Hebei tongli automatic control valve co., LTD., was founded in 1995, the company headquarters is located in Siying development zone of Botou city, Hebei province. The company is a development, production, sales in one of professional manufacturers. Our products have obtained 32 national patents and passed ISO9001:2000 second quality system certification, special equipment license of the People's Republic of China, the occupational health and safety management system certification, environm.....

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Yangzhou Sunzo Spring Ind. Co., Ltd was located in Yangzhou which is the base for manufacturing and researching springs. As a professional manufacturer and exporter in springs, Sunzo spring focus on researching and developing in  springs since the company was established in 1998. The company has one springs actory, one forging products factory, and an other trade company. Our products includes Belleville spring, disc spring DIN 2093, spring washer DIN 6796, valve disc spring, heat resis.....

we are one of the leading manufacturers of Ductile iron pipe,Ductile Iron Pipe Fittings , Flange Adaptors , Couplings , Dismantling Joints ,Valves , Manhole Covers , Steel Flanges ,Carbon steel pipe fittings,malleable iron pipe fittings,Rubber O rings, Fasteners . Pumps , Motor Shells and other Castings and Forgings according to different standards such as ISO2531, EN545,EN14525, ISO4422, ISO7005,DIN3352, BS5163, DIN3202, BS2494, BS4504, EN124 and other relevant ISO, EN, BS , DIN, ANSI,A.....