The gate valve uses the gate plate as the opening and closing member. The valve stem is raised and lowered to drive the gate plate up and down to achieve the opening and closing of the valve. The direction of movement of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully open and fully closed, not adjusted and throttled.It can be applied to water, steam, oil, nitric acid, acetic acid, oxidizing media, urea and other media respectively.