The distinguish between butterfly and ball valve
Butterfly valves and ball valves are both types of quarter-turn valves used to control flow in pipelines. Here are the main differences between the two:
Construction: A butterfly valve has a disc that rotates on a shaft in the center of the valve body. The disc can be made from metal or a flexible material, such as rubber or plastic. In contrast, a ball valve has a spherical ball with a hole in the center. The ball rotates within the valve body to control the flow.
Operation: Butterfly valves are operated by rotating the disc a quarter turn (90 degrees) to open or close the valve. Ball valves are operated in the same way, by rotating the ball a quarter turn. However, the ball valve has a lever or handle that is perpendicular to the flow direction, while the butterfly valve has a lever or handle that is parallel to the flow direction.
Flow control: Butterfly valves are typically used for moderate flow control, while ball valves are more suitable for precise flow control.
Pressure and temperature: Butterfly valves are suitable for low to medium pressure applications and moderate temperature ranges. Ball valves are suitable for high-pressure and high-temperature applications.
Sealing: Butterfly valves can have problems with sealing due to the design of the disc. In contrast, ball valves have a tight seal due to the design of the spherical ball.
Overall, the choice between a butterfly valve and a ball valve will depend on the specific application, pressure and temperature requirements, flow control needs, and budget.
