Lug type metal to metal renewable seat butterfly valve with special material 5A Material:Body:5A; Disc: F53, Stem: F53+STL Nominal Pressure:CL150 Nominal Diameter:4″/6″ End Connection:Lug Operation:Worm Gear Working Temp:-29℃~315℃ Test/Inspection:API 598/ISO 5208 PS:We can manufacture valves as customers’ requirements.