Customized Double Cartridge Mechanical Seal AS-C260

• t Details

This seal is customized double cattridge mechanical seal suitable in various applications

Background Knowledge：

How to use pressure compensation groove to enhance sealing effect of the mechanical seal

Excessively high pressure of the sealed fluid or hydraulic shock can cause the O-ring to leak. If the pressure exceeds 4MPa, there may be oil leakage. After adding a retaining ring, the pressure can be increased. However, the hydraulic shock will make the local instantaneous pressure several times higher than the normal working pressure, which may cause the O-ring to lose its sealing performance. In this case, a groove with a pressure compensation function can be used.With this kind of groove, no leakage can be achieved even under the pressure of 16MPa. The groove size of this O-ring seal is: the groove width b is 0.2~1mm larger than the wire diameter d1 of the O-ring, the bottom diameter D of the groove is 0.2~2mm smaller than the inner diameter of the O-ring, and 2~4 small holes with a diameter of 2~4mm should be drilled near the bottom of the groove. Besides, a single-acting hydraulic cylinder can be punched at one end, and a double-acting hydraulic cylinder can be punched at both ends.1) The matching clearance between the outer diameter of the piston and the cylinder diameter can be enlarged. The larger the diameter of the o-ring section, the larger the clearance, generally 0.1~0.5mm. The usual seal contact point is at the outer diameter. At this point, as the pressure increases, the contact becomes tighter, which plays a role in pressure compensation. At the same time, there is no greater requirement for the dimensional tolerance of the piston, and the surface roughness is R6.3~3.2um.