... for DN50 and aboveGeneral features and options for customized brass ball valves: 1. Brass body material: CuZn39Pb2, CW617n, CW614n, HPb59-1, HPb57 ... flow, reduced flow5. Ball material: brass, stainless steel, PVC6. Sealing: PTFE, EPDM O-Rings7. Pipe connections: BSP/ISO/NPT/NPSM thread; welding, flange8. Threaded ... BodyCW614n, CW617n, Lead Free, DZR10Ball SeatPTFE PN40 BSP Threaded Brass Ball Valve