Fugitive emissions compliance with ISO 15848 and API 624 limits allowable stem seal leakage rates. Type testing qualifies valve designs meeting emission standards. Production testing verifies manufactured valves comply. LNG's environmental impact and flammability make emissions control critical. Low-emission stem seal designs using advanced materials and configurations meet increasing... https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/