1. The hardness of the hydraulic cylinder seal is selected from 92 degrees to 97 degrees. The higher the hydraulic cylinder pressure, the greater the hardness of the seal.
2. The linear speed of the lip of the seal must meet 0.5 m/s.
3. The temperature resistance of the culture seal must meet the temperature of -30℃～110℃. Because the temperature of the contact surface of the lip of the seal is higher than the temperature of the hydraulic oil, the selection of the seal must be resistant to high temperature of 110 °C; and the temperature in some places is around -30 °C, so the selection of the seal must be resistant to low temperature -30 °C.
4. To choose special seals, such as shaft seals, only shaft special seals can be selected. The piston seal can only choose the special seal for the piston, but not the dual-purpose seal for the shaft and the piston. Because the bottom width of the dual-purpose seal is smaller than the bottom width of the special seal. When the hydraulic cylinder is under high pressure, the bottom deformation of the dual-purpose seal is large, and the special seal has a wider bottom under the same pressure, and the compression deformation is small, and the possibility of being squeezed out by the piston rod becomes smaller. A gasket should be added to the bottom of the hydraulic cylinder seal. Why add a gasket and what is the hardness of the gasket? Since the pressure of the oil hydraulic cylinder is above 25Mpa, the height of the seal determines the size of the deformation at the bottom of the seal, that is, the size of the extrusion gap, because the gasket also has hardness and deformation. Adding the gasket is equal to reducing the deformation of the seal. When the hydraulic cylinder makes the seal under high pressure, the bottom of the hydraulic cylinder reduces the possibility of friction with the piston rod or the inner wall of the hydraulic cylinder, thereby reducing the root of the seal from being squeezed out. the probability of damage. The relationship between gasket hardness and pressure is that the greater the pressure, the greater the hardness.