... and ISO certificate Standard:DIN,BS,API,JIS,MSS etc Electric actuator butterfly valveFeature:1) Standard for face to face: DIN ... without leakage Company Profile: We, Tianjin Tanggu Tianshun Valve Co., Ltd., have manufactured butterfly valves for more than 10 years. We ... choose the operation mode like manual ( lever, handweel or gearworm), electric and pneumatic actuator and so on. Our brand is TST ...