O-Ring Compression Ratio Selection Guide

# O-Ring Compression Ratio Selection Guide

## Static Applications

Target 18–25% compression depending on pressure and temperature; account for thermal expansion.

## Dynamic Applications

Use 10–18% compression to limit friction and wear; provide lubrication and surface finish control.

## Calculation Method

Show formulas for compression, squeeze, and gland fill; highlight ISO 3601 tolerances.

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