Reduce bore(RB)Trunnion mounted ball valve forged Duplex stainless steel F51 Material:F51 Nominal Pressure:150# Nominal Diameter:6″/4″ End Sealing:RF Face To Face:ASME B16.10 Working Temp.:-254℃~425℃ Test/Inspection:API598/ISO 5208 End Connection:RF NACE:NACE 0175 PS:We can manufacture valves as customers’ requirements.