Double flap valves are a reliable solution for industrial applications involving fine powders and large granular products. In some processes, they are used as an alternative to rotary valves. They are installed in units operating under positive or negative pressure. These valves are designed to maintain the pressure differential above and below the valve, ensuring uninterrupted material flow. It is the optimal alternative solution for applications where rotary airlocks are prone to jamming and for coarse particles and abrasive materials that will damage the airlock.

 

HOW IT WORKS

These valves are designed with two separate gate systems. The initial valve is opened to permit the material accumulated on the initial valve to descend into the lower chamber. The initial valve is then closed once more to prevent air leakage and material loss. A portion of the material is then transferred into the first chamber. The second lid is then opened, allowing the lower portion of the material in the chamber to be emptied. The second lid is subsequently closed to prevent air leakage and leakage. In this manner, the initial lid is opened and closed. Subsequently, the second lid is opened and closed. This cycle is continuous. It is essential to note that one valve is always closed at all times. This process ensures that air leakage is prevented in both positive and negative pressure applications.