What Is An Extruded Seal?
Dec 05, 2022
O-ring
O-ring with O-ring section is a typical extruded seal. The huge pressure on the sealing surface will compress and deform the shape of the sealing element to achieve the purpose of sealing. For this reason, large friction resistance and frequent sliding
The friction heat will increase, which will shorten the service life of the seal. In order to reduce sliding friction resistance and friction heat, the compression deformation ratio of O-ring should be reduced, but this will reduce the sealing capacity.
Combined seal
In order to reduce friction, a low friction polytetrafluoroethylene (PTFE) composite seal (called sliding seal) used on the sliding surface is developed. Compared with lip seal, the sealing capacity of the composite seal is lower, but it has
Low sliding resistance. Because of these characteristics, this seal is mainly used as the piston seal of the hydraulic cylinder.
