• lug & wafer butterfly valve
    knowledge,  other valves,  sanitary butterfly valves

    Two Basic Types of Butterfly Valve: Lug & Wafer

    About butterfly valve Butterfly valves have been around for a long time and have been used more and more widely in various industries since the 1930s when they first came out. Butterfly valves are usually made of cast iron and their name is based on the function of their discs. There are several different types of butterfly valves, but there are always two basic types of butterfly valves — lug and wafer. Butterfly valves are classified as “quarter turn” valves. The valve can be opened or closed by rotating the metal disk of the butterfly valve a quarter turn. When the butterfly valve is fully open, the fluid is allowed…

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    Different Subtypes of Butterfly Valves

    Over the years, butterfly valves have become increasingly popular due to the thin profile between their flanges. The butterfly valve weighs less than other valves and has a smaller footprint and lower initial cost. A butterfly valve is a flow regulating disc valve in which the obturator rotates about an axis that is at right angles to the direction of flow. In other words, the butterfly valve consists of a disc in which a rod is constructed by an intermediate or additional offset. When opened, the valve flaps 90 degrees in the valve bore, in line with the direction of fluid flow, and the fluid passes smoothly; the butterfly valve…

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    Why is it called “butterfly valve”?

    Among all types of valves, there is a particular one with the most beautiful name—the butterfly valve. How did the name come from? In answering this question, we could use analogy. For example, the ball valve looks like a ball, so can we guess that the butterfly valve looks like a butterfly? Well, it seems a little funny, but I have to say: “Bingo, right answer!”   The butterfly valve is a regulating valve with simple structure, and it can be used for switching control of a low pressure pipeline medium. The opening and closing member (valve or disc) of the butterfly valve is a disc that rotates around the…