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The stop valve and the gate valve have some similarities in appearance, and both have the function of cutting off in the pipeline, so people often wonder, what is the difference between a stop valve and a gate valve? Globe valves, gate valves, butterfly valves, check valves and ball valves, etc. These valves are now indispensable control components in various piping systems. Every kind of valve whether in appearance,

The stop valve and the gate valve have some similarities in appearance, and both have the function of cutting off in the pipeline, so people often wonder, what is the difference between a stop valve and a gate valve?

Globe valves, gate valves, butterfly valves, check valves and ball valves, etc. These valves are now indispensable control components in various piping systems. Each kind of valve is different in appearance, structure and even functional purpose. However, the stop valve and the gate valve have some similarities in appearance, and both have the function of cutting off in the pipeline. Therefore, many friends who have not much contact with the valve will confuse the two. In fact, if you observe carefully, the difference between the globe valve and the gate valve is quite big. The editor of this article will introduce the difference between globe valve and gate valve.

1. The working principle of globe valve and gate valve is different

When the shut-off valve is opened and closed, the stem rises. Turn the handwheel, and the handwheel will rotate and lift together with the valve stem; while the gate valve rotates the handwheel to make the valve stem move up and down, and the handwheel itself is in position. constant.

The gate valve has only two states: fully open or fully closed. The opening and closing stroke of the gate is large, and the opening and closing time is long; the movement stroke of the valve plate of the stop valve is much smaller, and the valve plate of the stop valve can stop at a certain position during movement. For one, it is used for flow adjustment, while the gate valve can only be used for cut-off and has no other functions.

2. The performance difference between globe valve and gate valve

The shut-off valve can be used for cut-off and flow adjustment. The fluid resistance of the globe valve is relatively large, and it is more laborious to open and close, but because the distance between the valve plate and the sealing surface is short, the opening and closing stroke is short.

The gate valve can only be fully opened and fully closed. When it is fully opened, the medium flow resistance in the valve body channel is almost zero, so the opening and closing of the gate valve will be very labor-saving, but the gate is far away from the sealing surface and the opening and closing time is long.

3. The installation flow direction difference between globe valve and gate valve

The effect of the gate valve in both directions is the same. There is no requirement for the inlet and outlet directions for installation, and the medium can flow in both directions.

The shut-off valve needs to be installed in strict accordance with the direction of the arrow mark on the valve body. There is also a clear stipulation about the direction of the inlet and outlet of the shut-off valve. my country's valve "Sanhua" stipulates that the flow direction of the shut-off valve shall be from top to bottom.

4. The structure difference between globe valve and gate valve

The structure of the gate valve will be more complicated than the shut-off valve. From the appearance point of view, the gate valve is taller than the shut-off valve and the shut-off valve is longer than the gate valve in the case of the same caliber. In addition, the gate valve is divided into a bright rod and a dark rod, but the shut-off valve does not.