The butterfly valve is also called a flap valve. As its name, its key component is like a butterfly facing the wind and spinning freely. The disc of the butterfly valve is a disc that rotates around an axis in the valve seat. The size of the rotation angle is the opening and closing degree of the valve.
The structure of butterfly valve
The butterfly valve is mainly composed of valve body, valve stem, bearing, sealing device, operating mechanism and accessories.
The working principle of butterfly valve
The butterfly valve which is opened and closed by rotating the valve stem and driving the butterfly plate to rotate. In the cylindrical channel of the butterfly valve body, the butterfly plate which is like a disc，rotates around the axis, mainly rotating the butterfly plate 90° to control the flow. When the butterfly plate reaches 90°, the valve is in a fully open state. And at the same time, the angle of the butterfly plate can be changed to adjust the medium flow. It is generally installed in the diameter direction of the pipeline. The butterfly valve and the valve stem themselves cannot be locked by themselves. So as to adjust the flow effectively, a worm gear reducer must be installed. The butterfly valve equipped with a worm gear reducer not only makes the butterfly valve self-locking, but also changes the operating performance of the butterfly valve and adjusts the medium flow more accurately.
LVD butterfly valve advantages
- When the butterfly valve is fully opened, it has a small flow resistance. When it is opened between about 15° and 70°, it can also perform sensitive flow control. So,butterfly valves are widely used in the field of large-caliber regulation. Because the movement of the butterfly valve butterfly plate is wiping, most butterfly valves can be used for media with suspended solid particles. Depending on the strength of the seal, it can also be used for powdery and granular media.
- Butterfly valves are suitable for flow regulation. Since the pressure loss of butterfly valves in the pipe is very large, maybe three times that of gate valves, when we select butterfly valves, the influence of pressure loss on the pipeline system should be fully considered, and the strength of the butterfly plate to withstand the pressure of the pipeline medium when closed should also be considered. In addition, the limitation of the working temperature of the elastic valve seat material at high temperature must also be considered.
- The structural length and overall height of the butterfly valve are very small, the speed of opening and closing is fast, and it has good fluid control characteristics. The structural principle of the butterfly valve is most suitable for making large-diameter valves. When the butterfly valve is required to control the flow, the most important thing is to select the specifications and types of the butterfly valve correctly so that it can work appropriately and effectively.
Through the introduction of the structure and working principle of butterfly valve, you have a preliminary understanding of butterfly valve. If you want to know more about butterfly valve, you can contact us via WhatsApp or Email.
