Helium leak detector rubber seals Description
The role of helium leak detectors rubber seals
Rubber seals are used in helium leak detectors for the following purposes:
Ensure tightness: Through its good elasticity and deformation ability, the rubber seal can tightly fit the interface between the measured object and the leak detection system, prevent helium leakage, and ensure the accuracy of the leak detection process.
Adapt to different environments: Rubber seals can adapt to different temperatures, pressures, and media environments to ensure that they can maintain good sealing performance under complex working conditions.
Improved leak detection efficiency: High-quality rubber seals can reduce the number of leak points, improve leak detection efficiency, and shorten inspection time.
| NBR | FKM | Silicone rubber |
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Hardness: Shore A hardness 40-90. Tensile strength: 10-25MPa. Elongation at break: 300%-600%. Temperature range: -20°C to 150°C. |
Hardness: Shore A hardness 60-90. Tensile strength: 10-20MPa. Elongation at break: 150%-300%. Temperature range: -20°C to 200°C. |
Hardness: Shore A hardness 30-80. Tensile strength: 4-10MPa. Elongation at break: 400%-800%. Temperature range: -100°C to 350°C. |
Selection and installation of rubber seals
Choosing the right rubber seal is critical to ensuring the accuracy and reliability of your helium leak detector. When choosing, the following factors should be considered:
Working environment: including temperature, pressure, medium, etc. Different working environments have different requirements for rubber seals, and materials that can adapt to the current climate should be selected.
Sealing requirements: According to the sealing requirements of the helium leak detector, select rubber seals with corresponding sealing performance. For example, materials with less air permeability should be chosen for high vacuum systems.
Cost: Based on ensuring reliability, the cost of rubber seals should be considered to avoid excessive waste.

When installing, the following steps should be followed:
Clean the interface: Ensure that the interface between the object to be measured and the leak detection system is clean and free of oil and impurities.
Correct installation: Correct installation of the interface according to its shape and size. Make sure the seal fits snugly and seamlessly with the interface.
Check the tightness: After the installation, the tightness check should be carried out. Leaks can be determined by injecting helium and observing the readings from the mass spectrometer.
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