Electric Knife Gate Valve . The knife gate valve has a small installation space, low working pressure, long service life and simple maintenance. Electric knife gate valve is generally selected by water supply and drainage professional technical personnel in the engineering design of the valve electric device to put forward. China Electric Knife Gate Valve (PZ973) China Gate Valve, Knife Gate from www.made-in-china.com Electric knife gate valve is generally selected by water supply and drainage professional technical personnel in the engineering design of the valve electric device to put forward. Suitable medium:molasses, pulp, sewage, coal pulp, ash, slag water. The knife gate valve has a small installation space, low working pressure, long service life and simple maintenance.