... you require. b) Disc: ductile iron, cast iron, stainless steel, carbon steel, Al bronze or other materials you require. c) Seat ... : EPDM, NBR, PTFE, VITON d) Stem: Carbon steel, SS304, SS416, SS4316) Working temperature: -10.C- 120.C ... life without leakage Company Profile: We, Tianjin Tanggu Tianshun Valve Co., Ltd., have manufactured butterfly valves for more than 10 years. We ...