The bushing refers to a loop that acts as a cushion. In the field of valve applications, the bushing is inside the bonnet, and a corrosion-resistant material such as polytetrafluoroethylene or graphite is generally used for sealing.

Looping sleeve

In the field of valve applications, the bushing is inside the bonnet, wrapped around the valve stem, and generally uses a corrosion-resistant material such as Teflon or graphite for sealing.