How to evaluate the sealing performance of O-ring?

Evaluating the sealing performance of O-rings requires consideration of a range of factors to ensure reliability under different conditions. We adhere to strict inspection and testing procedures to maintain high quality standards. The key evaluation points include:
1. Appearance inspection: Preliminary inspection to ensure that there are no visible defects such as bubbles, cracks, or impurities, as these defects may affect the sealing effect.
2. Dimensional measurement: Use precision tools to measure the inner diameter, outer diameter, and cross-sectional thickness of the O-ring. These measurements must comply with design specifications and tolerances as the basis for sealing integrity.
3. Hardness testing: Using a Shore hardness tester, we verify whether the hardness of the O-ring meets the material properties and design requirements, which is crucial for sealing reliability.
4. Stretching and elongation testing: This step evaluates the elasticity and durability of the O-ring, which is crucial for maintaining its sealing function over long-term use.
5. Compression deformation test: After a period of compression, test the deformation of the O-ring. This measurement helps predict long-term sealing effectiveness.
6. Air tightness and liquid tightness testing: Install the O-ring in a suitable tool and conduct air tightness or liquid tightness testing under working pressure to confirm no leakage performance.
7. Aging resistance test: Simulate environments including high and low temperatures, oil immersion, and exposure to chemical media to test the aging resistance of O-rings. This ensures that it can maintain its sealing ability even under harsh conditions.
Through these meticulous testing procedures, we ensure that the produced O-rings meet strict performance standards, providing our customers with reliable sealing solutions suitable for various applications.