The difference between globe valve and butterfly valve

What is the difference between globe valve and butterfly valve? If you know the valve, you should know that the functions of the globe valve and the butterfly valve are similar, and they can be used for both flow regulation and cut-off. The difference is that when it is used to adjust the flow, the flow adjustment function of the globe valve is better, while the butterfly valve has the advantages of wider application, shorter structure length and simpler structure. If you don't know about globe valve and butterfly valve, this article will take you to learn about it.

The closing principle of the globe valve is to rely on the pressure of the valve stem to make the sealing surface of the valve disc and the sealing surface of the valve seat closely fit to prevent the flow of the medium.
The globe valve only allows the medium to flow in one direction, and has directionality during installation. The valve stem of the globe valve has a relatively short opening or closing stroke, and has a very reliable cut-off function. Since the change of the valve seat port is proportional to the stroke of the valve disc, it is very suitable for flow regulation. Therefore, this type of shut-off globe valve is very suitable for shut-off or regulation and throttling. The structural length of the globe valve is large.
Globe valve advantages:

1. The working stroke is small and the opening and closing time is short.
2. Good sealing performance, small friction between sealing surfaces and long service life.
3. There is only one sealing surface, the manufacturing process is good, and it is easy to maintain.

Disadvantages of globe valve:

1. The fluid resistance is large, and the force required for opening and closing is large.
2. It is not suitable for medium with particles, high viscosity and easy coking.

Butterfly valve is a kind of regulating valve with simple structure, and can also be used for on-off control of low-pressure pipeline medium. There are many kinds of butterfly valves and their uses are very wide. Butterfly valve is suitable for pipelines conveying various corrosive and non-corrosive fluid media in engineering systems such as producer, coal gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting, power generation and environmental protection. flow of the medium. Butterfly valves have two-way seals and one-way seals.
The advantages of butterfly valve:

1. The opening and closing is convenient and quick, labor-saving, and the fluid resistance is small, which can be operated frequently.
2. Simple structure, small size, short structure length, light weight, suitable for large-diameter valves.
3. The mud can be transported, and the liquid accumulation at the pipe mouth is the least.
4. Under low pressure, good sealing can be achieved.

Disadvantages of butterfly valve:

1. The operating pressure and working temperature range are small.
2. The sealing performance is relatively poor.