PTFE Butterfly Valve PTFE Butterfly Valve Technical Parameter1)Nominal Diameter: DN40-DN1502)Design standard: ... SteelSeat: NBR, EPDM, Heat Resistant EPDM, VITON,Pin: Stainless SteelBushing: PTFE, BronzeRing: NBR, EPDM, VITON DNSizeΦDΦD2ΦD1ΦdNHAF05406535.550843 ... .5F25900300200.52541885.522.5F251000300200.52541885.522.5F301200300200.52952285.522.5 PTFE Butterfly Valve