The differences between butterfly valves and gate valves

Butterfly valves and gate valves are two kinds of commonly used valves, but there are many differences in the structure and method of use, adapt to the working conditions, etc. Here we will help you know more about the differences between gate valves and butterfly valves, so as to help you to do a good job of valve selection.

Before explaining the differences between butterfly valves and gate valves, let's see the definition of them, maybe from the definition, you can find the differences.

Затвор дисковый, we can also say it flap valve. Its opening and closing part is a disc-shaped butterfly plate, the butterfly plate is fixed on the top of the stem, around which the valve stem valve axis can open and close. The movement direction of butterfly valve is rotating in place, from fully open to fully closed only need to rotate 90°. In addition, the plate of the butterfly valve does not have self-locking ability, it is necessary to install a turbine reducer on the valve stem, then the butterfly plate can self-lock, and it can also improve the operating performance of the butterfly valve.

Gate valve, as its name, can cut off the medium in the pipeline like a gate, is a kind of valve we will use in life. The opening and closing parts of the gate valve is called the wedge, the wedge do lifting movement, the direction of its movement and the direction of the media flow in the fluid pipeline is perpendicular to the direction of the wedge; gate valve is a cut-off valve, can only be fully open or fully closed, can not regulate the flow.

On the base of the definition, we will talk about the differences between gate and butterfly valves:

Difference in the movement ability:
on the base of the above, we understand the direction of movement and the difference between the movement mode, in addition, the gate valve can only be fully open and fully closed, so when fully open, the flow resistance of the gate valve is smaller; though when butterfly valves fully open, the butterfly plate can produce resistance on the flow of the media. In addition, the opening height of the gate valve is higher, so the opening and closing speed is slow; while the butterfly valve only needs to rotate 90 ° to complete opening and closing, so it can open and close quickly.

Difference in role and use:
Gate valve sealing performance is good. It is often used to cut off the flow of media in the pipeline which mostly requires of strict sealing, and do not need to often repeatedly switch. Gate valve cannot be used to regulate the flow, in addition, because of the slow opening and closing speed of the gate valve, it is not suitable for cutting off in the pipeline emergently. Butterfly valve is used more widely, butterfly valve can not only be used to cut off the media, but also has the function of regulating the size of the flow. In addition, the butterfly valve open and close quickly, can also be opened and closed frequently, especially suitable for the occasion of rapid opening or cutting off.
Butterfly valves are smaller than gate valves, and their weight is also lighter. Therefore, in some environments with limited installation space, it is recommended to use wafer-type butterfly valves in order to save more space. Among large-diameter valves, butterfly valves are used most widely. They are also recommended for pipelines transporting in which the media contain small impurity particles.
In the selection of valves for many working conditions, butterfly valves have gradually replaced other types of valves and become the first choice for many users.

Difference in price:
Under the same pressure and the same diameter, the price of gate valves is higher than that of butterfly valves. Meanwhile, the diameter of the butterfly valve can be made very large.

This article is provided by ZZJG VALVE Company. If you need updated valve information, please contact us via Email: [email protected] or WhatsApp: +86 18135671959.