fluorine lining gate valve

Daily maintenance of regulating valve

by:Lianke Valve     2022-07-27
The control valve has the characteristics of simple structure and reliable action, but because it is in direct contact with the process medium, its performance directly affects the quality of the system and environmental pollution, so the control valve must be regularly maintained and repaired, especially for harsh and important operating conditions. On occasion, more attention should be paid to maintenance work. Key inspection parts: 1. Valve inner wall For regulating valves used in high pressure difference and corrosive media, the valve inner wall and the diaphragm of the diaphragm valve are often impacted and corroded by the medium, and the pressure and corrosion resistance must be checked. 2. Valve seat When the regulating valve is working, due to the infiltration of the medium, the inner surface of the thread used for fixing the valve seat is easily corroded and the valve seat is loosened. Pay attention when checking. For valves that work under high pressure difference, it is also necessary to check whether the sealing surface of the valve seat is damaged. 3. The valve core and the valve core are the movable parts during adjustment work. They are most seriously eroded and corroded by the medium. During maintenance, carefully check whether the various parts of the valve core are corroded and worn, especially in the case of high pressure difference. The wear is more serious (due to cavitation) and should be paid attention to. When the valve core is seriously damaged, it should be replaced. In addition, attention should be paid to whether the valve stem also has a similar phenomenon, or the connection with the valve core is loose. 4. Diaphragm 'O' rings and other gaskets. The diaphragm and 'O'-shaped gasket in the regulating valve should be checked for aging and cracking. 5. Sealing packing Pay attention to whether the polytetrafluoroethylene packing and sealing lubricating grease are aging, and whether the mating surface is damaged, and should be replaced when necessary.
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