How is a butterfly valve operated?

A butterfly valve is designed to control the flow of fluid through a pipe and is operated by turning a handle. When you turn the handle one quarter turn, it rotates a disc or plate within the valve body. This quarter turn action effectively opens or closes the valve, allowing or stopping the flow of the fluid. The operation is straightforward and efficient, making butterfly valves a popular choice in various applications, including water supply and wastewater management.

In contrast, other methods of operation mentioned in the options are not applicable to butterfly valves. Pulling a lever or pushing down on a pedal implies a different mechanism that is not characteristic of how a butterfly valve functions. Twisting and locking into place would suggest a more complex locking mechanism, which is not typical for this type of valve. Understanding the quarter turn operation is crucial for effectively using a butterfly valve in practical applications.