JM Air Hoists Fixed Series(25~50t)
Product Description
JM Air Hoists Fixed Series(25~50t)
Product Introduction:
The JM Air Hoists Fixed Series (25–50t) is a heavy-lift pneumatic hoisting solution at the very top of the capacity range, engineered for the most extreme material handling challenges in heavy industry. With a lifting capacity spanning 25 to 50 tons, this series delivers crane-class lifting performance in a compact, intrinsically safe pneumatic package—designed specifically for environments where electric cranes are impractical, unsafe, or prohibitively expensive to install.
Core Strengths:
1.Ultimate Heavy-Lift Capacity
Capable of handling loads from 25 tons up to 50 tons, the JM series is powered by high-torque multi-vane air motors coupled with heavy-duty multi-stage planetary gear reducers, delivering immense lifting torque while maintaining smooth, shock-free acceleration and deceleration—even at maximum rated capacity.
2.Absolute Intrinsic Safety for the Most Hazardous Zones
With zero electrical components, the hoist completely eliminates ignition sources, making it the definitive choice for:
*Zone 0/1/2 explosive gas atmospheres (ATEX / IECEx certified options available)
*Zone 20/21/22 combustible dust environments
*Underground coal mining operations (methane-rich environments)
*Oil refineries and petrochemical cracking units
*Offshore drilling platforms and FPSO vessels
*Munitions handling and storage facilities
3.Fixed Installation for Maximum Stability
Designed for permanent suspension from heavy-duty structural steelwork, reinforced concrete beams, or purpose-built gantry frames. The fixed-point configuration ensures perfect load alignment, minimizes pendulum swing, and provides the stability required when handling oversized, asymmetrical, or high-value loads (e.g., turbine rotors, reactor vessels, massive dies).
4.Precision Control at Maximum Capacity
Pneumatic proportional control valves enable fully variable stepless speed regulation, allowing operators to perform millimeter-level positioning of multi-ton components—essential for:
*Power plant turbine and alternator installation
*Heavy press and forging die alignment
*Large-scale structural steel erection
*Precision placement of heavy process equipment
Outline Dimensions (JM50t-4):
Outline Dimensions (JM25t-5/JM37.5t-3):
| Model | JM25-2 | JM37.5-3 | JM50-4 | |
| A | mm | 1670 | 1820 | 1780 |
| B | mm | 435 | ||
| C | mm | 252 | ||
| D | mm | 370 | ||
| E | mm | 903 | 1054 | |
| F | mm | 483 | 570 | |
| G | mm | 420 | 484 | |
| Hmin | mm | 1519 | 1630 | 1565 |
| J | mm | 183 | ||
| φ | mm | 80 | 100 | 112 |
| M | mm | 63 | 80 | 90 |
Technical Parameters:
| Model | JM25-2 | JM37.5-3 | JM50-4 | |
| Duty Classification | M3 | |||
| Lifting Capacity | t | 25 | 37.5 | 50 |
| Lifting Height | m | 3 | ||
| Number of Chain Falls | 2 | 3 | 4 | |
| Motor Output Power | kW | 7 | ||
| Working Pressure | bar (kg/cm²) | 6 | ||
| No-load Lifting Speed | m/min | 2.2 | 1.5 | 1.1 |
| Full-load Lifting Speed | m/min | 1.2 | 0.7 | 0.54 |
| Full-load Lowering Speed | m/min | 2.6 | 1.8 | 1.4 |
| Air Consumption | m³/min | 8 | 8.4 | 8.7 |
| Air Inlet Connection | in | G1⊃1;/2 | ||
| Air Hose Size (I.D.) | mm | 38 | ||
| Chain Size | mm | 22×66 | ||
| Control Hose Length | m | 3 | ||
| Noise Level (Full-load Lifting) | dB | 85 | 8 | 8 |
| Noise Level (Full-load Lowering) | dB | 87 | 9 | 0 |
| Weight | kg | 680 | 800 | 850 |
| Notes: 1.The control hose length is configured based on the standard lifting height of 3m. 2.The net weight is calculated based on a lifting height of 3m. 3.JM60-4 (Lifting Capacity: 60t) — Chain Size: 23.5×66 mm, Duty Classification: M2. | ||||
Primary Applications:
*Power generation – Turbine rotor handling, generator stator installation
*Heavy equipment manufacturing – Press bed and slide handling, large machine tool assembly
*Petrochemical and refining – Reactor vessel lifting, heat exchanger installation
*Mining and quarrying – Crusher and conveyor drive assembly, underground equipment transfer
*Steel and heavy metal fabrication – Ladle handling, large die changes, structural steel placement
*Shipbuilding – Propeller shaft installation, rudder and heavy machinery placement in dry dock
*Offshore oil & gas – Subsea equipment handling, deck module installation
*Heavy construction – Precast concrete element placement, bridge segment handling