Electric butterfly valves belong to a variety of electric valves and electric regulating valves. Electric butterfly valve connection methods mainly include: flange type and wafer type; electric butterfly valve sealing forms mainly include: rubber seal and metal seal. The electric butterfly valve controls the switch of the butterfly valve through the power signal. The product can be used as a shut-off valve, control valve and check valve for piping systems. With manual control device, once power failure occurs, it can be temporarily operated manually without affecting the use.