Electric butterfly valves (center line, double eccentric, triple eccentric, etc.) are driven by electric actuators. It is used to realize adjustment, fault cut-off, opening and closing in harsh environments, and remote control functions. The main connection methods are flanges and clamps, and the sealing forms include rubber seals and metal seals. The electric butterfly valve controls the switch of the butterfly valve through the power signal, and can be used as a shut-off valve, control valve and check valve in the pipeline system. It is also equipped with a manual control device, once a power failure occurs, manual operation can be used temporarily.