Profile: Zhejiang Hengtong Valves Co.,Ltd specializes in the production of butterfly valves. We offer a wide range of varieties and specifications including butterfly valves of three-dimensional eccentricity metal hard packing and soft packing, gas butterfly valves, high and medium temperature ventilating butterfly valves and strobes. We follow IS09001 quality management system. Our products include three-dimensional eccentric hard-weld seal butterfly valve, hydraulic slow closing check butterfly valve, flange connection plug valve and water seal valve.