Portal Slewing Crane


Portal Slewing Crane

Smooth And Safe Operation

16 – 50T

Rated Hoisting Capacity

9.5/30 – 12/40m


10.5 – 12m

Wheel Base


Full automatic tracking for spreader slewing

Slewing angle of the crane and position of the slewing motor is sent to the spreader by real time control and intelligent compensation algorithm. The spreader will move in the same angle speed in opposite to counteract the angle of crane slewing.

Grab track recording

Data of the grab in one or more cycle (wire rope lowering distance, slewing angle, luffing angle, wire rope lowering distance, accelerating and decreasing time) are optimized based on the recorded data for the grab to repeat the movement automatically.

Over hoisting prevention for hook

When the hook is lifted to the limit height, control relays enable control box on the buzzer alarm. Ascending motion stops and only descending is allowed. This device protects the lifting mechanism effectively, ensuring high efficiency safe protection.

Speed protection for hoisting mechanism

Acceleration of hoisting points are calculated and sub protection is set for our crane to predict the over speed trend and avoid the obvious crush. Hardware over speed switch is applied for double protection.

Energy recycling technology

Active inverter technology is applied to transfer the stored dynamic power and potential power into electricity and be recycled to the grid. Moreover, it can resist the pollution to grid from higher harmonic voltage, thus increasing the power factor of the equipment.

Intelligent low voltage capacitor compensation

Full automatic resonance eliminating reactive power compensation device is configured to achieve the average power factor above 0.9 or more, which improves electricity efficiency and reduce wire consumption.

Specs & Compare

Models Rated Hoisting Capacity Radius Wheel Base
MQG1630S Brochure
16T 9.5-30m 10.5m
MQG1633S Brochure
16/25T 9.5-33m 10.5m
MQG2535S Brochure
25/40T 9.5-35m 10.5m
MQG4030S Brochure
40T 9.5-30m 10.5m
MQG4037S Brochure
40T 11-37m 12m
MQG4040S Brochure
40T 12-40m 12m
MQG4043S Brochure
40T 12-43m 12m
MQB4535S Brochure
45/50T 12-35m 10.5m

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