1. What is the Parker O-Rings Squeeze Equation?

The Parker O-Rings squeeze equation calculates the compression ratio of an O-ring in its gland. This measurement is crucial for ensuring proper sealing performance and preventing leakage in hydraulic and pneumatic systems.

2. How Does the Calculator Work?

The calculator uses the Parker O-Rings equation:

Where:

• \( S \) — Squeeze (unitless)
• \( CS \) — Cross-section diameter (mm)
• \( GD \) — Gland depth (mm)

Explanation: The equation calculates the percentage compression of the O-ring by comparing the difference between its cross-section and the gland depth relative to its original size.

3. Importance of Squeeze Calculation

Details: Proper O-ring squeeze is essential for creating effective seals. Too little squeeze can cause leakage, while too much squeeze can lead to premature failure, extrusion, or difficulty in assembly.

4. Using the Calculator

Tips: Enter cross-section diameter and gland depth in millimeters. Both values must be positive numbers, with gland depth typically less than cross-section diameter for proper sealing.

5. Frequently Asked Questions (FAQ)

Q1: What is the ideal squeeze percentage for O-rings?
A: Typically 15-30% for static seals and 10-20% for dynamic seals, though specific applications may vary.

Q2: Why is squeeze expressed as a unitless value?
A: Squeeze represents a ratio or percentage of compression, making it a dimensionless quantity.

Q3: What happens if the squeeze is too high?
A: Excessive squeeze can cause high friction, difficult assembly, increased wear, and potential O-ring failure.

Q4: Can this calculator be used for all O-ring materials?
A: While the calculation method is universal, different materials may have different optimal squeeze ranges.

Q5: How does temperature affect O-ring squeeze?
A: Temperature changes can affect material properties and thermal expansion, which may alter the effective squeeze in operation.