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A Comprehensive Guide to AED Seals: Understanding Viton® 90, Viton® 90 B-Type, HNBR 90, FFKM 90, and Viton® 95
October 17, 2024 – by Eastern Seals
Anti-Explosive Decompression (AED) seals are critical in industries where extreme pressure changes occur, such as oil and gas, aerospace, and subsea applications. AED seals, designed to withstand rapid decompression, protect equipment from failure when gas absorbed under high pressure suddenly expands and bursts during decompression. As leading suppliers of high-performance seals, we offer a range of AED seals made from advanced materials like Viton® 90, Viton® 90 B-Type, HNBR 90, FFKM 90, and Viton® 95, each with unique properties suited for specific applications.
What Are AED Seals?
AED seals are designed to handle Explosive Decompression (ED), a phenomenon that occurs when high-pressure gas trapped within a material expands rapidly during decompression, potentially causing the seal to blister, crack, or fail. Industries operating in high-pressure environments rely on AED seals to maintain integrity and ensure safety. Seals made from standard materials often fail under such conditions, leading to costly equipment damage and downtime. That’s where AED-rated materials, like those provided by Eastern Seals, come into play.
Key AED Seal Materials from Eastern Seals
We offer a variety of AED seals, each tailored to different operating environments and conditions. Let’s explore some of the most popular options:
Viton® 90
Viton® 90 is a fluoroelastomer known for its excellent chemical resistance and ability to withstand high temperatures. Its AED rating makes it ideal for applications in aggressive environments, such as oil and gas exploration, where exposure to harsh chemicals like hydrogen sulfide (H₂S) and hydrocarbons is common. Viton® 90 offers superb resistance to explosive decompression, ensuring long-term reliability and performance.
Viton® 90 B-Type
Viton® 90 B-Type is a specialized variation of standard Viton® 90, offering enhanced flexibility and compression set resistance. This variant provides a balance between toughness and flexibility, making it suitable for dynamic applications where seals may experience repeated compression and relaxation. It’s ideal for subsea and offshore environments where fluctuating pressures and temperatures demand higher performance standards.
HNBR 90
HNBR (Hydrogenated Nitrile Butadiene Rubber) 90 is another material widely used for AED seals, especially in oilfield applications. HNBR 90 offers exceptional resistance to oil, chemicals, and high temperatures. Additionally, it exhibits excellent mechanical properties, such as tensile strength and abrasion resistance, making it a reliable choice for harsh environments like drilling and hydraulic equipment. Its superior resistance to explosive decompression further enhances its performance under extreme pressure.
FFKM 90
FFKM (Perfluoroelastomer) 90 is the ultimate choice for AED seals when chemical resistance is paramount. FFKM 90 can withstand exposure to virtually all chemicals, including aggressive acids, amines, and solvents, and operates in extreme temperatures ranging from -40°C to 327°C. This material is perfect for applications that demand the highest levels of chemical and thermal stability, such as refining, chemical processing, and high-end aerospace applications. Its AED rating ensures it will maintain integrity even under rapid decompression.
Viton® 95
Viton® 95 offers enhanced hardness and durability compared to Viton® 90. This makes it suitable for high-pressure environments where the seal must maintain structural integrity under extreme conditions. Viton® 95 is often used in applications where a combination of high chemical resistance, AED protection, and mechanical strength is necessary, such as in valves, pumps, and other critical sealing applications.
Choosing the Right AED Seal
Selecting the appropriate AED seal depends on several factors, including the chemical environment, operating temperature, and pressure conditions. Our range of materials, including Viton® 90, Viton® 90 B-Type, HNBR 90, FFKM 90, and Viton® 95, ensures that there is a suitable option for every demanding application.
Conclusion
AED seals are vital for maintaining equipment safety and longevity in high-pressure environments, and Eastern Seals provides some of the best materials for the job. Whether you need the high chemical resistance of FFKM 90, the flexibility of Viton® 90 B-Type, or the mechanical strength of Viton® 95, Eastern Seals offers a comprehensive range of AED-rated materials that deliver outstanding performance under extreme conditions. For more information, visit Eastern Seals to find the right AED seal for your application.
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