Zhanjiang Double Flow Main Heat Exchanger Manufactruring Co.,Ltd.,It has the most special and advanced automatic production line,automatic test instrument and equipment. It is a leading overseas-funded enterprise in this industry. Spercializes in producing wall mounted gas boiler heat exchanger,domestic water heater exchanger and all kinds of larg and middle gas boiler's second reclaim heat exchanger with research,development,desing,productin,sale and service as an organic whole. The enterprise has obtained ISO9001 AND ISO14001 certificates.