DN350 DN400 DN450 DN500 DN600 D700 DN800 DN900 DN1000 DN1200 Manual Worm Gear Wafer Cast Ductile Iron Butterfly Valve

DN350 DN400 DN450 DN500 DN600 D700 DN800 DN900 DN1000 DN1200 Manual Worm Gear Wafer Cast Ductile Iron Butterfly Valve. Worm Gear delivers high output torque with minimal manual effort for smooth 90 degree disc rotation. Wafer-type design enables compact, lightweight construction and easy installation between standard pipe flanges. Centerline disc geometry ensures low flow resistance and minimizes pressure drop across the valve. Ductile iron body and stainless steel disc provide excellent strength, corrosion resistance, and long service life. Bidirectional bubble-tight sealing ensures zero leakage in both flow directions for reliable shut-off. Extended stem option allows convenient ground-level operation for underground or submerged pipeline installations. Precision-machined disc and seat surfaces guarantee stable, repeatable throttling performance. Materials are selectable based on specific media, temperature, and pressure conditions for optimal compatibility. Simple quarter-turn operation enables rapid opening and closing for emergency shut-off scenarios. Low maintenance design with rugged construction reduces downtime and overall lifecycle costs.