Hengshui Runfeng Gas Equipment Co., Ltd is one of the earliest gas pressure regulator manufactures in China We will keep committed to marketing competitively priced, quality gas equipment. AQ series gas pressure regulator which was researched and developed under the common efforts of the Hengshui Runfeng Gas Equipment Co., Ltd and Beijing Public Utilities Board Institute have outstanding function (stable performance,wide inlet pressure 1~8bar ) and suitable for pipe network of medium-low pressure. Our suppliers of important parts of regulator (governor) are also the leading enterprises in China. - Valve body was machining by DMG 5 axis machine center in first class machining precision. - Diaphragm was provided by Shanghai Rubber 4th Factory Institute who is also the supplier of American Meter Company, Emerson, Tartarini, etc..