Overflow valve device installed on valve group

The utility model relates to an overflow valve device mounted on a valve group, which is an overflow valve oil channel mounted on the valve group; the overflow valve device mounted on the valve group is adopted and composed of two components; wherein, an overflow valve is welded on the valve group; the overflow valve is connected with an oil tank to form a loop through a soft pipe; the overflow valve is mounted on the valve group to construct an oil channel decomposition and to reduce the oil quantity in the return travel; the oil flow can be adjusted optionally according to requirements; the overflow valve mounted on the valve group has the advantages of simple application, easy maintenance and saving investment.