Attribute | Value |
---|---|
Product Name | Underwater Lift Bags |
Material | Top Notch PVC Coating Fabric |
Reinforcement | Nylon Fabric |
Lifting Capacity | 200kg to 50 tons |
Feature | Superior Buoyancy |
Type | Parachute |
Thickness | 0.4mm-2.5mm, or As Request |
Layers | 1-6Ply, or As Request |
Valve | Inflation and Pressure Release |
Color | Black, Yellow, Orange, or As Request |
Application | Salvage Operations, Underwater Construction |
Underwater Lift Bags are not only used in heavy-duty salvage operations but also play a vital role in delicate underwater projects where precision and care are essential. These devices work on the principle of buoyancy: by inflating the bag with air, water is displaced, creating an upward lift force capable of moving objects weighing from a few kilograms to several tons.
The bags are typically constructed from high-strength, UV-resistant materials with double-stitched seams and reinforced lifting straps. This makes them durable enough to withstand repeated use in challenging marine environments. In restoration and research work, lift bags allow divers to transport heavy structures--such as artificial reef modules or scientific equipment--without disturbing the surrounding habitat.
Many models offer fine-tuned inflation control, enabling gradual, steady ascents that prevent sudden shifts or damage to fragile ecosystems. Since lift bags require no fuel or complex hydraulics, they are environmentally friendly and portable, making them a preferred choice for marine biologists, conservation groups, and eco-focused diving teams.
Case Study: On a tropical coastline, a marine conservation team was tasked with restoring a damaged coral reef. Part of the project involved placing several large concrete reef blocks -- each weighing around 500 kg -- into specific positions to encourage coral regrowth and provide shelter for marine life.
Using traditional lifting equipment would have risked disturbing the seabed and harming nearby corals. Instead, divers deployed medium-capacity Underwater Lift Bags. Each block was fitted with lifting slings connected to the bags, and the divers slowly inflated them until the blocks became neutrally buoyant. This allowed the divers to guide the blocks gently into place by hand, ensuring precise positioning without creating harmful sediment clouds.
Once positioned, the divers released a small amount of air to settle the blocks securely onto the seabed. Over several weeks, the process was repeated for dozens of modules. The team reported zero coral damage and saw fish return to the new structures within days. The project became a model for eco-friendly reef restoration, demonstrating how lift bags can combine technical capability with environmental stewardship.
Specification | Details |
---|---|
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 |