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Boat Lift Helper Easy Transport Extreme Strength Long Lasting Performance

Categories Boat Lift Helper
Brand Name: Hongruntong Marine
Model Number: HM-BLH15
Certification: ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS
Place of Origin: China
MOQ: 1
Price: US$17-US$633
Payment Terms: L/C, T/T, D/A, D/P, Western Union, MoneyGram
Supply Ability: 3520 Pcs Per Month
Delivery Time: 5-7 Work Days
Packaging Details: Wooden Pallets, Wooden Box
Product Name: Boat Lift Helper
Reinforcement: Nylon Fabric
Material: PVC Coating Fabric
Feature: Durable Construction, Easy Filling and Emptying
Thickness: 0.4mm-2.5mm, Or as Request
Lifting Capacity: 200kg to 50 Tons
Warranty: 36 Months
Valve: Inflation and Pressure Release
Color: Black, Yellow, Orange, Or as Request
Application: Structural Load Testing, Proof Load Testing
MOQ: 1
OEM: Welcome
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Boat Lift Helper Easy Transport Extreme Strength Long Lasting Performance

Boat Lift Helper Easy Transport Extreme Strength Long Lasting Performance


Description


The Boat Lift Helper, also known as Cylindrical Underwater Lift Bags, is a high-performance buoyancy system designed for underwater lifting, stabilization, and salvage operations. Built with reinforced, tear-resistant materials, it delivers safe, stable, and efficient lifting power for boats, submerged equipment, and marine structures. Its cylindrical shape reduces drag and lateral forces underwater, enabling precise control during lifts.


Compared with pillow-style lift bags, the Boat Lift Helper provides more predictable ascent behavior and faster deployment. Divers can easily transport and set up the bags, even in challenging underwater conditions. This product has become a trusted choice for professional salvage divers, offshore contractors, and emergency responders worldwide.


Case Study

In 2024, a Japanese port authority used 8 Boat Lift Helper units to lift and relocate a 25-ton concrete pontoon damaged in a typhoon. The bags were attached by a two-diver team and inflated gradually to achieve neutral buoyancy before moving the pontoon to a repair area. The operation was completed in just 3 hours—50% faster than using traditional steel pontoons or crane barges.


Specifications


Product NameBoat Lift Helper
Raw MaterialPVC Coating Fabric
TypeCylindrical
Size500kg, 1000kg, 5000kg 10000kg,etc
Thickness0.4-1.2mm, Or as request
ColorYellow, Blue, Black, etc
Density0.33-0.9g/cm3
Safety Factor7:1

Tolerances

+/- 0.03 on Densities

+/- 0.2 mm on Thickness

+/- 0 to +3mm on Width

+/- 0 to +3mm on Length


ModelBuoyancyDiameterLengthAppr. Weight
Cylindrical[kg][lbs][mm][mm][kg]
HM-BLH012004415001,0005
HM-BLH025001,1038001,0008
HM-BLH031,0002,2051,0001,50011
HM-BLH042,0004,4101,3001,50020
HM-BLH054,0008,8201,6002,00050
HM-BLH066,00013,2302,0002,00066
HM-BLH078,00017,6402,0002,60075
HM-BLH0810,00022,0502,4002,40080
HM-BLH0915,00033,0752,6003,000110
HM-BLH1020,00044,1003,0003,000130
HM-BLH1130,00066,1503,0004,500170
HM-BLH1250,000110,2504,0004,000220
HM-BLH1370,000154,3504,0005,700310
HM-BLH14100,000220,5004,0008,000450
HM-BLH15150,000330,7505,0008,000660
HM-BLH16200,000441,0005,00010,000900
*Note: Other sizes can be customized according to the requirements.

Features


Exceptional Buoyancy Control

Boat Lift Helper bags deliver up to 60 tons of lifting force per unit. Overpressure relief valves and dual inflation ports give divers precise control of ascent speed and stability, minimizing the risk of uncontrolled rises.


Reinforced Safety Design

Manufactured with double-layer, heavy-duty coated fabric and RF-welded seams, these bags are built for high stress and harsh underwater environments. Integrated anti-tear safety patches provide extra protection when handling jagged or abrasive loads.


Rapid Deployment Versatility

Each bag can be rolled into a compact size for transport. Standard air fittings allow inflation from scuba cylinders or compressors. Multiple attachment points let operators secure loads in different configurations, from vertical lifts to horizontal stabilization.


Enhanced Visibility Monitoring

High-visibility panels and color-coded straps make it easy to identify bag position underwater. Optional lift indicators allow operators on the surface to monitor inflation and load position in real time for added safety.


Applications


Heavy Vessel Recovery

Ideal for lifting sunken fishing boats, barges, or small ferries. Cylindrical lift bags provide a balanced and safe lift, reducing the risk of damage during recovery.


Pipeline Subsea Equipment Installation

Perfect for positioning or removing underwater pipelines, valves, and other marine infrastructure. Their shape minimizes current drag, allowing accurate placement.


Emergency Salvage Rescue

Useful for stabilizing overturned vessels, raising crashed aircraft sections, or supporting emergency flotation equipment during disaster response.


Why Choose Hongruntong Marine?


Innovative Engineering Expertise

Our design team continuously improves the buoyancy and safety of Boat Lift Helper models. Using 3D modeling and fluid-dynamics simulations, we create lift bags with superior performance in real-world marine conditions.


Rigorous Quality Assurance

All Boat Lift Helpers are produced in ISO 9001-certified facilities. Each bag undergoes full buoyancy and leak testing before shipment. Quality checkpoints cover fabric integrity, seam weld strength, valve performance, and attachment durability.


Global Marine Project Experience

Hongruntong Marine equipment has supported projects in over 30 countries. In 2023, a European salvage company used our lift bags to recover a 180-ton floating dock section after a storm—successfully and ahead of schedule.


Comprehensive Customer Support

We provide detailed operation manuals, training videos, and 24/7 technical assistance. Spare parts such as valves and straps are always in stock. For large-scale or specialized lifts, our engineers can offer on-site guidance to ensure smooth and safe operations.


FAQ

1. What sizes of Boat Lift Helper are available?
Models range from 1-ton to 60-ton buoyancy per bag. Operators can combine multiple units to achieve larger lifting capacities, for example, five 20-ton bags to lift a 100-ton structure.


2. How do I safely inflate and deflate the bags?
Use standard scuba cylinders or low-pressure compressors. Inflate gradually while monitoring the load. Use the overpressure relief valves to control ascent speed. Always vent air slowly at the surface before disconnecting.


3. What maintenance is required?
After each operation, rinse bags with fresh water, check seams and valves for wear, and store deflated in a cool, dry place. Routine inspection every 6 months will extend service life to 10 years or more.


4. Are the bags compatible with existing rigging systems?
Yes. Reinforced stainless-steel D-rings and webbing straps accommodate shackles, chains, and slings. In a recent salvage operation in Canada, our bags were used with a crane barge and custom rigging frame to lift a 35-ton dock section.


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