1, Lined fluorine valve flange cover can not be opened, unless it is prepared to connect with the pipeline, PTFE flange surface may be due to temperature, foreign body caused by bump scratch or distortion affect the seal, such as due to inspection needs to move the cover , But also must be tested soon after the reset cover to protect the PTFE flange surface. 2, Lined fluorine valve and pipe connections, the general is no longer used alone shims, but with dissimilar materials (metal surface, etc.) flange face phase, should be appropriate gasket to protect the PTFE flange surface. 3, Lined fluorine valve in the system, such as leakage occurs at higher temperatures, the system should first be cooled to room temperature, and then identify the reasons for maintenance. 4, Do not allow any high-temperature welding on the fluorine-lined valve to avoid permanent damage to the liner. 5, the installation flange nut should diagonally (symmetrically) followed by uniform tightening, and with the appropriate torque: a if the flange sealing surface leak, and the leakage position nut has been locked, then you should relax the leak location Nut half circle, and then exert the same torque on the opposite side of the lock again. b If the above measures have not yet stopped leakage, should check whether the PTFE flange surface with indentation indentation, scratches, then available fine paper, cloth to be re-leveling connection. 6, Lined fluorine valve should be stored in a dry and ventilated room, stacking is strictly prohibited. 7, After the repair of the fluorine-containing valve before use according to the relevant standards before testing can be installed. 8, manual operation of fluorine valve, the force is not allowed to force open with other leverage, off the valve. 9, the directional requirements of the fluorine-fluorine valve installed in the installation should pay attention to the flow of media should be along the arrow on the body shown in the direction and to ensure that the operation and maintenance convenience. 10, Long-term storage of fluorine-containing valve seal should be slightly Kai separate state, to avoid long-term compression of the sealing surface permanent deformation, affecting the sealing performance and service life.