What is the effect of a globe valve on water pressure?

A globe valve is specifically designed to control flow and pressure in a water system. When a globe valve is in the open position, it allows water to pass through, but its internal design creates resistance to flow because of the shape of the valve and the mechanism used to open and close it. This resistance causes a drop in pressure as water moves through the valve, as energy is lost due to friction and turbulence.

The significant pressure drop often occurs when the globe valve is partially closed, because the narrowing of the flow path increases velocity and can lead to other effects, such as cavitation or further turbulence. Thus, the primary function of a globe valve is not only to regulate flow but also to cause a measurable decrease in pressure depending on how much the valve is opened or closed.

In contrast, other valve types may not create the same level of pressure drop, or they may be designed primarily to allow maximum flow without significant restriction. However, globe valves are particularly effective for situations requiring precise control over water flow and pressure management, which is why they are commonly used in applications where balancing pressure is critical.