Single-idler airtight belt conveyor adopt special external design for single idler and bearings to make it easy to service.It's own specific totally enclosed device solve the problems that material is scattered and the dust pollution fundamentally. Bearings of the single-idler airtight belt conveyor are placed outside the shell that can ensure dust is sealed ,making it easy to service and extending the service life. Beside, there are access doors on the head and tail that can make it fast to service the head and tail.