Micro-resistance Slow-close Butterfly Check Valve
 | Micro-resistance Slow-close Butterfly Check Valve
|
Micro-resistance Slow-close Butterfly Check Valve：
Product Introduction
This micro-resistance slow-close butterfly check valve is designed for water supply and sewage pipeline systems. It effectively prevents media backflow and suppresses destructive water hammer through slow-close function, ensuring the safety of pipelines and equipment. The valve body is made of ductile iron or cast steel, offering high strength and corrosion resistance, suitable for various media such as clean water and sewage. Featuring a novel structure, compact size, light weight, and low flow resistance, the oil-operated slow-close mechanism is unaffected by media. It operates smoothly with reliable sealing, high wear resistance, long service life, and significant energy-saving benefits. Widely used in municipal water supply, sewage treatment, industrial water supply, and building HVAC systems, it is an ideal choice for pipeline backflow prevention and water hammer protection.
Structural Features
• Dual Function: Backflow Prevention + Water Hammer Protection: The butterfly check structure quickly cuts off backflow media, while the slow-close mechanism gradually closes to avoid water hammer impact.
• Micro-resistance Low Flow Design: Low fluid resistance and low head loss provide significant energy savings, reducing system operating costs.
• Media-independent Oil-operated Slow-close: The independent oil-operated slow-close system ensures smooth operation, unaffected by media impurities or viscosity.
• Highly Reliable Sealing: NBR seat sealing offers wear resistance, corrosion resistance, zero leakage, and long service life.
• Full Size Range: Available in DN40~DN1000 sizes, suitable for water supply and sewage pipeline systems of different diameters.
Material Advantages
• High-strength Body Materials: Ductile iron or cast steel body with high strength, impact resistance, and corrosion resistance, suitable for municipal and industrial water supply conditions.
• Corrosion & Wear Resistant Core Parts: Carbon steel disc, stainless steel stem, cylinder, piston, and spring ensure no rust or deformation during long-term operation.
• Reliable Sealing Components: NBR seat with wear resistance and aging resistance provides stable sealing performance, suitable for clean water and sewage media.
• Integral Forging Process: Key components are integrally formed for robust structure, no leakage risks, and long service life.
The micro-resistance slow-close butterfly check valve is widely used in the following water supply and sewage treatment scenarios:
• Municipal Water Supply Systems: Used in water plants and pump station outlet pipelines to prevent backflow and suppress water hammer, protecting pumps and pipelines.
• Sewage Treatment Plants: Used in sewage and sludge conveying pipelines to prevent equipment damage caused by media backflow.
• Industrial Water Supply Systems: Used in water supply pipelines in chemical, metallurgical, and power industries, suitable for clean water and sewage media.
• Building HVAC Systems: Used in high-rise building water supply and fire protection systems to prevent water hammer impact and ensure pipeline safety.
• Water Supply Projects in the Middle East & Southeast Asia: Adapted to local municipal water supply and sewage treatment projects, with high temperature and corrosion resistance for easy maintenance.
Specifications & Standards
• Nominal Pressure: 1.0~2.5MPa
• Nominal Diameter: DN40~DN1000mm
• Slow-close Time: 3~60 seconds (adjustable)
• Applicable Media: Clean water, sewage
• Applicable Temperature: 0~80℃
• Flange Standards: GB/T17241.6, GB/T9113
• Test Standard: GB/T13927
Installation & Maintenance
• Easy Installation: Flange connection design matches standard pipeline flanges, requiring no additional modifications for installation and saving construction costs. • Adjustable Slow-close Time: The slow-close time can be adjusted according to pipeline conditions to meet different water hammer protection needs.
• Simple Maintenance: Modular design allows quick replacement of wearing parts without disassembling the entire valve, reducing maintenance costs and downtime. • Long-term Maintenance-free Operation: Stainless steel springs and stems are corrosion and wear resistant, ensuring stable long-term operation under normal conditions.