Seat insert materials like PCTFE excel in ultra-low temperatures for LNG service. PCTFE offers superior dimensional stability and low gas permeability compared to standard PTFE. It withstands pressures over 750 psi while maintaining tight shutoff. In trunnion-mounted designs, PCTFE seats reduce torque and wear, supporting frequent operation in regasification terminals. https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/