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S seal and O ring both can be used for wellhead casing but they have different functions and suitable for different working conditions. O ring is a static seal. It is suitable for lower pressure, small groove gap and smooth groove surface. O ring is usually combined with back up ring. But in hostile environment, such as H2S, high pressure, high and lower temperature, rough groove surface, o ring w...
For wellhead casing head, tubing hanger, JST provides elastomer seals including FS seal, S seal, P seal, O ring, MEC metal end-cap seal and lock screw packing. These seals are essential elements in the integrity and functionality of wellhead equipment. We developed HNBR, FKM, AFLAS and other material accordingly which have high pressure resistance, good sealing characteristics. 1. Materials tested...
RGD is known as Rapid Gas Decompression, AED is known as Anti-Explosive Decompression. RGD (Rapid Gas Decompression) or AED (Anti-Explosive Decompression) is a failure mechanism of O-rings and elastomer seals which is caused by the rapid reduction in pressure of the gaseous medium. When the pressure is released, the gas penetrating into the elastomer seal will expand violently, which in turn will ...
There are many reasons for seal failure, including long-term storage in less than ideal conditions. Rubber may crack, harden, soften or degrade, making it unsafe for its intended use. Most seals have a widely accepted shelf life, which helps manufacturers prevent catastrophic failures caused by old seals. Maintaining the seal throughout its intended shelf life requires providing a storage environm...
Spring lip seals have been used for many years. Spring lip seals are used in a manner similar to conventional elastomer seals, such as o-rings. Elastomer seals often fail due to conditions that often occur in their operating environment, such as chemical corrosion, extreme high or low temperatures, extrusion, friction, or compression set. However, spring lip seals have different structures and do ...
If the sealing system on your equipment fails prematurely or cannot work normally, you may immediately check the following points: Whether the seal is defective; Whether the sealing material can not withstand the temperature or pressure requirements of the application; Whether the size is appropriate or the extrusion level is verified; However, the inspection of mating metal components is easy to ...
Grooves and Glands The physical space occupied by the seal is usually referred to as a groove, but it can also be referred to as a gland. In most cases, it’s a rectangular groove cut into the hardware whether it be on a piston, in the housing for a rod, or in the face of two mating surfaces. Compared to O Ring and elastomer seals, PTFE and polymer seals are critically dependent on hardware conditi...
In the dynamic world of sealing technology, keeping up with progress is crucial for achieving optimal performance. Although elastomeric seals have been the main product in various industries, the emergence of spring energized seals heralds new opportunities. This article utilizes JST Concepts' profound professional knowledge to explore convincing reasons and benefits for considering this critical ...
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