A ductile iron butterfly valve is a valve with a ductile iron body (e.g., QT450-10, QT500-7). It operates by manually, pneumatically, or electrically rotating the disc (0–90°) to cut off, connect, or regulate flow in low-to-medium-pressure pipelines. Its core advantage lies in "ductile iron toughness + cost-effectiveness": ductile iron offers superior mechanical properties compared to gray cast iron (30% higher tensile strength, 10x+ better toughness), with impact resistance, reduced brittleness, and lower cost than stainless steel. Its compact design and low flow resistance make it ideal for water treatment, municipal, HVAC, and agricultural systems where body strength is required but strong corrosion resistance is not needed. Compliance with GB/T 12238 (butterfly valve standard) and GB/T 1348 (ductile iron standard) ensures structural reliability and sealing stability.
Key Applications
- Municipal Water Supply/Drainage: Used in water plants and pump stations for flow regulation or shut-off.
- Fire Protection Systems: Grooved ductile iron butterfly valves enable quick installation in sprinkler systems.
- HVAC (Heating, Ventilation, Air Conditioning): Controls flow in hot/cold water systems.
- Industrial Systems: Suitable for compressed air, oils, and mildly corrosive media.
- Building Networks: Manages flow in high-rise building water and fire protection systems.
- Light Chemical Industry: Handles mildly corrosive liquids (e.g., brine, coolants).
Contact Us For Ductile Iron Butterfly Valve Date Sheet