Downhole seals must resist degradation caused by hydrocarbons, hydrogen sulfide, and superheated steam. Advanced materials such as FKM, HNBR, and FFKM are often used to ensure consistent performance. The choice of material depends on chemical compatibility and thermal stability, which determine seal longevity and reduce maintenance costs in high-performance oilfield operations. https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/