Multi-lifting door, the door body is composed of two shutters or many shutters, selects the counterweight balanced method; Each shutter has two independent steel wires or the chain link lifting; Many shutter linkages, Many lifting ropes are the safety ropes mutually; Rise the steel wire safety coefficient. The door body has against crashes the safety system . When the power cut or the electrical machinery damage, open or closes the the door by hand, the speed by hand or machinery are close; When the electrical machinery damage or the power is cut when it movement , The gate stopped at the position in that time; The door is suitable in the area such as hole is high,  frequent start , bad working conditions or uneasy for the maintenance. Multi-shutters have strong anti-impact ability and safe reliably; Channel door or window on light are available according to customers' requirement . Many shutters moves at the acceleration speed along the parallel rail and arrives at opening or close position in the same time. No matter is electrically operated and is manual, The door can stop at any opening position; When driving chain link accident break, The safety mechanism can prevent the door drop; Start is steady, Reduction impact to the electrical machinery , Extension the electrical machinery service life. Temperature range: - 50 centigrade - +50 centigrade  Opening speed :0.15 - 0.25 m/s.
A. appearance novel, edge and corners clear, strong stability , run stably
B. Use the aluminium or polished steel as door body ,line succinct ,elegance appearance ,to arrive requirement of construction or humanity culture .
C. Use the newest steel runner as the door body runner ,firmly ,durable
D. Use the needle bearing as ground-driven reel ,which can run stably under the great pressure ,also can prevent the ground-driven reel from damaging because of the rusty bearing .
E. Wheel cover has broken the original signal appearance and make the door full and dynamic base on the construction principle and esthetics.