Fluorine-lined Valve Instructions And Installation Precautions

Lined Valve Instructions for use and installation precautions

1 The flange cover of the fluorine-lined valve cannot be opened at will unless it is ready to be connected to the pipeline. Otherwise, the PTFE flange surface may be scratched or deformed due to temperature difference or foreign matter, which may affect the sealing. If the cover is moved for inspection purposes, it is also necessary to quickly reset the cover after inspection to protect the PTFE flange surface.

2 When the fluorine-lined valve is connected to the pipeline, a gasket is generally not used alone. However, when it is connected to the flange surface of a different material (metal surface, etc.), an appropriate gasket should be used to protect the PTFE flange surface.

3 When the fluorine-lined valve is used in the system, if leakage occurs at a higher temperature, the system temperature should be lowered to room temperature first, and then the cause should be found out and repaired.

4 During installation, the flange nuts should be tightened evenly in the diagonal direction (symmetrically) and with appropriate torque: a If the flange sealing surface leaks and the nut at the leaking position has been tightened, the nut at the leaking position should be loosened half a turn, and then the opposite side should be tightened again with the same torque; b If the above method still fails to stop the leak, check whether there are concave and convex marks or scratches on the PTFE flange surface. At that time, fine gauze paper or cloth can be used to level it and reconnect it.

10 The sealing pair of the fluorine-lined valve stored for a long time should be slightly opened and separated to prevent the sealing surface from being deformed due to long-term pressure, which will affect the sealing function and service life.