Common hydraulic seal rings used for hydraulic cylinders include the following types: dust ring, piston rod seal ring, buffer seal ring, guide support ring, end cover seal ring and piston seal ring.

The hydraulic cylinder is a kind of hydraulic actuating element that converts hydraulic energy into linear motion mechanical work. Before installation, first check the surface quality of the seals. The geometric dimensions and accuracy of the seals must meet the standard requirements.

Mating Ring manufacturers have arranged the methods for installing the hydraulic cylinder seal ring:

Before installation, first check the surface quality of the sealing element, without flash, burr, crack and trimming. Defects such as porosity and looseness, and the geometric dimensions and accuracy of seals shall meet the standard requirements.

The combined seal ring for hole is composed of O-ring and wear ring:

The O-ring is easy to install due to its large elasticity; The wear ring has poor elasticity. If it is installed directly, the steps and grooves of the piston are easy to scratch its sealing surface, affecting the sealing effect. To ensure that the wear ring will not be damaged during installation, certain installation measures should be taken. The wear ring is mainly made of filled polytetrafluoroethylene (PTFE) material, which has corrosion resistance and large thermal expansion coefficient. Therefore, before installation, soak it in 100 ℃ oil for 20 minutes to make it gradually soft, and then use the tooling shown in Figure 2 to install it into the groove of the piston.

The tooling is composed of positioning sleeve and expansion sleeve. The head of the locating sleeve has a 5o chamfer, which is used to guide the O-ring and wear ring into the groove at the end of the piston. The expansion sleeve is made of 65 Mn steel with good elasticity through heat treatment and processed into a uniform and symmetrical 8-lobe structure. It should be noted that when machining the holes at the bottom of each flap, the indexing should be uniform. When milling each flap, the saw mouth should be aligned with the center of the hole to ensure that each flap of the expanding sleeve can expand evenly. At the same time, all parts shall be chamfered (smooth) to avoid damaging the sealing ring.