Aflas O-rings and Gaskets

AFLAS_280LR

As a copolymer of tetrafluoroethylene (TFE) and propylene (P), TFE/P provides a unique combination of chemical, heat, and electrical resistance. Chemically, TFE/P resists both acids and bases, as well as steam, amine-based corrosion inhibitors, hydraulic fluids, alcohol, and petroleum fluids. TFE/P is also resistant to ozone and weather. TFE/P typically retains its remarkable chemical resistance even in high temperatures (up to 450° F / 232° C), and tests have shown that electrical resistance actually improves with heat exposure.

The first TFE/P compound to be commercially marketed was Aflas. In a sense, Aflas defined the initial boundaries for base-resistant materials. There are varying grades of Aflas, each with their own molecular weight. Most molded and extruded products are made from Aflas 150P, which has a molecular weight of about 130,000. In comparison, Aflas 100H has a molecular weight of 200,000 and is typically used where high pressures are to be sealed, such as in oil field applications. TFE/P compounds are also widely used in the chemical processing, automotive, and aerospace industries.

Explosive Decompression

Explosive Decompression(ED) or Rapid Gas Decompression(RGD) is a structural failure, a condition that occurs due to gas permeation or dissolution into the seal material. When system pressure decays quickly, the entrapped gas expands, rupturing the o-ring.

Explosive decompression may cause blistering, internal cracking and splitting of parts. Seal & Design has compounds available in EPDM, HNBR, Viton, Aflas, and Chemraz to minimize the effect of explosive decompression.  Please contact our sales staff for a proper elastomer recommendation.

Genuine Viton®

Today’s industry sometimes operates under extreme conditions. Heat, aggressive media, corrosive gasses and mechanical stress require the utmost performance from your seals. Extreme requirements demand quality assurance and the best materials, in those cases Genuine Viton®, the fluoroelastomer made by DuPont Performance Elastomers is the solution. If safety and quality assurance are a must, Genuine Viton® is the only choice.

Genuine Viton® is manufactured with 100% pure fluoroelastomers and is certified with the Viton® certificate, which is granted by DuPont Performance Elastomers. Genuine Viton® products include: O-Rings, Vulc-O-rings, O-Ring cord, Rubber molded products,Sealants, and sheeting products.

Ultimate Levels of Sealing with Chemraz

chemraz oring materialThe ultimate level of elastomeric sealing is exhibited by Chemraz perfluoroelastomer parts, which provide extended seal life, sealing force retention and thermal resistance up to 324°C, in the most aggressive chemical, hydrocarbon and petroleum process environments.

Chemraz parts offer exceptional resistance to sour oil and gas, acid and steam, and to inhibitor and process chemicals. They are available as tubing-to-packer seals, custom logging boots, standard O-rings, valve seats, diaphragms, gaskets, T-seals, column fittings, and also in virtually any custom shape.

DuPont™ Viton® Fluoroelastomer

Viton O-Rings

Viton® fluoroelastomer is the most specified fluoroelastomer, well known for its excellent (400°F/200°C) heat resistance. Viton® offers excellent resistance to aggressive fuels and chemicals and has worldwide ISO 9000 and ISO/TS 16949 registration.

There are differences between types of Viton® in terms of chemical resistance and mechanical properties. Whether your application is automotive, chemical processing or any number of other industrial applications, there is a particular type of Viton® that best meets your specific performance requirements.

The general purpose types differ primarily from the specialty types in chemical resistance. In the specialty family, the choice is among four types that are tailored for superior fluid resistance, low-temperature performance or combinations of these properties. In order to ensure product integrity and compliance to OSHA 1910.119 in finished parts made of Viton®, our seal helps guarantee that the parts you receive are made from 100% virgin Viton® from DuPont.

Contact Seal & Design for more information or to request a quote on Viton® Gaskets or Viton® O-Rings.

Chemraz high performance elastomer

Chemraz combines the resilience and sealing force of an elastomer with chemical resistance approaching that of PTFE. Chemraz solves some of the most difficult sealing problems in natural gas power generators and truck diesel engines while offering outstanding in-use cost effectiveness through reductions in warranty claims and down time.

Chemraz resists attack by nearly all chemical reagents, including inorganic and organic acids, alkaline, ketones, esters, aldehyde, alcohols and fuels. As a result, Chemraz, engineered by Greene Tweed, provides long-term service in virtually all applications where vehicle-operating temperatures are elevated and reduced emission requirements are paramount.