What are the points to pay attention to when selecting and installing O-rings?

O-ring is widely used in various dynamic and static sealing occasions because of its low manufacturing cost and convenient use.

Factors to consider when choosing an O-ring:
1. Sealing method 
According to the type of load, it can be divided into static seal and dynamic seal; according to the purpose of sealing, it can be divided into hole seal, shaft seal and rotary shaft seal; according to its installation method, it can be divided into radial device and axial device. For radial installation, for shaft seals, the deviation between the inner diameter of the O-ring and the diameter d2 to be sealed should be as small as possible; for hole seals, the inner diameter should be equal to or slightly smaller than the diameter d1 of the groove.

2. Working medium and working conditions 
When selecting the O-ring material, the compatibility with the working medium should be considered first. The pressure, temperature, continuous operation time, operation cycle and other operating conditions at the seal must also be considered.

The key aspects that must be paid attention to when using o-rings are as follows:

When installing the o-ring, it is necessary to keep the installation environment in order, especially to prevent dust from entering the installation position. If hard plastic particles enter, it will cause serious damage to the surface of the o-ring during the entire operation. The damage will reduce the overall service life of the product. The damage of the surface material will also increase the corrosion of the internal chemical substances such as fuel, which will lead to greater damage after a period of use.

The o-ring installation has to organize the surface of the o-ring, and at the same time, further organize the installation position, especially the contact surface, so as to improve the appearance between the o-ring and the sealing member, and have more The actual effect of stable sealing is that the surface of the machine can be inspected. If there are fine gaps and unevenness, it can be dealt with and maintained in time. Under normal circumstances, the O-ring can only perform its sealing function exceptionally when both surfaces are smooth and clean, and at the same time have a long service life, otherwise it is very easy to cause damage.