The Spring Energized seal for 6A gate valve (temperature range -60~180, pressure can reach 20000psi) is for the petrochemical industry Of oil and gas exploitation, Christmas tree, offshore drilling platform. It’s composed of PTFE jacket + V-type stainless steel or alloy spring. The high-strength back-up ring will be needed when the pressure is coming up to high. It is generally used on products with PR1 requirements.