Installation of O-rings

The quality of the O-ring installation has a significant impact on its tightness and service life. Leakage problems are often caused by poor installation.


During the installation process, the O-ring may be scratched, incorrectly installed, or twisted. Before assembly, the sealing groove and sealing mating surface must be cleaned strictly; at the same time, the surface to be passed during the assembly of the O-ring is coated with grease.


In order to prevent the O-ring from being cut or scratched by sharp edges such as sharp corners and threads during installation, a lead-in angle of 15o to 30o should be left on the shaft and hole ends of the installation. When the O-ring needs to pass through the external thread, a special thin-walled metal guide sleeve should be used to cover the external thread; if the O-ring needs to pass through the orifice, the orifice should be inverted into a corresponding oblique shape to prevent O The ring was scratched. The bevel of the bevel is generally a = 120o ~ 140o