Filtering device, especially a suction return filter

The present invention relates to a filtering device, especially a suction return filter, having a filter housing which includes two utility connections and a tank connection. The filter housing serves as a holder of at least one filter element, and is provided with three non-return valves. Two of the non-return valves are maintained in closed settings under spring bias. A filtering device, especially a suction return filter includes a filter housing having two useful connections and a tank connection, and accommodates at least one filter element. The filter housing also provided with three return valves, two of which are held in the closing position by spring loads. All of the return valves are combined as a module at one end of the filter housing. The remaining return valve is configured as an integral constituent part of one of the spring-loaded return valves, has an opposite opening direction relative to it, and is not spring loaded. This arrangement enables the return valve unit to have a compact arrangement which can be structurally easily connected to the filter housing at a central point.