working principle
A butterfly valve is a type of valve that adjusts the flow of medium by opening or closing it by turning back and forth roughly 90 degrees. In addition to its straightforward design, small size, light weight, low material consumption, easy installation, low driving torque, and quick operation, the butterfly valve also performs well in terms of flow regulation while also having good closing and sealing qualities. one of the fastest types of valve. The use of butterfly valves is common.

Its uses continue to diversify and increase, and they are shifting toward high temperature, high pressure, large diameter, high sealing, long life, outstanding adjustment characteristics, and multi-function of a valve. It now has a high level of dependability and other performance characteristics.

The functionality of butterfly valves has improved thanks to the use of chemically resistant synthetic rubber. Since synthetic rubber has the qualities of corrosion resistance, erosion resistance, stable size, good resilience, ease of forming, and low cost, synthetic rubber with various properties can be chosen in accordance with various application requirements to satisfy the working conditions of butterfly valves.

Since polytetrafluoroethylene (PTFE) has a strong resistance to corrosion, stable performance, resistance to aging, low coefficient of friction, ease of shaping, and stability of size, its overall performance can be enhanced by filling and adding suitable materials to achieve better strength and friction. Synthetic rubber has some drawbacks, but materials for butterfly valve sealing that have a lower coefficient get around them. In order to improve the performance of butterfly valves, high molecular polymer materials, such as polytetrafluoroethylene, and their filling modified materials have been widely used. It has now been upgraded, and a butterfly valve has been produced with a larger temperature and pressure range, dependable sealing performance, and a longer useful life.

Metal-sealed butterfly valves have advanced significantly in order to fulfill the demands of industrial applications such as high and low temperature, strong erosion, and extended life. Metal-sealed butterfly valves have been extensively used in industrial fields such as high and low temperatures, strong erosion, and long life thanks to the application of high temperature resistance, low temperature resistance, strong corrosion resistance, strong erosion resistance, and high-strength alloy materials. In order to advance butterfly valve technology, large diameter (9–750mm), high pressure (42.0MPa), and wide temperature range (-196–606°C) butterfly valves first arose.

The butterfly valve has a little flow resistance when it is fully opened. Butterfly valves are frequently used in the field of large-diameter regulation because they are capable of delicate flow control at openings between 15° and 70°.

The majority of butterfly valves can be utilized with media that contains suspended solid particles since the butterfly plate moves in a wiping motion. It can also be utilized for granular and powdery media, depending on the seal’s strength.

Butterfly valves are useful for controlling flow. When choosing a butterfly valve, it is important to fully consider the impact of the pressure loss on the pipeline system as well as the strength of the butterfly plate to withstand the pressure of the pipeline medium when it is closed because the pressure loss of the butterfly valve in the pipe is relatively large, roughly three times that of the gate valve. The operating temperature of the elastic seat material at high temperatures must also be taken into account.

The butterfly valve has a short structure and a low overall height. It opens and closes quickly and has good fluid control properties. Making large-diameter valves is best suited to the butterfly valve’s structural design. The most crucial step in choosing a butterfly valve that will function properly and effectively when used to control flow is to choose the right type and specification.

Butterfly valves are typically advised for use in throttling, regulating control, and mud media where a short structural length, quick opening and closing speed, and low pressure cut-off (small pressure difference) are needed. Butterfly valves can be used with abrasive media, reduced-diameter channels, low noise, cavitation and vaporization, a tiny amount of atmosphere leakage, and double-position adjustment. Throttle adjustment when working under unusual circumstances, such as when tight sealing, extreme wear, extremely low temperatures, and so forth.