Pressure ratings for API 6D ball valve LNG seals range from ANSI Class 150 (285 psi) through Class 2500 (6,170 psi) depending on pipeline pressure requirements. Seal design must match pressure class specifications, incorporating appropriate anti-extrusion features and material strength to contain rated pressure at cryogenic temperatures throughout valve service life https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/