China Supplier Warehouse 20 Ton Double Girder Overhead Crane

Electric overhead bridge crane for walking on a roof is composed of box type bridge frame, lifting trolley, crane traveling mechanism, and electrical system. It is an excellent choice where high speeds and heavy service are required. As the widely used hoisting machinery currently especially is suitable for working at warehouses and freight yard and other department it is prohibited to use the equipment in the combustible, explosive or corrosives environment.

It is rely on the bridge frame along the workshop orbital direction moving longitudinal, the trolley along the main beam direction moving transverse and the hook lifting movement to work. High lifting capacity of this crane is designed with two hooks that means two independent sets of hoisting mechanism. The main hook is used to lift heavy objects while the  auxiliary used to lift light objects,the auxiliary can also be used for collaborative main hook tilting or tipping the material. However, don’t use the two hooks to lift at the same time when goods weight is over the auxiliary rated capacity.

Double girder overhead crane is composed with double girder frame, crane travelling end truck, and the top running trolley with lifting and travelling device. The cranes are equipped with frequency inverter, which makes the crane speeds adjusted under 10 grades speeds. It could move very slow which makes it possible to do very accurate works.

This model overhead crane is designed under GB regulation, passed ISO, CE certification.
The crane lifting and travelling speeds are steady and accurate.
New design also makes the crane lifting higher.

Main Features:
1. Heavy Duty and High Efficient;
2. Suitable for any environment ( High Temperature, Explosion Proof and so on);
3. Long Life Span: 30-50years;
4. Easy for Installation and maintenance;
5. Reasonable structure and strong rigidity;
6. The speed can be frequency inverter speed control;
7. Control method is cabin control or remote control;
8. Depending on lifting cargo, crane can be equipped with hanging beam magnet or magnet chuck or Grab or C hook;