In the field of valve use, the bushing is within the bonnet, usually with polytetrafluoroethylene, polytetrafluoroethylene or graphite, etc., for sealing effect.
effect:
Wrap the stem and it wears out, making it easy to replace. If it is not necessary to wear the bushings, the parts are replaced after the wear. So instead of replacing the bushing (the bushing hardness is reduced during design, making it a wear piece in the collision pair). Because of its convenient processing, replacement costs are low and changeable. Of course, there are supporting effects, etc., which are secondary.

Processing method:
The bushing is used for the outside of the mechanical parts, to meet the DU boundary lubrication sleeve to seal, wear maintenance and other supporting effects. Bushings have a wide range of applications. Many components in the industrial sector, such as valves, bearings, etc., use bushings.
  Bushing effect:
   The flexibility of the bushing is relatively high, and it can have many effects. To sum up, the bushing is a type of component that is maintained in the stainless steel coiled bushing equipment. The use of bushings can reduce equipment wear, vibration, and noise, as well as prevent corrosion. The use of bushings also facilitates the repair of mechanical equipment, simplifies the construction of equipment and manufacturing techniques.
  The effectiveness of bushings in practical work has a lot to do with its use environment and intent. In the field of valve use, the bushes are trapped in the valve cap by the device to reduce the leakage of the valve and achieve the sealing effect. In the field of bearing use, the use of a bushing can reduce wear between the bearing and the shaft seat and prevent the gap between the shaft and the hole from increasing.
  Lining material:
   The material of the liner is mostly soft metal, rubber, nylon and non-metal polymer, etc. The texture of these materials is relatively soft and the cost is low. In a variety of harsh working environments, the bushing is subject to oscillations, conflicts, and corrosion to maintain the wrapped parts, and the liner itself is easily replaced after being damaged, the cost is low, and the economy is good.
  The lifting bush is a kind of processing method that adopts the floating ball seat bushing and adopts the standard steel ball, the car exits the upper and lower ends, and then drills and reams the hole, reducing the machining of the ball material selected by the original technology in the prior art. Difficulty, together prevent the waste of information, simplify the technology, and reduce the cost.
  Summarize briefly, this type of floating bush bearing bushing processing method: use standard steel ball → car both ends → drilling → reaming.