What factors should be considered in choosing O-seal ring?

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

O-ring is an automatic two-way sealing element. The pre-compression of its radial and axial aspects during installation is applied to the initial sealing capacity of the O-ring seal itself. It increases with the increase of system pressure.

Factors considered in choosing the O-ring:

1. Sealing form

According to the load type can be divided into static seal and dynamic seal; According to the sealing use can be divided into hole seal, shaft seal and rotary shaft seal; According to its installation form can be divided into radial installation and axial installation. When installing radially, for the shaft seal, the deviation between the inner diameter of the O-ring and the sealed diameter d2 should be as small as possible; For the hole seal, the inner diameter should be made equal to or slightly smaller than the diameter d1 of the groove.

2. Working medium and working conditions

When selecting the O-ring material, you must first consider the compatibility with the working medium. It is also necessary to consider the pressure, temperature, continuous working time, operating cycle and other working conditions at the seal.