The bushing is a matching part used outside the mechanical parts to achieve the functions of sealing, wear protection, etc. It refers to the ring sleeve that functions as a gasket. In the field of valve applications, the bushing is inside the valve cover, and corrosion-resistant materials such as polytetrafluoroethylene or graphite are generally used for sealing. In the moving parts, the wear of the parts is caused by long-term friction. When the gap between the shaft and the hole is worn to a certain extent, the parts must be replaced. Therefore, the designer chooses lower hardness and better wear resistance when designing. The material is the shaft sleeve or bushing, which can reduce the wear of the shaft and the seat. When the shaft sleeve or the sleeve is worn to a certain extent, replace it, which can save the cost of replacing the shaft or the seat.
