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Seals Eastern, Inc.
Rapid Gas Decompression Resistant
Seals, Gaskets, and O-rings

for high-pressure gas mixtures including
carbon dioxide, hydrogen sulfide,
and methane.

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Explosive decompression resistant high pressure seals and o-rings for the oil and gas industry When your customer invests in a high pressure gas re-injection project, the last thing you want to shutdown their multi-million dollar investment is faulty seals. An unexpected lubricant or the introduction of corrosion inhibitors in the gas stream is all ito-rings, seals, oring resistant to explosive decompression for compressors. Shown is a Dresser-Rand compressor. takes to destroy a poorly formulated sealing compound. Likewise, an unexpected change  in the gas composition, such as excessive carbon dioxide or hydrogen sulfide, sour gas, can cause dangerous problems. Seals Eastern formulates its high pressure seals for assurance against aggressive chemicals and gases while maintaining the ultimate mechanical properties in the seals.

Rapid gas decompression (RGD) in high-pressure applications can be a recipe for High pressure service seals, o-ring, orings for turbines seal failure. In fact, elastomers have a predictable swelling response in high-pressure gases such as CNG (compressed natural gas), methane, carbon dioxide, and hydrogen sulfide (sour gas). The destructive consequences of this swelling is not so much during the absorption of the gas but when the system pressure is suddenly relieved. In the phenomena of explosive decompression ("ED"), the gas absorbed by the polymer expands rapidly within the polymer upon the release ofCaterpillar Solar gas turbine compressor requiring high pressure seals and o-rings. ambient pressure. The consequences to a seal can be catastrophic failure. Such failure can occur in gas compressors, down-hole applications, and other situations where  high pressure is commonly encountered. Since the 1980s, Seals Eastern has supplied rapid gas decompression (RGD) resistant seals to major manufacturers of turbine driven compressors, gas re-injection equipment, pumps, and other fabricators who must mitigate the effects of high-pressure gases in their equipment.

Technical Paper Downloads on High Pressure Sealing
Sealing High Pressures under Sour Conditions
The Hidden Cause of Seal Failure
Elastomers in the Hot Sour Gas Environment

Rapid Gas Decompression Resistant Compounds by Seals Eastern
ASTM 
D1418
Compound
No.
Shore-A
Hardness
Description
EPDM 7204 90 Y267-Type EPDM for geothermal steam service. Ultra-Low compression set. ED resistant.
FKM 7148 95 ED resistant Fluorocarbon formulation 
FEPM 7182D 80 Formulated AFLAS high-temperature "sour" oil & gas service. ED resistant. Excellent acid and base resistance.
FEPM 7182B 90 Formulated AFLAS high-temperature, high-pressure carbon dioxide and "sour" oil & gas service. NORSOK M-710 certified ED resistant. Excellent acid and base resistance.
FEPM 7182A 95 Formulated AFLAS high-temperature, high-pressure carbon dioxide and "sour" oil & gas service. ED resistant. Excellent acid and base resistance.

ED Performance of 7182B and 7182D - NORSOK rating
D1418 Compound Thickness 5000 PSI @ 120C 11,700 PSI @ 60C 11,700 PSI @ 120C
FEPM 7182D .210 0000, 0000 0000, 0000 0000, 0000
FEPM 7182B .210 0000, 0000   0000, 0000
FEPM 7182B .139 0000, 0000   0000, 0000

Premium Quality Seals...
For a Cleaner, Safer, More Reliable World.TM

FastDash is a trademark of Seals Eastern, Inc.; OringOnline is a registered trademark of Seals Eastern, Inc.; 7182 is a trademark of Seals Eastern, Inc.; AFLAS is a registered trademark of Asahi Glass Co., Ltd.; Viton is a registered trademark of Dupont Performance Elastomers, LLC.