... ISO,CE,API,ABS,WATERMAR History:17 years (Since1994) 3-way butterfly valve/directional valveSize Range: DN15~DN3500Class Range: 150LB-900LB/ ... Products: We can produce gate, globe, check, ball and butterfly valves with the materials of ductile iron, carbon steel ... larger number of advanced mechanical facilities and inspecttion equipments have been employed in Shanghai Huatong Valve Co., Ltd. Based on ...