Zhejiang Longcheng Valve Co., Ltd. is specialized in the production of valves and steam traps (drain valves). We boast a long history, advanced techniques, perfect test technology and normalized quality control in order to further the improved system. We have successfully obtained the ISO9001 certificate. The products made by us are widely applicable for different industrial pipelines in petroleum, chemical industry, metallurgy, electric power, military power, paper-making and engineering ...   |