YANFENG was founded in 2008 and is located in Hangzhou, Zhejiang, China. It is a professional valve R&D and manufacturing enterprise. The company's factory and auxiliary buildings cover an area of over 20,000 square meters, equipped with more than 60 precision CNC lathes, as well as specialized testing instruments including safety valve test equipment, ultrasonic thickness gauges, spring tension-compression testers, pressure test pumps, and hardness testing devices. YANFENG has obtained GB/T19001-2008 quality management system certification, passed EU CE certification in 2009, and obtained the Special Equipment Safety Accessory Manufacturing License in 2012. Its products are widely used in fields such as air compressors, boilers, pressure vessels, pipeline equipment, and power station equipment. The core main products include safety valves, check valves, and ball valve series.