QT450 Butterfly Valve

A QT450 butterfly valve is a lightweight, cost-effective quarter-turn rotary valve cast from QT450-10 ductile iron (a Chinese metallurgical standard equivalent to GGG40 or ASTM Grade 60-40-18), offering high structural ductility and impact resistance for low-to-medium pressure utility lines. Typically configured as a concentric wafer or lug valve with a resilient rubber liner (EPDM or NBR), its disc rotates 90 degrees to achieve a low-torque, bubble-tight seal in non-aggressive liquid networks. Conforming to standards like GB/T 12238, EN 593, and ISO 5211, these versatile valves are widely used in commercial HVAC, fire protection systems, and municipal water treatment, allowing mechanical contractors to secure dependable, economical flow isolation by importing certified QT450 butterfly valves directly from premier manufacturers in China via our advanced B2B commercial platform.