Stem seal assemblies prevent external leakage along valve stems in LNG service. Multiple seal configurations include stacked V-rings, compression packing, or spring-energized seals. Anti-extrusion backup rings support seals against pressure. Cryogenic-compatible lubricants prevent seal freezing and facilitate stem movement. Stem seal design must accommodate thermal contraction while m... https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/