DQF electric ball valve special electric ball valve for cement factory

When there is no external opening signal (relay signal), the electric ball valve remains fully closed and locked under the action of the working power supply. At this time, the indicating plate is in the fully closed indicating position, and the electric indicating switch signal (relay signal) has no output. . When the opening signal is added, the internal small relay acts, the main motor rotates immediately, and the small gear on its transmission shaft rotates synchronously, driving the large gear, the main shaft and the stainless steel ball to rotate synchronously. After seconds, the valve position is in the fully open position, and at the limit position Under the action of the switch, the motor stops rotating and remains locked. At the same time, the electrical signal indicates that the switch is touched. The switch signal output causes the indicator light in the control room to have a corresponding indication. At this time, the indicator panel is in the fully open indicating position. On the contrary, when the opening electrical signal disappears, the motor immediately reverses. After a few seconds, under the action of the reverse limit switch, the motor stops. At this time, the valve position is fully closed and remains fully closed and locked.