Twin ferrule tube fittings leak after installation and during use. What is the reason for the leak? It can be easily solved in three steps!
We often hear that the twin ferrule tube fittings and valves are not easy to use, unreliable, and leak after installation testing. No matter how hard the nut is tightened, it is useless. And we often hear that the twin ferrule tube fittings
and valves on the pipeline leak shortly after use. What causes these leaks?
The reason is usually that you are not confident in three key points. Mastering these three steps can easily solve the double ferrule connection.
Firstly, choose twin ferrule tube fittings products from major brands. A high-quality double ferrule product is a crucial step towards success. For example: Swgelok, Parker, Hikelok, etc. Because after the double ferrule products are connected, the double ferrule and the tubing are clamped together, and the double ferrule completes the clamping and sealing, with permanent deformation, this type of product cannot be fully inspected like valves when leaving the factory. It can only rely on strong technology and information-based process control to ensure that the quality of millions of products is consistent. Some products produced by small factories are not guaranteed.
Secondly, select qualified tubing. The tubing must meet the ASTM A269 standard, which is a minimum requirement that regular manufacturers should be able to achieve. In addition to meeting the standards, you also need to pay extra attention to the surface quality of the tubing. There should be no pits or longitudinal scratches. A good surface quality is crucial in the double ferrule connection, because the double ferrule connection is a metal hard seal, and a good tubing surface can ensure sealing. At the same time, you also need to choose a tubing with appropriate hardness. The hardness of the tubing is generally required to be HRB ≤ 85, and tubing with uneven annealing have different hardness. The tubing in the hard part match the ferrule connection part, which will cause the tubing to not be well clamped by the ferrule and there is a risk of tubing detachment. You also need to pay attention to the roundness of the tubing, as elliptical tubing cannot seal well. If you cannot control these factors, it is recommended that you choose a manufacturer that can supply twin ferrule tube fittings, valves and tubing to purchase together.
Thirdly, proper installation is the final step in the key steps of double ferrule connection. Use a sharp tube cutter to cut the tubing, use a deburring tool to remove burrs from the inner and outer ports of the tubing, insert the tubing into the bottom of the twin ferrule tube fitting or valve, mark the position of the nut relative to the tubing with a marker pen, and complete the installation by 1-1/4 turns. Remember not to install based on intuition or torque. For specific installation instructions, please refer to the installation guide videos of Hikelok.
With three easy steps, your system will no longer be troubled by leaks.
Professional manufacturer of Hikelok instrument valves and fittings.
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