This series of pneumatic diaphragm single seat regulating valve is based on the introduction, digestion and absorption of the advantages of the latest generation of regulating valve products in the world. It applies domestic mature design and manufacturing experience and combines the actual use and maintenance needs of users on site. The new generation of special products adopts IEC international standards. The installation height is reduced by 30%, the weight is reduced by 30%, and the flow coefficient Kv value is increased by 30%, saving material and energy. It has the advantages of reliable operation performance, accurate flow characteristics, large adjustable range, small valve seat leakage and stable operation.