Buoyancy Bags – wiselinkmaritime.com

Lifting Bags Overview

Lifting Bags (also known as Salvage Bags or Buoyancy Bags) are specialized, heavy-duty inflatable devices designed to generate upward buoyancy underwater. They are the essential tools for marine recovery, underwater construction, and salvage operations.

At WISELINK Maritime,we specialize in providing high-performance underwater lifting and buoyancy solutions tailored for the global maritime industry. With a commitment to engineering excellence and safety, we offer a comprehensive range of buoyancy equipment designed to handle the most demanding subsea challenges.

Products Details

Underwater Pillow Bags

Parachute Type Lift Bags

Tube Buoyancy Bags

Water Filled Weight Bags

Load Test Water Bags

Marine Buoyancy Bags

Underwater Lift Bags

Inflatable Fenders & Buoys

Parachute Type Lift Bags

These bags have an open bottom, allowing water to escape as the bag inflates and rises. They function similarly to a parachute, capturing air to generate lift while allowing excess air and water to exit through the open bottom.

Lifting capacity： 100 kg – 30,000 kg

Construction: Open bottom, parachute design

Valves: Pressure relief valve in upper part (500kg+)

Lifting straps: High-strength polyester, safety factor ≥4

Best for: Deep-water lifting, salvage operations

Applications: Diver-operated lifting, deep-water salvage, pipeline installation

Underwater Pillow Bags

Compact, enclosed pillow-shaped bags that are highly versatile and widely used in marine salvage more than any other style.

Lifting capacity: 500 kg – 5,000 kg

Construction: Enclosed pillow shape

Material: High-strength PVC coating, UV resistant

Features: Compact size, easy deployment

Best for: Vehicle recovery, ROV operations, emergency flotation

Applications: Automobile recovery, underwater construction, emergency flotation systems

Marine Buoyancy Bags

Heavy-duty cylindrical lifting bags designed specifically for shipwreck recovery and re-floating operations.

Capacity: 5 tons – 100+ tons

Construction: Totally enclosed cylindrical shape

Compliance: IMCA D-016 certified

Features: Multiple lifting points, reinforced seams

Best for: Shipwreck salvage, vessel re-floating

Applications: Sunken vessel recovery, buoyancy support, offshore salvage

Water Filled Weight Bags

It is a heavy-duty, flexible container designed to be filled with water to create a precise, adjustable weight for load testing, ballasting, or ballasting applications.

Base Fabric: High-strength, low-shrink polyester fiber (DIN EN 60001)

Coating Material: PVC (Polyvinyl Chloride) – SGS certified

Fabric Model Options: ZQ70, ZQ90, ZQ120, SCYY90

Fabric Thickness: 0.7 mm – 1.2 mm (depending on model)

Fabric Width: 2100 mm (standard)

Available Colors: Red mud, Blue, Army green, White