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Secondary seal pack-off materials, used primarily in oilfield wellheads to prevent leakage between casing strings, are typically high-performance elastomers or specialized metal-to-metal seals. Common materials include Nitrile (NBR), Hydrogenated Nitrile (HNBR), and Viton (FKM), often reinforced with metal mesh or fabric to handle pressures up to 15,000 psi. These seals operate in harsh conditions (
to
) and resist chemical exposure.
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Web results
China Wellhead Secondary Pack Off Seal Manufacturer
JST-Seals
https://www.jst-seals.com › wellhead-secondary-pack-off...
JST-Seals
https://www.jst-seals.com › wellhead-secondary-pack-off...
Wellhead secondary pack off seals used to seal the hanger to the wellhead. The seal assembly may include a seal element and a lockdown member.Read more
People also ask
What is the NEC code for seal offs?
Generally speaking, seal offs must be applied to explosion proof systems every 18 inches. According to NEC 501.15a[3], seal offs must be applied in each nipple or conduit connection to an explosion proof enclosure.Nov 13, 2018
When to Use Seal Offs and Barriers for Explosion Proof Equipment
Larson Electronics LLC
https://www.larsonelectronics.com › blog › 2018/11/13
Larson Electronics LLC
https://www.larsonelectronics.com › blog › 2018/11/13
What common materials are used for seals and packing and why?
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And provide strong sealing properties some grades can also be used in the medical. And foodMoreAnd provide strong sealing properties some grades can also be used in the medical. And food industries. These are only a few of the materials. Used for manufacturing seals.
A Guide to Common Seal Materials - YouTube
YouTube
https://www.youtube.com · Totally Seals
YouTube
https://www.youtube.com · Totally Seals
What is seal packaging?
Packaging seals are an essential part of any product's packaging, designed to maintain quality and ensure protection. They serve multiple purposes, such as keeping contents fresh, preventing tampering, and safeguarding against damage during transport.Jan 20, 2025
8 Types of Packaging Seals: Heat, Ultrasonic, Zipper & More Explained
food packaging manufacturer
https://toptopmfg.com › blog › types-of-packaging-seals
food packaging manufacturer
https://toptopmfg.com › blog › types-of-packaging-seals
Web results
Wellhead PE Seals & Secondary Seals
GB Industry
https://www.gbindustry.com › products › primary-and-se...
GB Industry
https://www.gbindustry.com › products › primary-and-se...
Pack-off or secondary seals installed in the bottom of spool with corresponding preps; Secondary seals protect connection from wellbore contamination ...Read more
Secondary Packoff Seals for API 6A Wellhead Casing Hanger
qihangwellhead.com
http://www.qihangwellhead.com › products › Secondary...
qihangwellhead.com
http://www.qihangwellhead.com › products › Secondary...
Secondary Seal Assemblies or Packoffs are installed in the lower seal area of the Casing Spool or Tubing Head. They are utilized to offer redundant well ...Read more
Elastomeric wellhead secondary pack off seal
JST-Seals
https://www.jst-seals.com › elastomeric-wellhead-seconda...
JST-Seals
https://www.jst-seals.com › elastomeric-wellhead-seconda...
Pack off seal is a sliding seal structure, including a cylindrical seal body, which includes an upper end face and a lower end face.Read more
Secondary Packing
Web Nordeste
https://webnordeste.com.br › onshore-products › wellheads
Web Nordeste
https://webnordeste.com.br › onshore-products › wellheads
DOUBLE PACK-OFF FLANGE. The double pack-off flange provides an auxiliary seal and a means to test the casing seal and the primary annulus seal below the flange.Read more
Sealing Products Guide
MFP SEALS
https://www.mfpseals.com › mfp_file_downloads
MFP SEALS
https://www.mfpseals.com › mfp_file_downloads
PDF
FS Casing seals replace traditional plastic packing seal arrangements and are used in applications where there are large clearances between wellhead components.Read more
32 pages
Sealing Devices and Materials
cedengineering.ca
https://www.cedengineering.ca › userfiles › M02-...
cedengineering.ca
https://www.cedengineering.ca › userfiles › M02-...
PDF
SEALING DEVICES AND MATERIALS. Sealing devices and materials prevent leakage, and contain pressure or exclude contamination between components.Read more
25 pages
Cooper Crouse Hinds Chico™ SpeedSeal Compound
YouTube · Summit Electric Supply
125.8K+ views · 11 years ago
YouTube · Summit Electric Supply
125.8K+ views · 11 years ago
A new method of sealing that creates a more reliable installation while also saving 80% of the labor required to properly air and pour a conventional seal.
COMPRESSION PACKING Technical Manual 4th Edition
Fluid Sealing Association
https://www.fluidsealing.com › uploads › Compr...
Fluid Sealing Association
https://www.fluidsealing.com › uploads › Compr...
PDF
The two packing rings on the gland side act as a secondary seal to minimize leakage from the flushing medium. In the arrangement in example C the lantern ...Read more
127 pages
Wellhead secondary pack off seal
wpce.su
https://wpce.su › product › wellhea...
wpce.su
https://wpce.su › product › wellhea...
Wellhead secondary pack off seals designed by JST can withstand the high pressure of 15000 psi and the temperature range from – 29 ℃ to 121 ℃. Advantages:.Read more
