API 6A gate valve seals must maintain integrity under HPHT conditions where pressures exceed 10,000 psi and temperatures surpass 350°F. Seal materials and geometries are engineered to resist creep, relaxation, and thermal degradation. Metal seals are often preferred in these conditions, while soft seals may serve as secondary barriers. API 6A validation testing ensures seals perform r... https://globalsealstech.com/