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Knife-type gate valve equipped with solenoid valves, proximity switches and other accessories can be completed on and off the two position control and signal output, but also to complete the automatic control of continuous action. Knife gate valve is widely used in chemical industry, coal, sugar, sewage, paper and other fields, is an ideal seal gate valve. Particularly suitable for the paper industry in the pipeline for regulation and cutting use. Knife gate valve installation and maintenance should note the following: 1, hand wheel, handle and drive are not allowed to start lifting, and no collision. 2, double gate valve should be mounted vertically (ie stem in a vertical position, the hand wheel at the top). 3, with bypass valve gate valve should be opened before opening the bypass valve (to balance the pressure difference between import and export and reduce the opening force). 4, with the gear valve, according to the instructions of the product installation instructions. 5, if the valve is often used switch, lubrication at least once a month.