If the fluid in industrial pipelines is compared to a "rushing river", then the valves are like the "divine judges" controlling the water gates. Within the valve family, there is a slender and agile player - the butterfly valve.Because its core component - the valve plate, rotates within the cylindrical valve body, it resembles a butterfly spreading its wings and dancing gracefully, hence the name. Just by rotating 90 degrees, it can instantly complete the transition from "fully open" to "fully closed"!

    The Evolutionary Fantasy of Butterfly Valves How did the butterfly valve, which was initially a crude "iron plate gate", evolve into the industrial giant capable of withstanding temperatures of several hundred degrees Celsius and pressures of hundreds of kilograms?

    Initial appearance: The "windscreen" of the steam engine era In the 18th and 19th centuries, before and after Watt's improvement of the steam engine, engineers attempted to place a rotating metal disc in the pipeline to regulate the air volume and steam flow. However, the processing accuracy at that time was too low, and leakage of water and air was the norm. It could only serve as a rough regulating valve.

    Official Birth: The Invention of Modern Butterfly Valves and the Rubber Polymer Revolution 1930s - 1950s In the 1930s, the modern butterfly valve was officially invented in the United States. By the 1950s, synthetic rubber and polytetrafluoroethylene (PTFE) were developed, and engineers applied them to the valve seat as "sealing gaskets". The soft-sealing butterfly valve was born, finally achieving "no leakage at all"!Evolution and Transformation: The "Intelligence Victory" of the Eccentric Structure 1960s - 1980s Soft rubber is afraid of high temperatures and high pressures, and is prone to wear. To break this limitation, engineers designed double eccentric and triple eccentric structures: positioning the valve shaft and sealing surface to the side, so that the valve plate only contacts the valve seat at the moment of closing. Since then, the all-metal sealed butterfly valve was born, capable of easily handling 600°C high temperatures and harsh working conditions!

    Modern Leap: Intelligent "Butterfly" Dominates the Scene Since the 21st century, thanks to the optimization of fluid dynamics (CFD) and intelligent electric/air actuating devices, the butterfly valve has a volume that is only 1/3 to 1/2 of that of a gate valve of the same diameter, and its weight has also been significantly reduced. It can be found everywhere, from urban water treatment plants and seawater desalination plants to cryogenic liquid nitrogen pipelines at rocket launch sites.

    Why is the engineering industry increasingly fond of "this butterfly valve"? Compared to traditional gate valves (like sliding doors) and globe valves (like screw caps), the butterfly valve has three remarkable features: Lightweight design: For a large valve with a diameter of DN1000 (1-meter diameter), the gate valve weighs 3.5 tons, while the butterfly valve weighs only about 2 tons, saving a significant amount of metal materials and installation space. Swift response: With just a 90° rotation of the wrench or drive shaft, the valve can be fully opened or closed, making it extremely fast for emergency shut-off. Excellent cost-effectiveness: The structure is simple, and in large-diameter pipelines, the cost advantage is unparalleled.