PTFE Butterfly Valve PTFE Butterfly Valve Technical Parameter1)Nominal Diameter: DN40-DN1502)Design ... Ductile Iron, Carbon Steel, Alloy AluminumDisc: Plated Ductile Iron, Aluminum Bronze, Stainless Steel, Carbon SteelStem: Carbon Steel, Stainless SteelSeat: NBR, ... EPDM, Heat Resistant EPDM, VITON,Pin: Stainless SteelBushing: PTFE, BronzeRing: NBR, EPDM, VITON DNSizeΦDΦD2ΦD1ΦdNHAF05406535.550843 ...