All LNG ball valve packing components undergo 100% helium mass-spectrometer leak testing at 10⁻⁹ mbar·l/s sensitivity. This ensures zero defects before installation and provides documented proof of sealing integrity for the most demanding LNG operators and engineering contractors worldwide. ( https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/