PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
What are the leakage of PTFE gasket
Classification:
Industry dynamics
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Release time:
2022-06-09
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PTFE gasket in daily life has a wide range of applications, in many industries are playing a very important role, then, we understand its use? I believe that some friends are not very understanding of this, then let Xiaobian simple to introduce to you, together to understand it.
Teflon gaskets are mainly cut by some polytetrafluoroethylene rods and tubes. After cutting, flat gaskets are formed orV-shaped gaskets, and some will be cut into piston rings, etc., have good corrosion resistance and non-conductive properties, the following editor will give you a detailed introduction.
PTFE gaskets are widely used. For cracks in industrial facilities, PTFE gaskets can be used for plugging and repairing, and can also be used for the installation and splicing of some brittle materials.
Teflon gaskets are not only used in industrial facilities, but also widely used in some related facilities in the field of food or medicine, because Teflon gaskets will not cause any pollution to the material of the repair facilities, and it is a sealed and clean product.
The leakage methods of PTFE gasket include: soaking leakage, interface leakage, destruction leakage and dispersion leakage.
1. infiltration and leakage: Because soft materials are mostly fibers, they are easily wetted by the medium, especially under pressure. Due to capillary conditions, the medium will penetrate to the high pressure side, forming a leak.
2. interface leakage: due to interfaceTeflon gasketInsufficient compression, improper flange joint brightness, flange deformation, etc., will cause leakage at the sealing interface. For interface leakage, it can be prevented by clamping the flange surface with a soft gasket.
3. damage and leakage:Teflon gasketThe working conditions of the seal are stubborn, the thermal deformation is large, and it is often subjected to vibration, impact, improper installation, excessive tightening force, repeated application, shrinkage deformation, internal stress concentration, damage exceeding fatigue strength, data aging, conversion, etc. will cause damage and Leakage. This kind of leakage has great influence and harm, so we must strengthen prevention.
4. dispersion leakage: under the promotion of concentration difference, the medium is exposed through the material transmission of the sealed gap or the sealed material capillary. Dispersion is the result of molecular activity, not unidirectional. WhenTeflon gasketWhen the pressure difference is small or in a vacuum state, or when sealing leaking substances such as nitrogen and hydrogen, as well as highly toxic and jettable substances, special attention should be paid to both leakage and dispersion.
Key words:
Teflon gasket
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