Performance indices and test method for reverse check valves

In order to ensure the anti-floating stability of concrete linings and to prevent water infiltration, the drainage system with the function that meets the requirements of both seepage control and drainage is widely needed in water conservancy projects. One of the choices is the reverse check valve. As a new product, the reverse check valve is not widely used, neither its performance nor method is available, which brings a certain risks to projects. The closed head, open head and drainage quantity are put forward based on the engineering requirements and work principles as the common indices for the reverse check valve. The test equipment and method are developed for the reverse check valve. The long-term performance of the reverse check valve is analyzed. The research findings may provide reference for the tests on the reverse check valve.