Application of Extra-Large Diameter Butterfly Valves in the Circulating Water System of a Large Coal-Fired Power Project

For this large coal-fired power project, the circulating water system serves as the vital lifeline of the plant’s cooling operations. The system involves massive pipeline diameters and immense flow rates, operating in an environment characterized by high humidity and high corrosivity; consequently, the valves require exceptional reliability, sealing performance, and flow capacity. Traditional gate valves are unsuitable for such conditions, as they are bulky and expensive, while also imposing high flow resistance and energy consumption. The project utilized multiple batches of our extra-large diameter (DN3200) electric butterfly valves. Featuring a low-flow-resistance design, these valves ensure adequate water flow while effectively reducing pumping energy consumption. The valve bodies incorporate multi-layer anti-corrosion treatments and reinforced structures, enabling them to withstand the highly humid and corrosive circulating water environment with ease. To meet the demands of modern, highly automated power plant operations, each valve is equipped with a precise, reliable electric actuator that supports intelligent remote control and seamless integration with the plant’s Distributed Control System (DCS), allowing for real-time, accurate regulation of cooling water flow. Since commissioning, the circulating water system has operated stably and efficiently—free from jamming or leakage—ensuring reliable continuous full-load operation for the power generation units and earning unanimous acclaim from the project owner for our products.