Hongruntong Marine Parachute Underwater Lift Bag is a professional underwater lifting solution developed for subsea recovery, offshore renewable energy projects, marine construction, and commercial diving operations. Designed to provide controlled buoyancy and reliable lifting force, this equipment enables operators to safely move, recover, and position submerged objects in complex underwater environments where traditional lifting methods may be difficult or costly to implement.
The product adopts an open-bottom parachute structure that provides excellent buoyancy efficiency and stable lifting performance. During underwater ascent, the design allows expanding air to escape naturally, reducing the risk of excessive internal pressure while maintaining smooth upward movement. This self-adjusting function improves operational control and makes the lift bag particularly suitable for deep-water applications, offshore maintenance projects, and precision underwater recovery operations.
During the installation phase of an offshore wind farm project in Northern Europe, a construction contractor experienced an unexpected underwater recovery challenge. A hydraulic positioning module weighing approximately 3.8 tons fell from a working platform during subsea foundation preparation and settled near the seabed at a depth of 36 meters.
A professional diving team installed multiple lift bags around the hydraulic module according to the calculated buoyancy requirements. The bags were gradually inflated using controlled air supply, allowing the equipment to separate smoothly from the seabed. The parachute-style design provided excellent stability throughout the lifting process, preventing sudden movement caused by underwater currents.
The entire recovery operation was completed within the planned maintenance window without requiring additional crane vessel support. The contractor reduced project expenses by avoiding extended vessel rental costs and minimized downtime during the offshore construction schedule.
| Product Name | Heavy Duty Inflatable Air Bags |
| Raw Material | Top-Notch PVC Coating Fabric |
| Type | Parachute |
| Size | 500kg, 1000kg, 5000kg, 10000kg, etc |
| Thickness | 0.4-1.2mm, or as request |
| Color | Yellow, Blue, Black, etc |
| Density | 0.33-0.9g/cm³ |
| Safety Factor | 7:1 |
| Accessories | Valve, Inflatable Tube, Repair Material |
| Warranty | 3 Years |
| Model | Lifting Capacity (kg) | Lifting Capacity (lbs) | Dimensions (mm) | Approx. Weight (kg) |
|---|---|---|---|---|
| HM-P01 | 200 | 441 | 800 | 5 |
| HM-P02 | 500 | 1,103 | 1,000 | 8 |
| HM-P03 | 1,000 | 2,205 | 1,300 | 11 |
| HM-P04 | 2,000 | 4,410 | 1,600 | 20 |
| HM-P05 | 4,000 | 8,820 | 2,000 | 50 |
| HM-P06 | 6,000 | 13,230 | 2,300 | 66 |
| HM-P07 | 8,000 | 17,640 | 2,500 | 75 |
| HM-P08 | 10,000 | 22,050 | 2,700 | 80 |
| HM-P09 | 15,000 | 33,075 | 3,100 | 110 |
| HM-P10 | 20,000 | 44,100 | 3,400 | 130 |
| HM-P11 | 30,000 | 66,150 | 3,900 | 170 |
| HM-P12 | 50,000 | 110,250 | 4,600 | 220 |
| HM-P13 | 70,000 | 154,350 | 5,200 | 310 |
| HM-P14 | 100,000 | 220,500 | 5,800 | 450 |
| HM-P15 | 150,000 | 330,750 | 6,600 | 660 |
| HM-P16 | 200,000 | 441,000 | 7,300 | 900 |
Note: Other sizes can be customized according to the requirements.
Parachute Underwater Lift Bags are suitable for marine salvage, offshore construction, commercial diving, underwater recovery, ship repair, and subsea engineering operations.
Yes. Customized sizes, buoyancy capacities, lifting points, valves, accessories, and reinforcement structures can be produced according to customer requirements.
The open-bottom design allows excess air to escape naturally during ascent, reducing pressure buildup and providing smoother lifting control.
Yes. With proper cleaning, inspection, and storage procedures, Hongruntong Marine lift bags can be reused for multiple professional underwater operations.
Customers should provide load weight, operating depth, lifting environment, required buoyancy, and application details so the correct model can be recommended.
