Industrial & High Purity Gaskets and Backing Rings AV Gaskets and Backing Rings Applications:Chemical processing, bleach plants, aquariums, mining, water treatment, landfills, swimming pools, power plants AV Gaskets Size:1/2″ – 12″ Materials:EPDMPVDF bonded EPDMPTFE bonded EPDM Bolt Patterns:ANSI 150# Backing Rings -Size: 1/2″ – 12″ – Euro Grey1/2″-24″ – Black Materials:PP with Steel Insert Bolt Patterns: ANSI 150#JIS and DIN also available Seal Clean Gasket Applications:Please consult us for the best recommendation.Available in sizes 1/2″ (20mm) through 12”(315mm), and a wide variety of SDR ratings to match pipe ID’s. Seal Clean gaskets are cleaned in a Class 100 Cleanroom and group double bagged in a PE/Nylon bag.