Electro-hydraulic knife gate valve is a kind of equipment with the advantages of light weight, simple and compact structure, reliable sealing performance, long service life, and cutting medium. Its scope of use is as follows: 1. It is used in mining, coal washing, coal washing and washing pipelines, slag filtering and slurry pipelines, and ash discharge pipelines in the iron and steel industry. 2. It is used to purify wastewater, mud, dirt and clarified water with suspended solids in the device. 3. It can be used for any concentration pulp and feed water mixture in the paper industry. 4. Used for ash removal in power stations.