• August 11. 2023

Lockdown Screw packing seal is usually made of an HBNR compression packing element with molded metal end caps. But JST has developed a lockdown screw packing seal which is made of one filled PTFE and two cooper end caps. It is the sealing between wellhead members in a wellhead, including a seal element and a lockdown member. The seal is attachable to either one of the wellhead members by coup...

• July 17. 2023

JST new design of Lockdown screw packing is made from one PTFE ring and two copper rings. PTFE ring is able to lower the holding force and friction, thus lower the torque. Meanwhile, two copper rings can better protect the LDS body not to be damaged during the twisting and rotating process. JST has conducted the test to qualify the PR2 performance of 1.51 inch LDS packing seal at L-X -46℃~177℃ ( -...

• August 03. 2022

S Seals is made from elastomer and two metal garter spring. The metal garter spring is incorporated into the elastomeric seal element. The one-piece S seal eliminates the installation issues that may occur when using multi-component seals. It can be stretched into place without splitting or damaging the non-extrusion components. S seal can be manufactured to accommodate almost any gland size, incl...

• July 22. 2022

JST 3" External S seal passed PR2 test, as well as 13” S seal. JST S seal use material HNBR85+316SS, BV witnessed HNBR S seal at working condition -29°C  to +121°C, 10000PSi, product design refer to API 6A -annex F. The material HNBR(H3385) meet API immersion test, RGD test. The Inspector also applied following activities: 1: Reviewed the test certificate of raw material HNBR ( H3385), the Re...

• July 06. 2022

JST 3" External S seal use material HNBR85+316SS, we verify the S seal at working condition -29°C  to +121°C, 10000PSi, product design refer to API 6A -annex F. Below are the external S seal main test contents: • 1-Visual and dimension inspection for the seals and test fixture before the testing • 2-Witness the seals assembling progress • 3-Witness the sealing test for the O-ring from C port ...

• June 01. 2022

JST Seals can provide vee packing manufactured from its range of high performance elastomers, PTFE and PEEK. Typical applications include mud pump packing, where the seal encounters high pressure and grinding media containing various solids, oil and water. 1. Test purpose The objective of this test procedure is to evaluate the quality of  JST non elastic seal, V-Packing seal stack design as p...

• April 15. 2022

Packer elements are rubber seals that operate under specific down-hole conditions and provide an elastomeric seal for either short-term or long-term completion. Packer elements are used between sections of oil and gas production tubing to prevent fluids and pressure from leaking through the joints. This protects the casing, production tubing, liner and wellbore wall above and below the producing z...

• March 29. 2022

Lockdown Screw Seals, also called lockdown screw packing is made from elastomer and two SS metal end caps. It provides a dependable seal in multiple pressure ranges and service environments. JST has conducted the PR2 test to qualify the existing elastomer/metal lockdown screw packing to 20,000 psi at a temperature range of -50 to 350ºF. This test consisted of a 20,000 psi nitrogen gas proof test a...

• March 03. 2022

JST Seals produces various sizes of FS seal and P seal, from 4.5" to 36". FS seal: FS seal is suitable for 15000Psi, LU temperature rating, chemicals with H2S/CO2. Below drawings show our standard FS seal groove dimension and product drawing. 26” FS seal 30” FS seal P seal: Regarding P seal, JST has two different designs. One design is rubber reinforced with two 316ss wire mesh back up rings, anot...

• February 22. 2022

Hammer Union Seals are commonly applied in applications like the Chemical Processing, Offshore Drilling, Petrochemical, and Water and Gas industries. It helps prevent leakage in hammer union pipe connections. Generally, materials include Nitrile (NBR), FKM, HNBR. In addition to the standard elastomer materials, anti-extrusion rings can be reinforced in Stainless Steel or Brass. It is also known as...