Hebei Yuehong Zhiji Technology Development 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 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 pres