Viton™ Fluoroelastomers for Pharma, Food, and Beverage Applications
Viton™ fluoroelastomers, a brand of the Chemours company, offer outstanding durability, flexibility, and resistance for various applications and industries.
Viton™ fluoroelastomers are excellent for use in food and pharma applications. While EPDM and silicones are often used in such applications, EPDMs have a low resistance to cleaning fluids and silicones exhibit relatively poor steam resistance. Viton™ APA polymers combine superior resistance to steam, commercial cleaning fluids, and many other chemicals.
They provide superior performance in applications where FDA repeat use for food contact compliance is required. This includes seals and gaskets for pharmaceutical, food, and beverage applications. Viton™ GF-600S and Extreme™ ETP-600S offer outstanding resistance to cleaning fluids, sterilization steam, and process chemicals compared to other sealing materials.
Viton™ GF-600Sis a high fluorine, peroxide-cured fluoroelastomer that offers superior steam resistance, excellent compression set, and outstanding tolerance to cleaning fluids and chemicals. It provides a superior performance in comparison to traditional FKMs and bisphenol-cured dipolymers.
Viton™ GF-600S is FDA compliant with limitations for repeat-use applications as outlined in Food Contact Notification (FCN) 510.
Viton™ Extreme™ ETP-600S is an outstanding fluoroelastomer that offers excellent resistance to hydrocarbons, acids, bases, alcohols, ketones, esters, and many other solvents. Parts made with Extreme™ ETP-600S are also highly resistant to steam and extreme process conditions.
Viton™ Extreme™ ETP-600S is FDA compliant with limitations for repeat-use applications as outlined in Food Contact Notification (FCN) 53.
Viton™ fluoroelastomers made with APA technology vs.Viton™ A-401C (FKM) and other elastomers—% of original tensile strength* in 80 psi steam (156 °C [313 °F]) after 672 hours:
Bisphenol-cured Viton™ fluoroelastomers are known for their excellent steam resistance. However, as shown in the graph, vulcanizates based on Viton™ GF-600S and Viton™ Extreme™ ETP-600S provide an even better resistance to property loss in steam.
Viton™ polymers based on APA technology provide excellent retention of tensile properties in steam aging, while the vulcanizate's strength made with silicone drops off to nearly zero in less than 400 hours.
Viton™ GF-600S and Viton™ Extreme™ ETP-600S demonstrate improved resistance to cleaning fluids, such as Chematic® 91, Chematic® 9301, and CIP 220® in comparison to bisphenol cure dipolymer FKM, and EPDM:
Viton™ GF-600S and Viton™ Extreme™ ETP-600S exhibit lower volume loss or swell in various cleaning fluids. They maintain their sealing performance, hardness, and tensile strength under pressure.
The resultsshow that after aging in various commercial cleaning fluids, compounds based on Viton™ GF-600S and Viton™ Extreme™ ETP-600S show low to no changes in tensile strength. In contrast, Silicone vulcanizates demonstrate a more significant tensile strength loss after 1,008 hours of aging.
Percent change in volume after 336 hours at 23°C (73°F) of fluid aging: