... 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 7) Long working life without leakage Company Profile: We, Tianjin ... choose the operation mode like manual ( lever, handweel or gearworm), electric and pneumatic actuator and so on. Our brand is TST ...