The opening and closing part of the gate valve is the gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled.
The gate of the gate valve moves linearly with the valve stem, which is called a lift-rod gate valve (also called a rising-rod gate valve). Usually, there are trapezoidal threads on the lift rod. Through the nut at the top of the valve and the guide groove on the valve body, the rotary motion is changed into a linear motion, that is, the operating torque is changed into an operating thrust.
Gate valves have the following advantages:
The fluid resistance is small, and the sealing surface is less brushed and eroded by the medium. Opening and closing is more labor-saving.
The flow direction of the medium is not restricted, the flow is not disturbed, and the pressure is not reduced.
The shape is simple, the length of the structure is short, the manufacturing process is good, and the scope of application is wide.
