Cylindrical Underwater Lift Bags Marine Salvage Airbags Inflatable
Air Lift Bag
Description
Underwater lift bags are specialized flotation devices used for
lifting heavy objects from the seabed to the surface. Designed with
high-strength, UV- and saltwater-resistant materials, our lift bags
provide exceptional durability and safety in various underwater
applications, including marine salvage, deep-sea recovery,
shipwreck retrieval, and offshore engineering. Available in
capacities ranging from 50 kg to 50,000 kg, our lift bags ensure
efficient buoyancy control with built-in relief valves that prevent
overinflation. Featuring multiple inflation/deflation points,
stainless steel D rings, and reinforced webbing, they offer secure
and stable lifting. Our IMCA, ABS, and DNV-compliant lift bags are
trusted by professionals worldwide for their reliability and
superior performance.
Specifications
| Product Name | Underwater Lift Bags |
| Raw Material | PVC coating fabric |
| Type | Cylindrical |
| 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 |
Tolerances | +/- 0.03 on densities +/- 0.2 mm on thickness +/- 0 to +3mm on width +/- 0 to +3mm on length |
| Model | Buoyancy | Diameter | Length | Appr. Weight |
| Cylindrical | [kg] | [lbs] | [mm] | [mm] | [kg] |
| HM-ULB01 | 200 | 441 | 500 | 1,000 | 5 |
| HM-ULB02 | 500 | 1,103 | 800 | 1,000 | 8 |
| HM-ULB03 | 1,000 | 2,205 | 1,000 | 1,500 | 11 |
| HM-ULB04 | 2,000 | 4,410 | 1,300 | 1,500 | 20 |
| HM-ULB05 | 4,000 | 8,820 | 1,600 | 2,000 | 50 |
| HM-ULB06 | 6,000 | 13,230 | 2,000 | 2,000 | 66 |
| HM-ULB07 | 8,000 | 17,640 | 2,000 | 2,600 | 75 |
| HM-ULB08 | 10,000 | 22,050 | 2,400 | 2,400 | 80 |
| HM-ULB09 | 15,000 | 33,075 | 2,600 | 3,000 | 110 |
| HM-ULB10 | 20,000 | 44,100 | 3,000 | 3,000 | 130 |
| HM-ULB11 | 30,000 | 66,150 | 3,000 | 4,500 | 170 |
| HM-ULB12 | 50,000 | 110,250 | 4,000 | 4,000 | 220 |
| HM-ULB13 | 70,000 | 154,350 | 4,000 | 5,700 | 310 |
| HM-ULB14 | 100,000 | 220,500 | 4,000 | 8,000 | 450 |
| HM-ULB15 | 150,000 | 330,750 | 5,000 | 8,000 | 660 |
| HM-ULB16 | 200,000 | 441,000 | 5,000 | 10,000 | 900 |
| *Note: Other sizes can be customized according to the requirements. |
Features
High Strength, Durable Materials
Made from heavy-duty, coated nylon or PVC fabric, our lift bags are
tear-resistant, UV-protected, and saltwater-resistant, ensuring
long-term durability in harsh marine environments.
Advanced Safety Features
Equipped with automatic overpressure relief valves, our lift bags
prevent overinflation and sudden ascent, ensuring safe and
controlled lifting operations.
Reinforced Load Bearing Straps
Designed with industrial-grade webbing and stainless steel D-rings,
our lift bags provide superior load stability and secure attachment
to objects, preventing damage during lifting.
Multiple Inflation and Deflation Options
Featuring easy-to-access inflation/deflation ports, our lift bags
allow for quick setup and efficient buoyancy control, making
operations more flexible and time-saving.
Applications
● Marine salvage operations
● Shipwreck recovery
● Sunken vehicle retrieval
● Offshore platform maintenance
● Subsea pipeline installation
Advantages
Strict Quality Control Certifications
Our products comply with IMCA, ABS, Lloyd’s Register, and DNV
standards, ensuring they meet global safety and performance
requirements.
Customizable Solutions
We offer custom-designed lift bags tailored to specific customer
requirements, including custom buoyancy levels, branding, and
special attachment options.
Global Customer Support Fast Delivery
With efficient production and worldwide shipping, we ensure fast
delivery times and professional customer support to assist with
technical inquiries and operational guidance.
Trusted by Industry Professionals Worldwide
Our underwater lift bags are widely used by commercial divers,
salvage teams, offshore engineers, military recovery teams, and
marine construction companies, proving their reliability and
superior performance in demanding environments.
FAQ
1. What is an underwater air lift bag?
It is a buoyancy device used to lift and recover submerged objects
by inflating with air to provide controlled ascent.
2. What types of underwater air lift bags do you manufacture?
We produce open-bottom parachute lift bags, enclosed lift bags,
pillow-style lift bags, and custom-designed lift bags.
3. What are the main applications of underwater air lift bags?
They are used for marine salvage, shipwreck recovery, underwater
construction, offshore maintenance, military operations, and
environmental cleanup.
4. How do underwater air lift bags work?
They are filled with compressed air, generating buoyancy that
allows objects to be lifted safely to the surface.
