The gate of a rising stem gate valve moves linearly with the valve stem, usually with trapezoidal threads on the lifting rod. Through the nut at the top of the valve and the guide groove on the valve body, the rotational motion is converted into linear motion, that is, the operating torque is converted into operating thrust. By rotating the handwheel, the valve plate connected to the valve stem can be raised or lowered through the advance and retreat of the handwheel and the thread of the valve stem, achieving the purpose of opening and closing. The opening and closing component of a rising stem gate valve is the gate plate, and the direction of movement of the gate plate is perpendicular to the fluid direction. The gate valve can only be fully opened and closed, and cannot be adjusted or throttled.