O-type rubber ring sealing principle and installation precautions

Sealing principle of O ring

O-shaped rubber ring is also called O-ring for short because its cross-sectional shape is circular. It belongs to the squeeze type sealing device. Its working principle is to rely on the elastic deformation of the seal, so that a certain contact pressure will be generated on the sealing contact surface. When the contact pressure is greater than the internal pressure of the sealing medium, it can be Play a sealing role, otherwise there will be leakage problems.

Precautions for installation of O-shaped rubber ring

1. Do not damage the sealing surface and the sealing line of the O-shaped rubber ring surface
The sealing performance of the O-shaped rubber ring mainly depends on the upper and lower end faces or the lip line associated with the hole or the shaft. These parts have good elasticity and softness, but at the same time, it is also relatively easy to damage, so it is easy to be damaged during installation. Attention should be paid to protection.

2. Do not install by force
Some O-shaped rubber tight rings need to be installed in a grooved stuffing box. At this time, you need to be careful not to install brutally or violently during installation, especially when the size of some O-rings does not match the installed parts, you cannot force it. In order to avoid damaging the original prefabricated structure of the O-ring, please pay attention to the size matching before installation, and be careful and careful during installation.

3. Pay attention to balance and symmetry during installation
Install the O-shaped rubber ring at the position that just fastens the effective sealing surface or the lip line. After installation, you can check the effect of the sealing and tightening to prevent leakage during future use.