Is The Gate Valve Linear Or Rotary?

The gate valve is a linear motion valve, and its opening and closing parts (the gate) realize the opening or closing of the valve through linear motion perpendicular to the direction of the fluid, rather than through rotation.

Movement mode of gate valve

Linear motion

The gate is the key component of the gate valve, and the opening and closing of the valve are controlled by the linear up-and-down movement of the valve stem.
When the valve stem is lifted upward, the gate rises accordingly, the valve opens, and the fluid can pass through; when the valve stem moves downward, the gate drops, the valve closes, and the fluid is prevented from passing through.
Non-rotational motion

The gate of the gate valve does not rotate during the movement but only moves linearly.
This design makes the gate perpendicular to the flow direction of the fluid when the gate valve is fully open or fully closed, and the fluid resistance is small.
Features of gate valve

Simple structure: The gate valve consists of components such as the valve body, gate, stem, valve cover, and sealing device, and the structure is relatively simple.
Good sealing performance: The sealing surface between the gate and the valve seat usually adopts metal-to-metal or metal-to-non-metal sealing, and the sealing performance is reliable.
Small fluid resistance: When the gate valve is fully open, the fluid channel is unobstructed, and the fluid resistance is small.
Applicable to large-diameter pipelines: Gate valves are often used in large-diameter, low-pressure pipeline systems, such as water supply and drainage, fire protection, petrochemical, and other fields.
Comparison with other valves:

Comparison with ball valves

Ball valves are opened and closed by rotating the ball and are rotary motion valves.
Gate valves control the flow of fluids through the linear motion of the gate.
Comparison with butterfly valves

Butterfly valves adjust the flow rate by rotating the butterfly plate and are rotary motion valves.
The gate does not rotate during the opening and closing process of the gate valve.
The gate valve is a linear motion valve, and its gate plate opens and closes the valve through linear motion perpendicular to the direction of the fluid. This design makes the gate valve have the advantages of simple structure, good sealing performance, and small fluid resistance, and it is widely used in various industrial pipeline systems.