The primary function of the gate valve is to isolate flue gas in industrial boilers, acting as a protective barrier for staff working on desulfurization towers. The gate valve can be installed at the original flue gas location, clean flue gas location, or bypass flue duct. As an environmental protection equipment, the gate valve not only boasts practical functionality but also requires guarantees in performance, structure, and quality.

The domestic economy has experienced a remarkable growth rate, primarily due to the development of heavy industries and other sectors, which has boosted our overall strength. However, the corresponding consequence is environmental degradation, especially in certain areas of our country, where excessive coal burning and harmful gas emissions have caused environmental issues, leading to air pollution and acid rain. These environmental problems have had a significant impact on the local ecosystem and people's production and living conditions. As a result, environmental concerns will continue to expand across all regions, and the urgency of addressing them cannot be overstated. However, as a developing country, coal, an important fuel, cannot be separated from our future development process.

Sulfur dioxide and nitrogen oxides produced by coal combustion pose serious threats to human health and the ecological environment. Consequently, how to improve China's environmental issues has become a widespread concern among the Chinese people. While life must go on and production cannot halt (suspension of production is only a temporary measure), it is essential to enhance and improve the research and development of environmental protection equipment. The plate valve, having undergone four generations of technological advancements, has been maturely applied in industries such as chemicals, papermaking, oil, electricity, and coking. In some respects, it has helped control China's environmental problems, thereby playing a positive role in the environmental protection cause.