Product knowledge

Product knowledge

What is the difference between globe valve and butterfly valve?

Dec-22-05
What is the difference between globe valve and butterfly valve?
The globe valve relies on the pressure of the valve stem to make the sealing surface of the valve flap and the sealing surface of the valve seat fit closely together and stop the flow of the medium. The globe valve only allows the medium to flow in one direction and is directional when installed. The stem of the globe valve has a relatively short opening or closing stroke and has a very reliable shut-off function.
The difference between globe valve and butterfly valve : 
1 . The adjustment performance of globe valve is better than that of butterfly valve, and the adjustment performance of butterfly valve is worse, generally used in the occasion that only needs to switch.
2 . On the other hand, the price of globe valve is higher than that of butterfly valve.
3 . Compared with the gate valve, simple structure, easy manufacturing and maintenance, good adjustment performance, widely used in a variety of media transmission pipeline. But the fluid through the shut-off valve has a change in direction, so the resistance is large, should not be used for viscosity, containing suspended substances and easy to crystallize material pipeline, but also not for the venting valve and low vacuum system valves. Shut-off valve is widely used in a variety of pressurized fluid pipeline, in steam and compressed air pipeline is also commonly used shut-off valve. Shut-off valve is a common cut-off valve, mainly used to connect or cut off the medium in the pipeline, generally not used to regulate the flow. Globe valve applicable pressure, temperature range is large, but generally used in small diameter pipeline.
4 . Butterfly valve: butterfly valve, also known as flap valve, is a simple structure of the adjustment valve. Because the butterfly valve is not suitable for close cooperation with the pipe wall, only for regulating the flow, can not be used to cut off the pipeline, commonly used in the transport of air and flue gas pipeline to regulate the flow. Butterfly valve is a valve that uses a round butterfly plate rotating with the stem as the opening and closing member to achieve opening and closing action. Butterfly valve is mainly used as a cut-off valve, but can also be designed to have the function of regulation or cut-off and regulation. At present, butterfly valves are being used more and more in low pressure, medium and large diameter pipelines.