... water source projects, urban water supply and drainage, sewage treatment, electric power, petroleum, petrochemical, heat supply, shipbuilding, medicine and metallurgy ... C~150°COperator:Suitalbe for handles(dn50~300), gear operators, electric and pneumatic control actrators.Products;We can produce butterfly valves ... of GB, ASME, ANSI, API, BS, DIN, JIS etc. various high quality Butterfly valve