LNG seals in API 6D ball valves face unique challenges due to cryogenic conditions. At temperatures around -162°C for LNG, conventional elastomers become rigid and fail, leading to potential leakage paths. Specialized seals use low-temperature polymers like PCTFE, TFM, or filled PTFE combined with energizers such as stainless steel, Inconel, or Elgiloy springs to maintain contact pres... https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/