Double Flanged Rubber Lined Butterfly Valve 1.Investment casting 2.Reasonable price to get the order 3.Professioal OEM Double Flange Butterfly Valve: SizeDN40 ... , foodstuff, oil etc.Working Temperature:-10°C~150°COperator:Suitalbe for handles(dn50~300), gear operators, electric and pneumatic control actrators ... GB, ASME, ANSI, API, BS, DIN, JIS etc. double flanged rubber lined butterfly valve