Sw-Cj-2k Wall Hung Air Self-Purifier (need to pick up 160mm PVC tube) SW-CJ-2K wall hung air self-purifier(need to pick up 160mm PVC tube) is the main components of the reconstruction project of clean room ,the setting of suspension height according to the users different requirements and emphasis area, return air mouth set according to the width of the room. we can set up for the single point or multi drop return air mouth, and strive to flow uniformity and air span, and install a built-in air sterilization lamp. The product has characteristic of low investment and quick effect, installation is convenient.