The ring sleeve which plays the role of padding is in the application field of the valve. The bushing is within the cover of the valve. It is usually used for the sealing effect of the corrosion resistant materials such as polytetrafluoroethylene or graphite.
The axle sleeve made of friction reducing material in sliding bearing is also called bearing bushing and bushing. Usually cast on the inner surface of the Bush, mainly to reduce costs and save valuable grinding materials. Thickness 0.5-6mm for large or important bearings. The bearing bushing is mainly used to replace the shaft wear. Besides, it also has the function of supporting shaft running, reducing friction and wear and reducing vibration.