Rotary elbow in stern mainly applies to connect flexibly when deliver mud floating elbow on working.It has big rotation angle, smaller abrasion loss, and it is convenient to adjust angle for dredging swing,to adapt to the turning of the dredge.
　　Rotary elbow set up in heavy grease lubrication bearing,to remove or reduce the tension of floating elbow, installed hub axial of self-lubricating shaft sleeve on the bottom of rotary elbow, installed interchangeable sealing element and Stainless steel components in rotary elbow, greatly reduced the maintenance cost and time.