Valves composed of curved arms, floating balls and other components can be used to automatically control the liquid level of the water tower or pool. It has the characteristics of simple maintenance, flexibility and durability, high accuracy of liquid level control, water level not interfered by water pressure, and tight opening and closing without leakage. 

  [Structural features] 

 1. The valve is equipped with opening and closing position indications; 

 2. Locking device; 

 3. Valve stem anti-fly structure; 

 4. Anti-static device; 

 5. Fire protection structure; 

 6. Unique valve seat sealing structure; 

 7. The middle flange (the connection between the valve body and the left body) has no external leakage structure.

Each process, each facility, and each environmental constraint has its own special requirements. Therefore, Dongyan offers a comprehensive range of products covering different performance levels, pressures, different functions and different materials.