The special part of the electric ventilating valve is the remote control device of electric drive. Change of positions of wind valve clack can change the wind volume easily and the changed position of wind valve clacks is fed back automatically with output signal. DFD-09 electric operation can control the opening size of the valve to achieve the required wind amount. Nominal diameter: Φ350 mm, Nominal pressure 0.5 kg/m2 Diameter of the valve seat: Φ350, itinerary50 mm actuator Model: DKZ-510, itinerary: 100 mm, spindle thrust: 1,600 kg. Duration 62 S. Power: 220 V50HZ. Power: 360 W.