Johnson Valves offer a comprehensive range of both double-flanged and single-flanged butterfly valves, which are commonly referred to as mono-flanged valves. These high-quality products are meticulously constructed to adhere to industry standards, specifically the JIS F7480 and EN558-1 specifications, ensuring reliability and performance. Our diverse selection of valves is designed to accommodate various applications and is available with flanges that are fully compatible with BS4504 PN6/10/16, ANSI 150, and JIS 5/10K standards.