Bi-directional API 6D LNG ball valve seals Singapore handle pressure from both upstream and downstream with symmetrical lip designs. Elgiloy springs provide constant force across wide temperature ranges. Singapore floating storage and regasification units (FSRUs) install these seals for versatile operation in varying flow directions and bunkering scenarios. https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/