Z941 national standard electric flange gate valve is one of the most common opening and closing valves, which uses the upper and lower work of the gate plate to connect (fully open) and cut off (fully closed) the fluid medium in the pipeline. This type of gate valve is widely used as a regulating and intercepting device on tap water, sewage, construction, petroleum, chemical, food, medicine, textile, electric power, shipbuilding, metallurgy, energy system and other body pipelines.