D971X smart electric butterfly valve using integrated structure, access 220VAC power, can control work, also can add control module, input control signal（4-20mADC or 1-5VDC）for regulating controlling. Strong function, small size, light weight, reliable performance, large flow capacity, to normal temperature、clean media, can use valve plate with soft sealing(like rubber ring、PTFE ring) to reduce leakage(reach 0.01%). Widely used in food, environmental protection, light industry, petroleum, chemical, teaching equipment, papermaking, power and other automatic control systems