D341X flanged Butterfly Valve Materials of main parts NO. PART MATERIALS 1 BODY CAST IRON+NBR/EPDM DUCTILE IRON+NBR/EPDM 2 BUSHING LUBRIZED BRONZE F4-PTFE 3 SHAFT STAINLESS STEEL 4 DISC DUCTILE IRON, AL-BRONZE, STEEL 5 TAPER PIN STAINLESS STEEL 6 0-RING RUBBER 7 KEY STEEL 45