Comparative analysis of globe valves and butterfly valves in flow regulation performance

In the field of industrial and civil fluid control systemsshut-off valveand butterfly valves are two common types of valves. They have their own advantages in flow regulation, which one is more effective, need to be considered in conjunction with the specific application environment.

Globe valves adjust the distance between the valve flap and the valve seat through the up and down movement of the valve stem, so as to achieve the purpose of regulating the flow. Its advantage lies in the high precision of adjustment, can accurately control the flow area, to realize the fine flow regulation. In addition, the sealing performance of the globe valve is superior, and can effectively prevent fluid leakage when closed. However, the fluid resistance of the globe valve is large, and the torque required for opening and closing is also large, which makes the operation more laborious, and the range of flow adjustment is relatively narrow, which is not suitable for rapid adjustment of large flow.

Butterfly valve, on the other hand, changes the flow area by rotating the valve plate. Its structure is simple, small size, light weight, easy to install and maintain. Butterfly valve has small fluid resistance, suitable for a wide range of flow regulation, especially for large diameter, large flow pipeline system. However, the adjustment precision of butterfly valve is relatively low, and the flow rate changes are more drastic in small openings, making it difficult to realize precise flow control.

Comprehensive view, in the need for precise regulation of flow, high requirements for sealing performance, the flow change range is not large occasions, the globe valve regulation effect is better, such as the chemical production of accurate dosage system. And in the large diameter, large flow, on the regulation of precision requirements of the system, the butterfly valve is more suitable, such as water supply and drainage systems, ventilation systems.