The model of the Tower crane are QTZ25(3508), QTZ31.5(4206),QTZ31.5(4207), QTZ31.5(4208).The main parameter of each model are showed in follow:

(1), Tower crane QTZ25(3508):Its max lifting load is 2.5t,  Its max lifting height is 26/60m,Its Max working range is 35m,  the Lifting speed is 27/13.5m/min,  the Slewing speed is 0.76/0.5r/min,   the Demicking speed is 23m/min,and the power is 380v/50HZ;

(2). Tower crane QTZ31.5(4206): Its max lifting load is 3t, Its max lifting height is 30/90m,Its Max working range is 42m,  the Lifting speed is 51/25.5m/min,  the Slewing speed is 0/0.7r/min,   the Demicking speed is 39/26m/min,and the power is 380v/50HZ;

(3). The main parameter of Tower crane QTZ31.5(4207) and QTZ31.5(4208) are the same to the Tower crane Tower crane.