How to ensure the service life of knife gate valves
To ensure the service life of the knife gate valve, the structure of the valve and the materials of the main components must be selected according to the working conditions, otherwise it will inevitably reduce the service life of the valve. At the same time, maintenance and upkeep of the valve should be strengthened during use. Such as regular cleaning of dirt, regular grease injection, regular maintenance, etc., to extend the service life of the valve. Each driving device has its own force characteristics, which are related to different specific pressure values on the sealing surface, as well as the stress on the valve stem, valve stem nut, and other components. When the electric device is closed to the end point, it will cause impact loads on the sealing surface, especially for globe valves. When valves are installed and used outdoors, the working conditions are poor because they are prone to rusting due to wind and rain, and sometimes even damage lubrication. If dust and sand fall into the joints of the parts, it will accelerate the wear of the parts. If the valve is installed and used at sea, the working environment of the wide door will be even worse. Knife type gate valves are exposed to salt spray and are susceptible to corrosion by chloride ions. Knife type gate valves are prone to rust and lose their function as wide gates. The selection of knife type gate valves should consider resistance to chloride ion corrosion, and attention should also be paid to the coating of the outer surface. If the valve is installed underground, a fully welded valve with an extended length should be selected to prevent the knife type gate valve from being corroded by groundwater and mud and sand after burial, which may damage the connecting parts and moving parts of the valve.
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