Parachute Underwater Lift Bag Reinforced Fabric Fast Inflation Superior Buoyancy
Product Overview
Hongruntong Marine Parachute Underwater Lift Bag is a professional underwater lifting and buoyancy control solution designed for marine salvage, offshore engineering, underwater construction, and commercial diving applications. Developed for operations requiring accurate load control and dependable lifting performance, this product provides an efficient method for recovering submerged objects, supporting underwater installation tasks, and improving safety during complex marine operations.
The lift bag adopts a parachute-type open-bottom design that delivers excellent buoyancy efficiency while maintaining controlled ascent performance. As the lift bag rises through different water depths, excess air can escape naturally through the open-bottom structure, reducing the possibility of over-expansion and allowing operators to maintain stable lifting control. This feature makes the product particularly suitable for deep-water recovery, offshore maintenance, and underwater projects where precision and safety are essential.
Manufactured from high-strength PVC-coated polyester fabric, Hongruntong Marine Parachute Underwater Lift Bag provides excellent resistance to abrasion, tearing, seawater corrosion, UV radiation, and harsh marine conditions. The advanced material structure ensures reliable performance during repeated underwater operations while maintaining flexibility for transportation, deployment, and storage.
Case Study: Submerged Vessel Recovery Operation
A marine salvage company operating along the Mediterranean coastline faced a challenging recovery project after a severe storm caused a small commercial vessel to sink near a busy fishing harbor. The 1,200 DWT cargo vessel settled on the seabed at a depth of approximately 18 meters, blocking part of the navigation area and affecting normal harbor operations.
After evaluating the recovery requirements, the contractor selected Hongruntong Marine Parachute Underwater Lift Bags as the primary lifting solution. Divers installed multiple lift bags around key structural points to create balanced buoyancy during recovery.
The lift bags were gradually inflated according to the calculated lifting plan. The parachute-type design provided stable upward force while maintaining good control of the vessel's movement. As the vessel began rising from the seabed, the open-bottom structure automatically released excess air, preventing sudden buoyancy changes and allowing the salvage team to maintain accurate control.
The vessel was successfully lifted to a safe position where additional recovery equipment could complete the operation. The entire process was completed without requiring a large crane vessel, significantly reducing project costs and shortening the harbor closure period.
Technical Specifications
| 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 |
Tolerances: +/- 0.03 on densities, +/- 0.2 mm on thickness, +/- 0 to +3mm on width, +/- 0 to +3mm on length
Model Specifications
| 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.
Key Features
Superior Buoyancy Control for Safe and Accurate Lifting
Engineered to provide precise buoyancy control throughout the entire lifting process. The parachute-style design creates efficient upward force while maintaining excellent stability, allowing operators to manage underwater loads with greater accuracy.
Heavy-Duty Marine Materials for Reliable Long-Term Performance
High-performance PVC-coated polyester fabric designed specifically for marine and offshore environments. Provides excellent tensile strength while remaining flexible enough for easy handling and deployment.
Durable Safety Structure for Professional Underwater Operations
Incorporates multiple safety-focused structural features including heavy-duty lifting straps, reinforced connection points, and optional safety components like overpressure relief valves and protective covers.
Customized Solutions for Marine and Industrial Applications
Customized options available for different buoyancy capacities, dimensions, colors, valve systems, lifting arrangements, and protective configurations to meet specific project requirements.
Applications
- Coastal Salvage and Emergency Recovery: Recovering damaged vessels, sunken equipment, anchors, containers, and other underwater objects
- Offshore Engineering and Subsea Maintenance: Equipment positioning, pipeline maintenance, subsea structure adjustment, and underwater installation projects
- Diving Operations and Underwater Construction: Underwater inspections, vessel maintenance, component handling, and construction support tasks
Why Choose Hongruntong Marine
- Comprehensive Experience: Extensive experience in designing and manufacturing marine equipment for underwater operations
- Advanced Manufacturing Technology: Advanced production techniques and strict quality control systems throughout manufacturing
- Professional Customization: Flexible customization services and engineering support to satisfy different customer requirements
- Reliable International Service: Professional communication, technical consultation, and long-term partnership support
Frequently Asked Questions
What is the recommended operating environment for Parachute Underwater Lift Bags?
The lift bags are suitable for marine environments including ports, offshore platforms, shipyards, salvage sites, and underwater construction areas. They can operate effectively in both coastal and offshore conditions.
Can the lift bag handle irregular underwater objects?
Yes. The flexible buoyancy characteristics allow the lift bag to assist with lifting irregular objects such as vessels, machinery, pipelines, and structural components.
Are different colors and markings available?
Yes. Hongruntong Marine can provide customized colors, logos, labels, and identification markings according to customer requirements.
How should the lift bag be inspected before use?
Before operation, users should check the fabric condition, lifting straps, connection points, valves, and seams. Regular inspection helps ensure safe and reliable performance.
Does Hongruntong Marine provide solutions for large-scale lifting projects?
Yes. Multiple lift bags can be combined for large underwater recovery operations. Our technical team can assist with buoyancy calculations and suitable configuration recommendations.
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