, these provide ...
Sealing at cryogenic temperatures has its own unique set of challenges. To provide superior protection against leakage in cryogenic valves for LNG, cryogenic seals should be designed with the following properties in mind: Jacket material that tolerates thermal cycling A spring energizer to compensate for shrinkage Anti-extrusion lip geometry JST has a wide range of solutions for cryogenic sealing ...
In the oil and gas industry, the risk and consequences of unplanned downtime are greatest in extreme environments. JST understands the demands you face every day and offers a range of fully tested and certified wellhead sealing products to reliably meet your business and technical challenges. You can trust our FS seals and S seals as well as our T seals and locked T seals to perform in the most ch...
Backup rings play a vital role in preserving the integrity of seals within pressurized aerospace hydraulic systems, minimizing leakage, and extending the lifespan of the components they protect. What are Backup Rings? The back up ring material could be PEEK, modified PTFE. PEEK™ back-up rings are designed to prevent extrusion in elastomer O-ring sealing systems. These rings are designed to close o...
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