P-seals and T-seals for actuator bonnets and stem packing combine thermoplastic caps with elastomeric energizers. These low-friction designs reduce operating torque by up to 40% while maintaining stem sealing under 20,000 psi differential, making them ideal for subsea trees and high-cycle surface safety valves. https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/