The pneumatic butterfly valve consists of a pneumatic actuator and a butterfly valve. It uses a circular disc that rotates with the valve stem as a shutter to achieve the activation action. These valves are mainly used as shut-off valves, and can also be designed to have adjustment or section valve and adjustment functions. At present, butterfly valves are used more and more on low-pressure large and medium-diameter pipes. Pneumatic butterfly valves are classified into stainless steel pneumatic butterfly valve, hard seal pneumatic butterfly valve, soft seal pneumatic butterfly valve, and carbon steel pneumatic butterfly valve. The main advantages of the valve are simple structure, small size and light weight,…
-
-
Sanitary Butterfly Valves Basics
A butterfly valve is a valve that isolates or regulates the flow of a fluid. The closing mechanism is a disk that rotates. The opening and closing member of a sanitary butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the sanitary valve body to achieve the purpose of opening, closing and regulating. Full opening to full closure of a butterfly valve is usually less than 900. The butterfly valve and butterfly rod themselves don’t have self-locking capabilities. In order to position the butterfly plate, a worm-wheel reducer needs to be installed on the valve rod. Using a worm-wheel reducer not only makes the butterfly…
-
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…
-
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…
-
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 valve…
