Grab-Type Four-Link Level Luffing Portal Crane
Introduction
Technical Data
Application
Features
Certificate
Inquiry
PRODUCT INTRODUCTION
The Grab-type Four-Link Level Luffing Portal Crane is a premium bulk material handling solution distinguished by its sophisticated four-bar linkage boom system. Unlike single-boom designs, this crane employs a combination of a main boom and a counterweight boom connected through a hinged mechanism, ensuring that the grab maintains precise horizontal movement throughout the entire luffing range. This mechanical level-luffing system delivers superior load stability, reduced power consumption during luffing, and exceptionally smooth operation—making it the preferred choice for high-precision bulk handling applications.
TECHNICAL DATA
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Rated Lifting Capacity (Hook) | 10 – 80 tons | Rated Lifting Capacity (Grab) | 10 – 60 tons |
| Max. Working Radius | 20 – 73 meters | Min. Working Radius | 7.5 – 13 meters |
| Lifting Height (Above Rail) | 10 – 45 meters | Lifting Height (Below Rail) | 5 – 30 meters |
| Working Duty Class | A6 – A8 | Grab Volume | 5 – 40 m³ |
| Max. Wheel Load | 180 – 400 kN | Operating Temperature | -25°C to +45°C |
RELATED PRODUCTS
APPLICATION
1. High-Precision Bulk Cargo Terminals
The four-link level luffing mechanism excels at unloading bulk carriers where precise grab positioning over narrow hatch openings is critical. The near-zero horizontal load deviation during luffing ensures clean, spill-free discharge into receiving hoppers, making it ideal for premium bulk commodities such as grain, fertilizers, and chemical products where material loss must be minimized.
2. Multi-Purpose Port & Wharf Operations
With quick-change attachment systems, the crane transitions seamlessly between clamshell grab (bulk), hook (general cargo), and optional container spreader operations. This versatility makes it the preferred choice for multi-purpose terminals that handle both bulk commodities and break-bulk cargo on the same vessel call.
3. Power Plant Coal Receiving Docks
Coal-fired power plants rely on these cranes for consistent, high-availability coal intake. The four-link system's smooth luffing action minimizes material spillage and dust generation, while its ability to operate in continuous duty cycles ensures uninterrupted fuel supply to the plant's conveyors.
4. Steel Mill Raw Material Yards
The crane handles iron ore, limestone, coke, and other metallurgical inputs with heavy-duty grab configurations. The precision level luffing enables accurate stacking and reclaiming operations, optimizing yard space utilization and reducing material degradation.
5. Transshipment & River/Sea Interface
Ideal for transshipment operations where bulk cargo is transferred between sea-going vessels and river barges or coasters. The crane's gantry travel capability allows it to move along the quay to service multiple berthing positions, while the 360° slewing enables it to reach both sides of the vessel and shore hoppers.
