... resistant. ISO, API, ASTM, ANSI, DIN, BS,JIS Wafer Type Fluorine Lined Butterfly Valve:Features:1) Working Temperature: -15~150*C2 ... Steel.Seat: PTFE, NBR.Bushing: PTFE, Bronze.O-Ring: EPDM, Fluorine RubberStandard:1) Design Standard: MSS SP-67, API609, EN593.2 ...