WFJ 50 sealed track power & free suspended conveyor is mainly composed of the traction power components, power & free straight track, power & free bent track, power & free conveyor, branch turnout, combined turnout, stopper, descending section and electrical control components. The four-wheel push hook of traction chain is connected by the double hinged chain; the distance of push hook is an integral multiple time of 200. The power & free conveyor is composed of the front and back trolleys and bearing beam.