O-Rings, which are widely used as hydraulic sealing elements, are widely used in automotive and machinery sectors as well as other industry branches due to their ease of assembly, simple shape and low cost. They are also suitable for use in both static and dynamic applications.
The use of O-Ring provides certain advantages. These:
O-ring slots are easy to dimension. During dimensioning, the dimensions of the seat should be considered, as the depth of the seat will determine the O-Ring discharge rate. Dynamic (hydraulic and pneumatic), radial compression, axial compression (static), triangular and trapezoidal O-ring housing types are available.
O-Ring material hardness ranges from 60 to 90 Shore A. Soft materials (60 Shore A) provide better sealing at low pressure (<160 bar for static application, <63 bar for dynamic application), while hard materials (90 Shore A) for high pressure (> 160 bar for static application,> 63 bar for dynamic application) suitable. General purpose O-Rings have an average hardness of 70 Shore A.
The most important factor in determining the O-Ring hardness is pressure and working clearance. The harder the choice of material is, the higher the working gap and pressure.
The assembly area (table) must be clean.
Dust, dirt, etc. on the part to be assembled and O-Ring. There must be no.
The reaction of the elastomer used should be investigated and suitable lubricants and / or lubricants should be used.
When mounting, the O-ring must not be damaged by rolling.
There should be no sharp edges, particles or holes in the area where the O-Ring will be placed.
Space saving. Requires less volume than all other sealing elements that perform the same function,
Sealing in both directions,
The assembly process does not require any experience and does not create a danger to be installed in the opposite direction,
Easy to process O-ring seat,
It can be used on more coarse surface compared to gaskets in static applications ..
The sealing effect of the O-ring is caused by axial or radial deformation during assembly. This deformation is ensured by the proper design of the housing. The resetting force of the rubber forms a sealing force. This sealing force is also supported by ambient pressure.
The O-Ring material acts as a very high viscosity fluid. Material leakage occurs if the gap between the sealing surface and the seat edges is too high, or if the pressure exceeds the deformation limit of the O-ring. The maximum pressure that the O-Rings can operate without material flow is controlled by the O-Ring hardness and the working clearance. If the O-Rings are to be used under static conditions and there is no flow gap, there is no limit to the pressure to withstand.