JP2539978B

PURPOSE:To prevent the liquid leak at the time of the replacement of a filter and to perform filter replacing work safely, sanitarily and rapidly by providing a valve opening a flow passage when a unit container is set to a sheath part and closing the same when the unit container is detached to a double structure filter container. CONSTITUTION:The structure of a filter container is constituted of a standing sheath part 1 having a pressure-resistant structure and the disposable unit container set to the inside of the sheath part 1 and having a cartridge filter 8 built therein. The unit container 28 is constituted as a double-structure filter container equipped with valves 13,14 opening a flow passage when the unit container 28 is set to the sheath part 1 and closing the same when the unit container 28 is detached. Each of the valves 13,14 is composed of a plastic molded body and a plurality of legs 19 are attached to the periphery of the disk-shaped valve body thereof at a definite angle and repulsive force is applied to the legs in the derection always restored to the original shape with respect to the opening of the valves 13,14. As a result, the liquid leak at the time of the replacement of a filter is prevented and filter replacing work can be performed safely, sanitarily and rapidly.