What is the primary purpose of a gate valve in a water system?

The primary purpose of a gate valve in a water system is to isolate sections of the system. Gate valves are designed for on/off service, allowing for the complete shut-off of water flow in a pipeline when the valve is fully closed. This functionality is crucial during maintenance or repair work, as it enables specific sections of the system to be isolated without disrupting the entire water supply.

While regulating flow, preventing backflow, and providing pressure relief are important functions in various systems, these tasks are typically managed by other types of valves, such as globe valves for flow regulation, check valves for backflow prevention, and relief valves for managing pressure. Gate valves excel in their primary role of isolation, making them an essential component in water management systems.