Butterfly Valves - Their Types, Uses, and Functions
Butterfly valves are used to start, stop or regulate the flow of gases or liquids. The valve is named a "butterfly valve" because it looks like a butterfly. The valve may use manual or automatic actuators. Smaller-sized china valves have manual actuators, while the bigger ones use automatic actuators. Butterfly Valves are used for : To regulate the flow. To isolate the flow. To prevent backflow. Butterfly valves are made of 4 main parts : Body: It's the part that fits between the two pipes Seat: Either bonded to the body or locked down. Disk: It controls the flow of media through the valve. Stem: It connects the disk inside to the handle outside We can classify butterfly valves according to closure design, piping connection design, seat material, and actuation method. According to the disc closure design, two variations exist, namely concentric butterfly valve and eccentric butterfly valve. According to piping connection design, we have lug type, wafer type, flanged,