Hongruntong Marine LLC.
| Payment Terms | L/C, T/T, D/A, D/P, Western Union, MoneyGram |
| Supply Ability | 1880 Pcs Per Month |
| Delivery Time | 5-7 Work Days |
| Packaging Details | Wooden Pallets, Wooden Box |
| Product Name | Marine Floating Barrier |
| Material | TOP Grade PVC Coating Fabric |
| Reinforcement | Nylon Fabric |
| Lifting Capacity | 200Kg to 50 Tons |
| Type | Pillow |
| Feature | Durable and Reliable Construction |
| Layers | 1-6Ply, or As Request |
| Thickness | 0.4mm-2.5mm, or As Request |
| Valve | Inflation and Pressure Release |
| Color | Black, Yellow, Orange, or As Request |
| Packaging | Pallets, Wooden Box |
| Application | Salvage Operations, Underwater Construction |
| Brand Name | Hongruntong Marine |
| Model Number | HM-ULB79 |
| 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 | 1880 Pcs Per Month |
| Delivery Time | 5-7 Work Days | Packaging Details | Wooden Pallets, Wooden Box |
| Product Name | Marine Floating Barrier | Material | TOP Grade PVC Coating Fabric |
| Reinforcement | Nylon Fabric | Lifting Capacity | 200Kg to 50 Tons |
| Type | Pillow | Feature | Durable and Reliable Construction |
| Layers | 1-6Ply, or As Request | Thickness | 0.4mm-2.5mm, or As Request |
| Valve | Inflation and Pressure Release | Color | Black, Yellow, Orange, or As Request |
| Packaging | Pallets, Wooden Box | Application | Salvage Operations, Underwater Construction |
| Brand Name | Hongruntong Marine | Model Number | HM-ULB79 |
| Certification | ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS | Place of Origin | China |
| High Light | compact underwater lift bag ，portable pillow air lift ，fast inflation lift bag | ||
Pillow Air Lift Bag Compact Portable Design Fast Inflation Deflation Easy Storage
Description
In emergency underwater situations, such as rescuing trapped vehicles or submersibles, speed and precision are critical. Underwater Lift Bags are well-suited for these missions because they can be deployed rapidly, inflated with standard diving equipment, and controlled with high accuracy. They work without electricity or hydraulics, making them reliable even in challenging conditions. The lightweight, foldable design allows them to be transported easily by rescue teams, while their high lift capacity ensures they can handle even the heaviest loads. Safety features such as overpressure valves, rugged lifting straps, and secure attachment points minimize the risk during urgent operations.
( Case: During a deep-sea research mission, a small unmanned submersible became stuck at a depth of 30 meters after one of its thrusters jammed against a rocky outcrop. Recovery using the ship’s winch system was impossible due to rough sea conditions. A dive rescue team equipped with high-capacity Underwater Lift Bags was dispatched. Divers descended to the site, secured lifting slings around the submersible’s frame, and attached four large-capacity bags. The inflation process was carefully monitored to avoid sudden movement, and the submersible was gently freed from the rock. Once neutrally buoyant, it was towed a short distance to a sheltered area before being brought to the surface. The entire operation took less than two hours, saving valuable scientific equipment and preventing potential environmental hazards from fuel leakage. The mission reinforced the role of lift bags as a rapid-response tool in marine emergencies. )
Specifications
| Product Name | Underwater Lift Bags |
| Raw Material | TOP Grade PVC Coating Fabric |
| Type | Pillow |
| 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 | Capacity | Length | Width | |
|---|---|---|---|---|
| Pillow | [kg] | [lbs] | [mm] | [mm] |
| HM-ULB100 | 100 | 220 | 1,020 | 760 |
| HM-ULB250 | 250 | 550 | 1,320 | 820 |
| HM-ULB500 | 500 | 1,100 | 1,300 | 1,200 |
| HM-ULB1000 | 1,000 | 2,200 | 1,550 | 1,420 |
| HM-ULB2000 | 2,000 | 4,400 | 1,950 | 1,780 |
| HM-ULB3000 | 3,000 | 6,600 | 2,900 | 1,950 |
| HM-ULB5000 | 5,000 | 11,000 | 3,230 | 2,030 |
| *Note: Other sizes can be customized according to the requirements. | ||||
Features
Military Grade Composite Materials
Constructed with high-tensile strength PVC-coated polyester (2000D fabric) with a minimum burst pressure rating of 300 psi, ensuring maximum durability in harsh underwater environments.
Patented Multi Chamber Design
Independent buoyancy compartments with separate inflation valves allow for precise buoyancy control and redundant safety during critical lifting operations.
Depth Rated Performance
Engineered for operations at extreme depths up to 1000 feet (300 meters) with pressure-compensated valves that automatically adjust for depth variations.
Professional Load Capacity
Available in calibrated sizes from 50kg to 20-ton lift capacity, with clearly marked safe working load (SWL) indicators on each unit.
Applications
Naval Military Operations
Recovers submerged vehicles, weapons, and equipment. Used in mine countermeasures and special forces missions for stealthy deployment and retrieval of gear.
Offshore Oil Gas
Assists in subsea equipment installation, including manifolds, risers, and Christmas trees. Maintains buoyancy during deepwater operations and equipment maintenance.
Bridge Dam Repairs
Supports structural repairs by lifting and positioning heavy concrete forms, caissons, and reinforcement materials. Helps remove debris from underwater foundations.
Advantages
Three Decades of Specialized Manufacturing
With over 30 years focused exclusively on underwater lift bag production, we possess unmatched institutional knowledge in buoyancy solutions.
Military Grade Material Selection
We use only high-density PVC-coated polyester fabrics (minimum 2000D) with tested tensile strength exceeding 2000 psi for maximum durability.
Patented Triple Stitch Seam Technology
Our proprietary stitching technique creates seams 40% stronger than industry standard, preventing blowouts under extreme pressures.
Depth Specific Engineering
Each bag series is precision-engineered for specific depth ranges (0-50m, 50-150m, 150-300m+) with corresponding pressure compensations.
FAQ
1. What safety features are included?
All bags feature automatic pressure relief valves, triple-stitched seams, and fail-safe attachment points rated at 5:1 safety factor.
2. How long does a typical lift bag last?
With proper maintenance, our bags have a 10+ year service life, backed by a 7-year warranty against material defects.
3. Do you offer ROV compatible models?
Yes, we provide standardized ROV interfaces with optional real-time pressure/depth telemetry for remote operations.
4. What certifications do your products hold?
All bags meet DNV 2.7-1, IMCA D022, ABS, and Lloyd's Register standards for offshore lifting equipment.
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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