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Marine Lift Bag Puncture Resistant Surface Temperature Resistant Material Quick Deployment System

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US$10-US$870
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Marine Lift Bag Puncture Resistant Surface Temperature Resistant Material Quick Deployment System
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Features
Specifications
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
Highlight:

puncture resistant marine lift bag

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temperature resistant underwater lift bag

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quick deployment marine lift system

Basic Infomation
Place of Origin: China
Brand Name: Hongruntong Marine
Certification: ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS
Model Number: HM-ULB74
Payment & Shipping Terms
Packaging Details: Wooden Pallets, Wooden Box
Delivery Time: 5-7 Work Days
Payment Terms: L/C, T/T, D/A, D/P, Western Union, MoneyGram
Supply Ability: 9800 Pcs Per Month
Product Description
Marine Lift Bag Puncture Resistant Surface Temperature Resistant Material Quick Deployment System
Product Attributes
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
Product Description

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.

Specifications
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 Specifications
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.
Features
  • Fail Safe Pressure Release
    Automatic venting systems activate at predetermined pressures (typically 15-20% above working limits) to prevent over-expansion.
  • Professional Attachment System
    Heavy-duty stainless steel D-rings rated at 5:1 safety factor with integrated load distribution webbing.
  • High Visibility Markings
    Fluorescent orange/yellow coloration with retroreflective striping for enhanced visibility in low-light conditions.
  • Precision Buoyancy Control
    Micro-adjustment valves allow for 0.5kg incremental lift adjustments during delicate operations.
Applications
  • Aquaculture Operations
    Positions and maintains fish farm net pens, feeding systems, and harvesting equipment. Provides buoyancy for heavy installations in marine farms.
  • Underwater Photography Videography
    Stabilizes cameras, lighting rigs, and filming equipment for clear shots. Adjusts buoyancy for precise positioning during shoots.
  • Marine Environmental Cleanup
    Removes sunken debris, discarded fishing gear, and pollutants. Assists in oil spill responses and artificial reef placements.
Advantages
  • ROV Integrated Design Capability
    Bags can be customized with standardized ROV interfaces for remote deepwater operations.
  • Corrosion Proof Hardware
    All metal components use marine-grade 316L stainless steel with electropolished surfaces.
  • Modular Buoyancy Systems
    Patented interconnect technology allows multiple bags to function as synchronized lifting arrays.
  • Abrasion-Resistant Armor Options
    Kevlar-reinforced base panels available for operations involving sharp or rough surfaces.
Frequently Asked Questions
1. What's your lead time for standard orders?
Most standard configurations ship within 5-7 working days; expedited 48-hour service is available.
2. Do you provide on-site training?
Yes, we offer comprehensive operator training programs at your facility or ours.
3. How are bags packaged for shipping?
Units are vacuum-sealed with anti-corrosion treatment, shipped in heavy-duty transit cases with full documentation.
4. Can bags be repaired if damaged?
We offer global repair services with original materials - most repairs are completed within 5 working days.
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Get in touch with us
Contact Person : Mr. William Lau
Tel : +8618910539783
Fax : 86-10-89461910
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