Double-clack check valve casting

The utility model discloses a bivalve check valve casting, and relates to the technical field of bivalve check valve castings, the bivalve check valve casting comprises a check valve casting pipe and a fixing block, a sealing limiting assembly is arranged in the check valve casting pipe, and a first limiting sleeve and a second limiting sleeve are used for installing the check valve casting pipe to improve the use stability effect. A transmission shaft arranged in a check valve casting pipe is movably connected with a limiting shaft through a sealing shaft, a sealing gasket and a gasket improve connection between a check pipe and a sliding rod, limiting is facilitated, the sealing effect is improved, a water outlet cast iron ring facilitates use of the check pipe, and a double-clack limiting pad can be closed when water flows through so that the water flows through. The double-clack limiting pad can be reset to be in a parallel state through the reset spring arranged in the sliding rod, water at the water out