Small Road Roller,Road Roller,Road Roller Machine,Vibratory Road Roller Xuchang Jingrui Machine Manufacturing Co., Ltd. , https://www.jingruisteelbarcutter.comAbstract: This paper introduces the potential problems of the fuel gas manifold pressure control valve of the heating furnace in the air-open type (FC). It is more reasonable to change the gas-off type (FO). Key words: furnace; fuel gas; manifold; pressure control valve; gas off / gas open