Assembly requirements for combined sealing rings for holes
The combined sealing ring for the hole consists of an O-ring and a wear-resistant ring.
Due to the high elasticity of the O-ring, the installation is relatively easy; while the wear-resistant ring has poor elasticity, if it is installed directly, the steps and grooves of the piston will easily scratch the sealing surface and affect the sealing effect. In order to ensure that the wear ring is not damaged during installation, certain installation measures should be taken.
The wear-resistant ring is mainly made of filled polytetrafluoroethylene (PTFE) material, which has the characteristics of corrosion resistance and a large thermal expansion coefficient. Soften, then tool it into the groove of the piston.