O-ring seal
O-RING refers to the sealing ring with a circular section (O-ring), which is generally installed in the groove, so that the stress generated by its compression can play the sealing function.
SAE flange seal and O-ring end sealing pipe joints are sealed by O-ring, these joints are generally used for high pressure applications, mechanical equipment in the general requirements of reliability is very high, these applications are generally static pressure seal, so how to ensure the reliability of O-ring seal?
After the O-ring is loaded into the sealing groove, the section of the O-ring will bear the contact pressure and produce elastic deformation, resulting in a certain initial contact pressure P0 on the contact surface.
Even if there is no medium pressure or the pressure is very small, the O-ring can be sealed by its own elastic pressure. When the medium with pressure is filled into the cavity, the O-ring will be displaced under the action of the medium pressure.
Move to the low pressure side, while its elastic deformation further increase, fill and close the gap. Under the action of medium pressure, the contact pressure Pp is transmitted to the contact surface through the O-ring, and the pressure acting on the contact surface of the seal pair rises to Pm.
features of o-ring seal
The installation part is small in volume and occupies small space.
Simple structure, easy to install and remove.
Various kinds of materials, can be used in a wide range of temperatures (-60℃ ~ +220℃).
Withstand from both sides of the mutual pressure at the same time, also can play seal.
Compared with other sealing rings, the price is suitable.
Abundant inventory, can cope with short delivery time.
