The HH44X series micro resistance slow closing check valve is engineered for water supply and drainage pipelines. Installed at pump outlets, it prevents medium backflow and eliminates destructive water hammer while effectively reducing valve closing water hammer pressure to ensure pipeline network safety.

This check valve operates using inlet medium flow rate and water head to automatically open the valve disc. When water flow stops or pumps shut down suddenly, the valve disc begins closing but maintains a 20% opening via piston pressure, allowing controlled water passage that weakens water hammer pressure before gradual closure through micro adjustment valve control.

• Lightweight valve disc with large opening and low fluid resistance
• Innovative water hammer elimination mechanism for stable, reliable sealing
• Counterweight device reduces opening force by 80% compared to rotary valves
• Adjustable damping system with customizable timing prevents destructive water hammer
• Advanced adhesive-coated valve disc design ensures corrosion resistance and extended service life
• Smooth, vibration-free operation with minimal noise generation
• Durable QT450 construction with excellent wear resistance