• November 30. 2021

V-packings, also known as Vee packing seal and Chevron V-packings, or V stack, is a kind of stacked seal. It is combined by a male adapter, a female adapter and a number of intermediate V rings. V-packings are designed to be used in applications such as hydraulic cylinders, fracturing pumps or well downhole. Facing different working condition (temperature, pressure, media), the raw material differ...

• November 01. 2021

Rod seals are the most important seal within any hydraulic sealing system, which are used to prevent leakage of hydraulic fluid to the outside of the sealing system. Rod seals should be paired with an appropriate wiper and gland housing design to ensure correct operation. Rod seals are often the critical factor in ensuring that a hydraulic cylinder operates at peak performance. Leakage throug...

• October 22. 2021

The back up ring, also called anti extrusion ring, is aptly named as they do just that: they back-up an O-ring. The purpose of using the backup ring is to prevent the O-ring from extruding into the sealing gap under the system pressure. The structure of the increased back up ring will bear much higher pressure than using the O-ring alone. The profile shape of the back up ring is usually rectangula...

• October 14. 2021

In the oil and gas industry, the risk and consequence of unplanned downtime is greatest in extreme environments. JST has long been committed to the provision of sealing solutions for the exploration and production of oil and gas. Wellhead is a critical part of oil and gas infrastructure. Its sealing materials need to withstand pressures as high as 15 000 psi and temperatures of 149º C. From d...

• October 11. 2021

P Seal is a static seal comprising a profiled elastomeric sealing element with two anti-extrusion metal rings or stainless steel wire mesh rings. It is used in casing and tubing heads to seal rough casing and production tubing. In operation, the inside diameter (primary sealing face) of P Seal acts on the outside diameter of the casing/tubing running through it. The groove/recess in the ...

• September 29. 2021

API gate valves refer to the valves which are made under the regulations set by the American Petroleum Institute. They are usually widely used in petroleum and industrial processing plants, playing an important role at shutting off the flow. And it is true that the featured and core part of them is called the wedge. In order to meet the various specifications, API gate valves are indeed designed a...

• September 24. 2021

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...

• September 15. 2021

Cryogenic Sealing Solutions provides a powerful sealing mechanism for cryogenic materials such as cryogenic fluids. Sealing at cryogenic temperatures has its own unique set of challenges. JST Seals recently designed and shipped a very urgent LNG cryogenic valve seals for the overseas customer. Its completed working conditions are as follows: Fluid media LNG at temperature: minus 175°C Maximum temp...

• August 27. 2021

Wellhead is a critical part of the oil and gas infrastructure. Seals material and design must withstand pressures as high as 15K psi and temperatures LU (-46℃~121℃), PU (-21℃~121℃), or SX (-18℃~178℃). From material development, seals design, testing, through to production, JST make FS seal and S seal to perform in the toughest situations, delivering reliable high pressure sealing. They combine the...

• August 18. 2021

Hammer Union Seals are used in hammer union-style pipe connections to establish flow lines and prevent leakage. Hammer Unions are made by Weco, FMC, and Kemper Valve among others, and are used in the oil & gas industry, in steel mills, chemical plants, strip mining, and marine dredging. The hammer union seal is exposed to the gases and fluids that flow through the coupling making the choi...