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As a common type of valve, it plays a crucial role in various pipeline systems. Its main function is to open and close the flow of fluids, ensuring smooth passage or complete blockage of fluids. The design and operating principle of gate valves give them a series of unique features in the field of fluid control, which not only improve their efficiency but also highlight their importance in many industrial fields. One of the significant features of gate valves is their low fluid resistance When the knife gate valve is fully open, fluid can pass through the valve channel in a straight line with almost no obstruction. This design makes gate valves particularly suitable for situations that require high flow rates, such as water supply, drainage systems, and liquid transportation in industrial production processes. Compared with other types of valves, gate valves have significant advantages in the flow efficiency of fluid channels. The sealing performance of the gate valve is good Gate valves typically use flexible or metal seat seals to effectively prevent fluid leakage. This feature enables gate valves to maintain good sealing performance in high-pressure and high-temperature environments, making them suitable for pipeline systems in industries such as oil and gas. In addition, the opening and closing stroke of the gate valve is relatively short, which can quickly achieve complete closure or opening, thereby avoiding the reverse flow of fluid and potential risks to the system. The durability of the gate valve is also a major advantage Usually, gate valves are made of metal materials such as cast iron, stainless steel, etc. These materials are not only corrosion-resistant, but also able to withstand high working pressures. The structure of gate valves is simple, and maintenance and upkeep are relatively easy, which enables them to maintain good working condition during long-term use. In addition, gate valves can still perform well even when frequently opened and closed or not used for a long time, demonstrating excellent durability. In addition to the above characteristics, the importance of gate valves is also reflected in their widespread application in industry and daily life ---h2 Gate valves are widely used in various fields such as water treatment, petrochemicals, and heating systems, undertaking important fluid control tasks. In thermal power plants, gate valves are used to control the flow of cooling water; In chemical plants, gate valves are used to regulate the transportation of various chemical raw materials. Its reliable operational performance and stable sealing effect ensure the safety and economy of the system. In summary, gate valves have become indispensable components in industrial pipeline systems due to their low fluid resistance, good sealing performance, and strong durability. With the advancement of technology and the continuous improvement of industrial demand, the research and application of gate valves are also deepening, demonstrating their broader development prospects. Therefore, a deep understanding of the characteristics of gate valves and their importance in the industry not only helps to enhance the scientific nature of engineering design, but also provides guarantees for the safe operation of related industries.gate16 butterfly valve20 butterfly valve>ng>14 18 butterfly valvebutterfly valveanti ram bollards valve ，