Elastomeric seal materials for API 6A applications include nitrile (NBR), hydrogenated nitrile (HNBR), fluorocarbon (FKM), and perfluoroelastomer (FFKM). NBR provides economical sealing for sweet service to 180°F. HNBR extends temperature capability to 300°F with improved chemical resistance. FKM withstands 400°F and aggressive fluids. FFKM offers ultimate performance to 500°F in extr... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/