Which type of valve operates similar to a diaphragm valve?

The correct answer is the globe valve, as it operates under principles similar to those of a diaphragm valve. Both types of valves are designed to control the flow of fluid by using a movable element that can either obstruct the flow or allow it to pass through. In a globe valve, the flow is directed through a spherical body which contains an internal baffle, creating a path that the fluid must navigate. The valve's closure member, typically a disc, moves away from or towards the seat to adjust the flow, functioning akin to how a diaphragm flexibly opens or closes an orifice to manage the flow of liquid.

Diaphragm valves utilize a flexible membrane (the diaphragm) that moves up or down to either block or allow fluid to pass, similarly providing a precise control over fluid flow and minimizing the chances of leakage. This design enables both valve types to maintain a tight seal and manage flow effectively across varying pressure conditions.

Understanding the function and mechanics of globe valves is critical since they are widely used in applications where flow regulation is essential. Their ability to provide controlled throttling makes them suitable for a variety of functions in a water distribution system.