-free packing. They achieve ISO 15848-1 Class BH fugitive emissions and survive 200 temperature cycles without leakage, critical for actuated and manual valves in HPHT environments. (500 characters) Seat-to-gate metal backup sealing is mandatory for fire-safe API 6FA certification. After soft seat destruction, tungsten carbide or Stellite-coated gate and seat faces provide metal-to-m... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-gate-valve-seals/