Regarding the fatal problem that occurs when installing Swagelok dual card sleeves
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Both of the two cards in the picture are from Swagelok. Please tell me why the front card has such a probability. This situation will also occur when using domestically produced products. After countless experiments, I came to the conclusion. . The chance of appearing seems to be random. The same ferrule, the same connector, the same working environment, but different conclusions randomly appear. I am puzzled.
I read an article many years ago that there are three coating technologies for preventing bite of ferrules. SWAGELOK and Parker are at the front.
Can you still find the article? Thank you. Thank you.
In addition, I have tried base materials with different hardnesses, hrc11-30. The probability of bite is small if it is not nitrided, but the probability is higher if it is nitrided.
Judging from your description, it may be that the hardness of the nitrided base material increases, making it easier to cause bite problems when in contact with the ferrule. Harder materials will put greater stress on the ferrule, which may cause seizure if the quality or design of the ferrule cannot withstand this stress. If this happens frequently, you may need to consider changing the ferrule material or design, or adjusting the processing parameters. This is my guess, more in-depth testing and analysis may be needed if the specific cause is to be determined. It is recommended that you consult Swagelok technical support or related professionals. They may have a more professional understanding and answer to this situation. .
Thank you for your reply. I make ferrules myself, and I come into contact with a lot of ferrules. Swagelok has the best inlayability, and peers have copied Swagelok ferrules one-to-one, including base material, size, and nitriding hardness. However, the final effect was too random. Later, I purchased a Swagelok card sleeve and discovered during the experiment that there was also a chance of such bite. I really can't figure it out.
Among them, the hardness of the ferrule is greater than that of the joint body and that of the tubing. I also tried soft-based card sleeves, but the final result was not satisfactory. I asked Swagelok China, and they had only a limited understanding, but they just insisted that there was no problem with the card sleeve. Why
Also, I would like to ask if there are any metal coatings that are colorless or natural. Increase self-lubrication and prevent seizure
Card sleeve connection: 1) Material ； 2) Processing accuracy ； When the pressure is relatively high and leakage requirements are strict, it is recommended to use products with good accuracy.
They are all made by Citizen machines. The size can be one to one, and the tolerance is within 1 wire.
The first one is that it works wonders with great force. It’s normal. Don’t get into any mystical theory about coating or hardness. Anyone who has ever turned a wrench knows this.