1)Strictly speaking, it does not belong to the seal, because it does not have a sealing function, in a broad sense,
it can also be said to be a seal, because it is an integral part of the sealed composite structure.
2)Guide ring, also known as wear ring, support ring, when the volume supply is also called the guide belt, wear belt and so on.
Its role is to guide and absorb radial forces on the piston and piston rods. It has a lot of advantages compared with the metal wear ring,
mainly in: can absorb mechanical vibration; allow a larger radial clearance, will not be slightly worse due to coaxial pin piston rods;
maintenance easy replacement and cost low. Its material is mainly modified polytetrafluoroethylene, phenolic resin + fabric, polyoxymethylene + glass fiber and so on.
3)After the modified Teflon guide ring: starting resistance is small, low speed is not easy to crawl; low friction, suitable for high speed,
medium and light load cylinder and hydraulic cylinder occasions (cylinder basically use this guide ring); After the application can be applied to oil-free cylinder.
Phenolic resin + Cloth fabric, POM + glass fiber guide ring: its carrying capacity up to the modified polytetrafluoroethylene guide ring of dozens
or even hundred times for heavy duty, high pressure hydraulic cylinder occasions.