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Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Specifications
Brand Name :
Hongruntong Marine
Model Number :
HM-UALB64
Certification :
BV, ABS, DNV, LR, SGS, CCS, RMRS
Place of Origin :
China
MOQ :
1
Price :
US$190-US$889
Payment Terms :
L/C,T/T,D/A,D/P,Western Union,MoneyGram
Supply Ability :
1790 Pcs Per Month
Delivery Time :
5-8 Work Days
Packaging Details :
Wooden Pallets, Wooden Box
Name :
Underwater Lifting Bags
Feature :
Durable Construction
Material :
Superior PVC Coating Fabric
Lifting Capacity :
100kg to 60 tons
Type :
Cylindrical, Parachute, Pillow
Layers :
1-6Ply, or As Request
Thickness :
0.4mm-2.5mm, or As Request
Reinforcement :
Nylon Fabric
Valve :
Inflation and Pressure release
Color :
Black, Yellow, Orange, or As Request
Usage :
Underwater air lifting, Salvage, Large buoyancy
Standard :
IMCA-D-016
Certificate :
BV, ABS, DNV, LR, SGS, CCS
OEM :
Warmly Welcomed
Warranty :
36 Months
MOQ :
1
Application :
Salvage operations, Underwater construction
Description
Cylindrical Underwater Air Lift Bag
The cylindrical Underwater Air Lift Bag is an advanced marine buoyancy and lifting solution designed for integrated engineering applications, emergency recovery operations, and complex underwater construction environments. Manufactured from high-performance multi-layer synthetic fabric reinforced with industrial-grade polyurethane and PVC composite coatings, it provides excellent resistance to abrasion, seawater corrosion, UV exposure, and long-term fatigue under cyclic loading.
The cylindrical geometry ensures stable vertical lift performance and balanced load distribution even under irregular underwater conditions. Each unit features reinforced lifting points, high-pressure inflation valves, quick-connect fittings, and multi-stage safety release systems for precise buoyancy control and operational safety.
With lifting capacities ranging from 2 tons to over 400 tons, the system is suitable for both light-duty emergency response and large-scale offshore engineering projects. It is widely used in salvage operations, marine infrastructure installation, harbor engineering, and underwater maintenance tasks.
Case Study: Emergency Vessel Recovery & Harbor Clearance
In a European commercial harbor, a 1,800-ton cargo vessel partially sank after a collision during docking operations, blocking a major shipping channel. The situation required immediate clearance to restore port operations, with strict limitations on environmental impact and operational downtime.
Hongruntong cylindrical underwater air lift bags were rapidly deployed as part of an emergency response system. A modular lifting configuration was used to stabilize the vessel and gradually restore buoyancy. The controlled inflation process allowed engineers to lift the vessel in phases, ensuring structural integrity while preventing secondary damage.
Within 48 hours, the vessel was successfully refloated and moved to a repair zone. The harbor resumed partial operations shortly after, significantly reducing economic losses. The client highlighted the system's rapid deployment capability, operational stability, and effectiveness in emergency marine recovery scenarios.
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Specifications
Product Name Underwater Air Lift Bags
Raw Material Superior PVC Coating Fabric
Type Cylindrical
Size 500kg, 1000kg, 5000kg, 10000kg, etc
Thickness 0.4mm-2.5mm, or as requested
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 Buoyancy (kg) Buoyancy (lbs) Diameter (mm) Length (mm) Weight (kg)
HM-C01 200 441 500 1,000 5
HM-C02 500 1,103 800 1,000 8
HM-C03 1,000 2,205 1,000 1,500 11
HM-C04 2,000 4,410 1,300 1,500 20
HM-C05 4,000 8,820 1,600 2,000 50
HM-C06 6,000 13,230 2,000 2,000 66
HM-C07 8,000 17,640 2,000 2,600 75
HM-C08 10,000 22,050 2,400 2,400 80
HM-C09 15,000 33,075 2,600 3,000 110
HM-C10 20,000 44,100 3,000 3,000 130
HM-C11 30,000 66,150 3,000 4,500 170
HM-C12 50,000 110,250 4,000 4,000 220
HM-C13 70,000 154,350 4,000 5,700 310
HM-C14 100,000 220,500 4,000 8,000 450
HM-C15 150,000 330,750 5,000 8,000 660
HM-C16 200,000 441,000 5,000 10,000 900
Note: Other sizes can be customized according to requirements.
Key Features
  • Integrated Modular Lifting System for Complex Engineering Tasks
    The air lift bag system is designed for modular integration, allowing multiple units to be combined for scalable lifting capacity. This flexibility enables engineers to design customized lifting configurations for complex underwater structures, uneven loads, and large-scale salvage operations.
  • Rapid Deployment for Emergency and Time-Critical Operations
    Engineered for fast response scenarios, the system features quick-connect inflation valves and simplified rigging interfaces. This allows deployment within a short time frame, making it highly effective for emergency vessel recovery and disaster response operations.
  • High Performance Material System with Long-Term Fatigue Resistance
    Constructed using reinforced composite fabric layers that provide excellent resistance to cyclic loading and long-term mechanical fatigue. The material maintains structural integrity even under repeated inflation and deflation cycles.
  • Multi-Level Safety Architecture with Controlled Buoyancy Management
    Safety is enhanced through a multi-layer protection system including overpressure relief valves, controlled exhaust mechanisms, and reinforced connection points. This ensures stable and predictable buoyancy adjustments during lifting operations.
Applications
  • Emergency Vessel Salvage and Harbor Clearance - Rapid deployment system for refloating sunken or damaged vessels and clearing navigation channels
  • Marine Infrastructure Installation and Maintenance - Supports installation of docks, floating structures, and underwater components with controlled lifting capability
  • Integrated Offshore and Coastal Engineering Projects - Used in combined engineering operations requiring flexible lifting, repositioning, and stabilization of submerged structures
Why Choose Hongruntong Marine
  • Strong Focus on Emergency Response and Mission-Critical Engineering
    Specializes in developing solutions for urgent marine recovery and high-risk engineering operations, ensuring reliability when time and safety are critical factors.
  • Advanced System Integration and Engineering Capability
    Provides not just products but complete lifting solutions, including modular system design, engineering consultation, and project-specific configuration support.
  • Premium Grade Materials with Verified Long-Term Performance
    All products are manufactured using certified high-strength materials tested for fatigue resistance, corrosion protection, and long-term underwater performance.
  • Global Service Network with Fast Technical Response
    Offers international support capabilities, ensuring fast communication, technical assistance, and project coordination for clients worldwide.
Frequently Asked Questions
What is the fastest deployment time for emergency use?
With proper preparation, deployment and inflation can be completed within minutes.
Can the system be used in emergency salvage operations?
Yes, it is specifically designed for rapid-response marine recovery tasks.
Are multiple bags required for large vessels?
Yes, modular configurations are recommended for balanced lifting of large structures.
What is the service life of the air lift bags?
With proper maintenance, they can be used for many years under repeated cycles.
How is operational safety ensured?
Through multi-stage pressure control systems and reinforced structural design.
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
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Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life

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Product Detail
Brand Name :
Hongruntong Marine
Model Number :
HM-UALB64
Certification :
BV, ABS, DNV, LR, SGS, CCS, RMRS
Place of Origin :
China
MOQ :
1
Price :
US$190-US$889
Contact Supplier
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life
Underwater Lifting Bag with Balanced Buoyancy Distribution Deep Water Compatible and Long Service Life

Hongruntong Marine LLC.

Verified Supplier
3 Years
beijing, beijing
Since 1990
Business Type :
Manufacturer
Main Products :
Marine Rubber Airbags, Marine Salvage Airbags, Inflatable Marine Airbags
Total Annual :
5,256,780-5,593210
Employee Number :
220~360
Certification Level :
Verified Supplier
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