Spring-Energized Seal Stacks incorporate helical or cantilever springs within PTFE or elastomer jackets, providing constant preload for low-pressure sealing in vacuum-like downhole voids. This compensates for material shrinkage at cryogenic temps or extrusion gaps at 15,000 PSI. Used in subsea connectors, they maintain contact during thermal cycling from -50°C to 200°C. Canted coil sp... https://globalsealstech.com/media/