... foodstuff, oil etc.Working Temperature:-10°C~150°COperator:Suitalbe for handles(dn50~300), gear operators, electric and pneumatic control ... .Products;We can produce butterfly valves, check valves, gate valves and so on with the materials of ductile iron, carbon ... and manufactured in accordance with the standards of GB, ASME, ANSI, API, BS, DIN, JIS etc. double flanged rubber lined butterfly valve