The sealing of the globe valve and the butterfly valve is good

Which is better sealing of the globe valve or the butterfly valve? The answer, of course, is the stop valve. The globe valve and butterfly valve are both valves that need to be opened and closed by manual operation. When closed, the valve plate produces a sealing effect by squeezing the sealing surface of the valve seat. However, because of the limitations of its own structure, the tightness of the butterfly valve is worse than that of the globe valve. However, the globe valve and the butterfly valve belong to two different types of valves, and the simple comparison of the sealing is inappropriate, and the working environment for the two valves is different.

Globe valve: simple structure, easy manufacture and maintenance, good adjustment performance, widely used in various media in the pipeline. However, the direction of the fluid changes when it passes through the stop valve, so the resistance is larger, and it is not suitable for pipelines with large viscosity, suspended substances and easily crystallized materials, and it is not suitable for the valve of the vent valve and the valve of the low vacuum system. Stop valves are widely used in various pressurized fluid lines, and are also commonly used in steam and compressed air lines. The globe valve is a commonly used cut-off valve, mainly used to connect or cut off the medium in the pipeline, generally not used to regulate the flow rate. The globe valve is suitable for a wide range of pressure and temperature, but it is generally used for medium and small caliber pipelines.

Butterfly valve: a simple structure regulating valve. Because the butterfly valve should not be closely matched with the pipe wall, it is only suitable for regulating the flow rate, and can not be used to cut off the pipeline, which is often used to regulate the flow rate of the pipeline conveying air and smoke. The butterfly valve is a valve that uses the circular butterfly plate rotating with the valve stem as the opening and closing part to realize the opening and closing action. Butterfly valves are mainly used with truncation valves, and can also be designed to have the function of adjustment or truncation and adjustment. At present, butterfly valves are used more and more in low pressure medium and large diameter pipelines.