Sealing surface
Sealing surfaces are the workpiece surfaces against which a sealing element rests in its installation position. The decisive factor for the sealing effect is that the sealing element closes the gap between the two surfaces.
Each seal has at least two sealing surfaces. This can be explained using the example of a rod seal.
A groove in the outer part (cylinder) accommodates the sealing element, while the inner part (piston) is pushed in. The primary sealing effect occurs between the two sealing surfaces on the groove base of the outer part and the surface of the inner part.
The flanks of the installation groove can be regarded as additional sealing surfaces.
#1 Definition of sealing surface
Together with the sealing element, the sealing surfaces form the essential components of a sealing system. For the sealing function, it is necessary that the sealing element completely fills the gap between the sealing surfaces.
#2 Significance of the sealing surface
In addition to operating conditions such as heat and pressure, unevenness in the sealing surfaces and inaccuracies in their positioning in relation to each other also put a strain on the sealing system. Pressing the sealing element between the sealing surfaces helps to fill in small irregularities.
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