Ka023 3/4-wing revolving door not only elegant but also economical and practical. Anti-strike+ anti-squeeze+ instant-reaction safety function. Function: safety functions 1. Lock up: the door can find locking-up position automatically and lock up manually. 2. Fire alarm: ka023 automatic door has pre-fixed a 3-chip signal wire as the fire-alarming control port. When there is fire alarm, the panic breakout comes into operation automatically enabling push-and-go. 3. Anti-squeeze: when the anti-squeeze sensor touched, the door will stop immediately. When the sensor at entrance detects pedestrian, the door will stop immediately. 4. Anti-strike: when the anti-strike sensor touched, the door will stop immediately. 5. Instant-reaction: when the resistance to the revolving wing is bigger than the preset parameter (adjustable), the door will stop immediately. 6. Handicap: press the button to enable the door revolving at low speed to facilitate the disabled.