Materials used in high-pressure API 6A gate valve seals include elastomers, thermoplastics, and metal composites. Elastomeric seals typically utilize nitrile rubber, fluorocarbon, or HNBR formulations. Metal seals employ stainless steel or inconel for extreme temperature applications. Material selection depends on factors including working pressure, temperature range, and chemical com... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-gate-valve-seals/