Carbon Fiber Front Sandboard,Refit Carbon Fiber,Carbon Fiber Front Leaf Plate,Rear Spoiler Tail Lip Hunan Province Yuhang Auto Parts Co., Ltd , https://www.yuhangparts.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