Gate Valves & Industrial Usage Gate Valves DN2800 gate valve, like the world's largest one used in the Texas Integrated Pipeline (IPL) project, is a massive industrial valve used for large-diameter water supply systems to control large volumes of water with minimal pressure drop when fully open. These valves, manufactured by companies like Blackhall Engineering, are crucial for mega-pipeline projects that require long-term, sustainable water distribution and ensure critical infrastructure is sustainable for decades.