Hongruntong Marine LLC.
| Payment Terms | L/C, T/T, D/A, D/P, Western Union, MoneyGram |
| Supply Ability | 2990 Pcs Per Month |
| Delivery Time | 5-7 Work Days |
| Packaging Details | Wooden Pallets, Wooden Box |
| Product Name | Underwater Lift Bags |
| Material | Top Notch PVC Coating Fabric |
| Reinforcement | Nylon Fabric |
| Lifting Capacity | 200Kg to 50 Tons |
| Type | Parachute |
| Layers | 1-6Ply, or As Request |
| Thickness | 0.4mm-2.5mm, or As Request |
| Color | Black, Yellow, Orange, or As Request |
| Valve | Inflation and Pressure Release |
| Feature | Superior Buoyancy |
| Application | Salvage Operations, Underwater Construction |
| Brand Name | Hongruntong Marine |
| Model Number | HM-ULB92 |
| Certification | ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C, T/T, D/A, D/P, Western Union, MoneyGram | Supply Ability | 2990 Pcs Per Month |
| Delivery Time | 5-7 Work Days | Packaging Details | Wooden Pallets, Wooden Box |
| Product Name | Underwater Lift Bags | Material | Top Notch PVC Coating Fabric |
| Reinforcement | Nylon Fabric | Lifting Capacity | 200Kg to 50 Tons |
| Type | Parachute | Layers | 1-6Ply, or As Request |
| Thickness | 0.4mm-2.5mm, or As Request | Color | Black, Yellow, Orange, or As Request |
| Valve | Inflation and Pressure Release | Feature | Superior Buoyancy |
| Application | Salvage Operations, Underwater Construction | Brand Name | Hongruntong Marine |
| Model Number | HM-ULB92 | Certification | ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS |
| Place of Origin | China | ||
| High Light | underwater lift bags for salvage ，shipwreck salvage flotation bags ，buoyancy lift bags for ships | ||
| Product Name | Underwater Lift Bags |
| Material | Top Notch PVC Coating Fabric |
| Reinforcement | Nylon Fabric |
| Lifting Capacity | 200kg to 50 tons |
| Type | Parachute |
| Layers | 1-6Ply, or As Request |
| Thickness | 0.4mm-2.5mm, or As Request |
| Color | Black, Yellow, Orange, or As Request |
| Valve | Inflation and Pressure Release |
| Feature | Superior Buoyancy |
| Application | Salvage Operations, Underwater Construction |
Underwater Lift Bags are specialized inflatable devices designed to provide controlled buoyancy for lifting heavy objects from beneath the surface of the water. They are constructed from reinforced, high-visibility materials that can withstand harsh marine environments, including saltwater corrosion, oil exposure, and physical abrasion.
The principle behind them is simple yet powerful: by filling the bag with air, the internal pressure displaces water and creates an upward force capable of raising massive loads. Unlike cranes or winches, lift bags operate entirely underwater, allowing divers to position them precisely and control ascent speed for safety.
They come in a range of capacities, from small units for moving tools and debris to large, multi-ton systems for raising boats, anchors, and submerged vehicles. The biggest advantages of lift bags are portability, cost-effectiveness, and the ability to perform salvage or recovery operations without large surface support vessels.
Many models are equipped with overpressure valves, adjustable inflation systems, and quick-release attachment points to ensure operational safety in complex underwater conditions. Whether used by commercial divers, rescue teams, or hobbyists, Underwater Lift Bags offer a versatile and environmentally friendly lifting solution.
| Product Name | Underwater Lift 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 |
| OEM | Welcome |
| Warranty | 3 Years |
| Tolerances | +/- 0.03 on densities +/- 0.2 mm on thickness +/- 0 to +3mm on width +/- 0 to +3mm on length |
| Model | Lifting Capacity | Dimensions (mm) | Approx. Weight (kg) | |
|---|---|---|---|---|
| HM-ULB01 | 200 kg | 441 lbs | 800 | 5 |
| HM-ULB02 | 500 kg | 1,103 lbs | 1,000 | 8 |
| HM-ULB03 | 1,000 kg | 2,205 lbs | 1,300 | 11 |
| HM-ULB04 | 2,000 kg | 4,410 lbs | 1,600 | 20 |
| HM-ULB05 | 4,000 kg | 8,820 lbs | 2,000 | 50 |
| HM-ULB06 | 6,000 kg | 13,230 lbs | 2,300 | 66 |
| HM-ULB07 | 8,000 kg | 17,640 lbs | 2,500 | 75 |
| HM-ULB08 | 10,000 kg | 22,050 lbs | 2,700 | 80 |
| HM-ULB09 | 15,000 kg | 33,075 lbs | 3,100 | 110 |
| HM-ULB10 | 20,000 kg | 44,100 lbs | 3,400 | 130 |
| HM-ULB11 | 30,000 kg | 66,150 lbs | 3,900 | 170 |
| HM-ULB12 | 50,000 kg | 110,250 lbs | 4,600 | 220 |
| HM-ULB13 | 70,000 kg | 154,350 lbs | 5,200 | 310 |
| HM-ULB14 | 100,000 kg | 220,500 lbs | 5,800 | 450 |
| HM-ULB15 | 150,000 kg | 330,750 lbs | 6,600 | 660 |
| HM-ULB16 | 200,000 kg | 441,000 lbs | 7,300 | 900 |
Note: Other sizes can be customized according to the requirements.
Company Details
Business Type:
Manufacturer
Year Established:
1990
Total Annual:
5,256,780-5,593210
Employee Number:
220~360
Ecer Certification：
Verified Supplier
Hongruntong Marine is a leading marine company specializing in providing comprehensive services in the maritime industry. With a strong emphasis on quality, safety, and efficiency, we strive to meet the evolving needs of our clients. Established in 1990, Hongruntong Ma... Hongruntong Marine is a leading marine company specializing in providing comprehensive services in the maritime industry. With a strong emphasis on quality, safety, and efficiency, we strive to meet the evolving needs of our clients. Established in 1990, Hongruntong Ma...
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