CDC Mobile Water Supply 2025 – 400 Free Practice Questions to Pass the Exam

Gate valves are particularly suited for large diameter lines due to their design and functionality. Their primary purpose is to provide a straight-line flow of fluid with minimal pressure drop. This feature is essential in large-scale systems because it allows for efficient flow, which is crucial in applications involving substantial volumes of water supply.

Additionally, gate valves are designed for fully open or fully closed positions, which minimizes wear over time compared to other valve types that may throttle flow. This design helps to ensure longevity and reliability in large diameter installations often found in water distribution systems.

While ball valves can also be used in larger systems, they may not be as effective or cost-efficient as gate valves in certain applications, especially where only complete on/off operation is needed. Globe valves, on the other hand, are typically used for throttling and controlling flow rather than for isolation, making them less ideal for applications where large volumes are involved. Check valves are designed to prevent backflow rather than regulate or control water flow in a straightforward manner. Thus, their function does not align as closely with the needs of large diameter lines as that of gate valves.