Founded in 1990, Hebei Zhonghai Ship Parts Manufacturing Co., Ltd. is an enterprise specialized in research, development, production and sales of internal combustion engine intake and exhaust valves, Our products are widely used in YANMAR,DAIHATSU,MAN B&W,SKL,SULZER,AKASAKA,UEC,HANSHIN. PIELSTICK,Wartsila etc marine diesel engine.