The DRVZ Silent Check Valve is designed for water supply, drainage, fire protection, and agricultural irrigation systems. Installed at pump outlets, it effectively prevents media backflow and suppresses destructive water hammer, protecting pumps and pipeline equipment. The valve body is made of ductile iron (QT450) with high strength and corrosion resistance, suitable for water service. Featuring a streamlined internal flow path for low head loss, the short-stroke disc paired with a stainless steel spring ensures quick, smooth closure with zero noise, vibration, or failures. It offers reliable sealing, low maintenance, and long service life, making it an ideal solution for backflow prevention and water hammer protection in water supply systems.
Structural Features
•Streamlined Flow Path: Optimized internal design minimizes head loss, delivering significant energy savings and reducing system operating costs.
• Silent Impact-Free Closure: Short-stroke disc with stainless steel spring enables quick, smooth closure with zero noise or vibration, eliminating water hammer shock.
• Highly Reliable Sealing: NBR-lined disc provides excellent sealing performance with zero leakage, ideal for water service.
• Corrosion & Wear Resistant Components: Stainless steel springs, disc stem sleeves, and copper sleeves resist wear and corrosion for stable long-term operation.
• Standard Flange Connection: Industry-standard flange dimensions ensure compatibility with common pipeline systems for easy installation.
Material Advantages
• High-Strength Body: QT450 ductile iron body offers high strength, impact resistance, and corrosion resistance, suitable for water supply and fire protection applications.
• Corrosion-Resistant Core Parts: 304 stainless steel disc stem sleeves and springs, combined with HPb59 copper sleeves, provide excellent wear and corrosion resistance for extended service life.
• Reliable Sealing: NBR-lined disc offers aging and wear resistance, ensuring stable sealing performance in water service.
• Integral Casting Process: One-piece casting of the valve body and flow guide ensures robust structure, smooth flow paths, and no dead zones.
Application Scenarios
The DRVZ Silent Check Valve is widely used in the following water supply and related systems:
• Municipal Water Supply Systems: Installed at pump outlets in water plants and pumping stations to prevent backflow and suppress water hammer, protecting pumps and pipelines.
• Fire Protection Systems: Used in high-rise buildings and commercial building fire water supply pipelines to prevent water hammer impact and ensure system safety. • Water Supply & Sewage Systems: Prevents equipment damage caused by media backflow in water supply and drainage pipelines.
• Agricultural Irrigation Systems: Protects pumps and irrigation equipment at irrigation pump outlets, extending service life.
• Water Supply Projects in the Middle East & Southeast Asia: Adapted to local municipal water supply and fire protection projects, with high temperature and corrosion resistance for easy maintenance.
• Easy Installation: Flange connection design matches standard pipeline flanges, requiring no additional modifications for installation and saving construction costs. • Installation Direction: Install according to the flow direction arrow on the valve body, ensuring the disc opens in the same direction as water flow to avoid performance issues from reverse installation.
• 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 stem components are corrosion and wear resistant, ensuring stable long-term operation under normal conditions.
