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Marine Lift Bag Powerful Buoyancy Quick Inflation Durable Design

Categories Boat Lift Helper
Brand Name: Hongruntong Marine
Model Number: HM-BLH16
Certification: ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS
Place of Origin: China
MOQ: 1
Price: US$18-US$733
Payment Terms: L/C, T/T, D/A, D/P, Western Union, MoneyGram
Supply Ability: 2520 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
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Marine Lift Bag Powerful Buoyancy Quick Inflation Durable Design

Marine Lift Bag Powerful Buoyancy Quick Inflation Durable Design


Description


The Boat Lift Helper is a versatile lifting solution designed to make underwater lifting operations safer and more efficient. Engineered for maximum buoyancy control and stability, it enables operators to lift boats, submerged structures, or marine equipment with minimal effort and risk. Its robust construction ensures reliability even in challenging underwater conditions.


Case Study


In 2023, a diving team in Rotterdam successfully used 10 Boat Lift Helper units to lift and stabilize a 20-ton sunken ferry section. By gradually inflating each bag and securing the load with reinforced straps, they achieved a controlled ascent with zero sway, allowing the vessel to be safely towed for repairs. This operation demonstrated the product’s efficiency and precision in heavy-lift scenarios.


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


Superior Buoyancy Control
Provides consistent lifting force and smooth, controlled ascents. Adjustable valves allow precise inflation to match the load requirements.


Durable and Resistant Construction
Made from heavy-duty, abrasion-resistant fabric, the lift bag resists wear, UV exposure, and saltwater corrosion. Reinforced seams ensure long-lasting performance.


Quick Deployment and Ease of Use
Compact design allows easy transport and setup. Multiple attachment points enable secure rigging and safe lifting of various loads.


Enhanced Diver Safety
High-visibility panels and anti-tear patches improve monitoring and operational safety during underwater lifting tasks.

Applications


Applications


Boat Salvage

Lift sunken boats, yachts, and commercial vessels efficiently.


Marine Construction

Assist in positioning or removing underwater structures, anchors, and pipelines.


Emergency Operations

Stabilize overturned boats or provide temporary flotation support for rescue missions.

The modular nature of the lift bags allows them to be used individually or in groups, accommodating both small and large-scale lifting projects.


Why Choose Hongruntong Marine?


Innovative Engineering

Advanced design ensures optimal buoyancy distribution, stable ascent, and predictable performance.


Quality Manufacturing

ISO 9001-certified production with rigorous seam, fabric, and valve testing guarantees long-term reliability.


Proven Global Performance

Used by marine contractors worldwide for high-stakes salvage and underwater lifting projects.


Comprehensive Support

Includes operation manuals, maintenance training, spare parts supply, and on-site technical guidance.


FAQ


1. What is the lifting capacity?
Up to 60 tons per bag, multiple bags can be combined for larger lifts.


2. How to maintain the bag?
Rinse with fresh water, inspect seams and valves, store deflated in a shaded area.


3. Operating conditions?
Works from -20°C to 60°C, resistant to UV, saltwater, and chemicals.


4. Can it be used with cranes or winches?
Yes, reinforced D-rings and straps fit standard rigging and lifting equipment.


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