can be installed in horizontal or vertical swing check valve disc pivoting and the fluid resistance is generally less than lift check valve. It is suitable for large caliber, installation position is not restricted, usually installed in a horizontal pipe, suitable for large diameter. By number of plate can be divided into three types: the single spiral and double spiral transformation and more hovering transformation. Single rotation check valve is generally used in medium caliber. In order to reduce the pressure of water hammer, choose in large diameter pipeline single transfer check, had better use slow close check valve, in order to reduce the water hammer pressure. The disc check valve is suitable for large and medium-sized rotated pipeline. It is small, light weight, it is a quick check. More spin check valve is suitable for large diameter pipeline.

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