In industrial automation control systems, the regulating valve serves as the core component for fluid control, playing a crucial role in precisely regulating flow, pressure, or temperature. Among them, the Chinese pneumatic diaphragm regulating valve, with its simple structure, rapid response, and high safety and reliability, is widely used in industries such as chemical engineering, petroleum, water treatment, pharmaceuticals, and HVAC. In large chemical plants, in the feed return circuits of reactors, or in the dosing systems of water plants, improper selection of the Chinese pneumatic diaphragm regulating valve can lead to reduced control accuracy, equipment damage, or safety incidents. This article will deeply explore the selection points of the Chinese pneumatic diaphragm regulating valve, focusing on the three core elements of drive mode, pressure rating, and applicable medium, to help engineers and purchasers make professional decisions and enhance system efficiency and safety. The keyword "Chinese pneumatic diaphragm regulating valve" will naturally integrate into the content to ensure SEO optimization effects.