1. Plastic PTFE tube or valve flange cover cannot be disassembled at will. Unless ready to connect with the pipeline, the PTFE flange surface may be bumped or deformed due to temperature difference or foreign objects, which may affect the seal. When the cover is removed, the cover should be reset in time to protect the PTFE sealing surface.
2. When connecting plastic PTFE tubes or valves, gaskets are generally no longer used separately, but when connecting with flange surfaces of different materials (metal surfaces, etc.), appropriate gaskets should be used to protect the PTFE sealing surface.
3. In principle, it is not allowed to do any gas cutting or welding work on the pipeline or valve, so as to avoid permanent damage to the lining layer, and it must be ignited under special circumstances.
4. During installation, the flange nuts should be tightened evenly according to the diagonal direction and equipped with appropriate torque: if the sealing surface of the flange leaks, and the nut at the leakage position has been tightened, the half circle of the nut at the leakage position should be loosened at this time Then, apply the same torque to the opposite side to lock again; if the above method still does not stop the leak, you should check the PTFE sealing surface for convex and concave indentations and scratches, then use fine sandpaper and cloth to smooth and reconnect.