During the renewal and renovation of urban underground pipe networks, ball valves are often installed at key nodes of pipeline sections to perform isolation and on-off functions.

In the secondary water supply renovation of old residential communities, constructors usually carry out sectional construction. Large-diameter ball valves are first installed at predetermined positions as isolation devices. The construction then proceeds by hot tapping and sectional switching to minimize disruption to residents’ water supply. The same applies to gas pipe network renewal. The layout of sectional isolation valves directly determines the gas outage scope and operation duration during emergency repairs.

In heating and fire protection piping systems, ball valves feature fast opening and closing, facilitating prompt medium shutoff under accident conditions. Growing demand for zonal metering and independent control has increased the adoption of ball valves fitted with electric actuators and capable of valve position signal feedback in new projects.

Engineers remind that buried ball valves require attention to valve body anti-corrosion and operating well waterproofing. Valves that remain stationary for long periods should be opened and closed regularly to inspect sealing performance and prevent seizure or internal leakage. What seems to be a simple switch operation relies on proper selection, standardized installation and routine maintenance working together.