Professional Enclosed Underwater Lift Bags

Professional Enclosed Underwater Lift Bags are versatile, heavy-duty lifting solutions designed for construction, salvage, offshore and subsea operations. Featuring an enclosed-bottom, parachute-style design with a single attachment point, these lift bags provide maximum lift efficiency, controlled buoyancy and safe load handling across a wide range of applications.

Manufactured using urethane-coated, high-strength nylon, the bags offer excellent abrasion resistance, resistance to petro-chemicals, and long-term durability in harsh marine environments. RF-welded seams ensure consistent strength and low maintenance, while the design prevents air loss even if the bag breaks the water surface.

All lift bags are fully tested prior to shipment and manufactured in accordance with IMCA D-016-AIRBAGS, ABS, and U.S. Department of Defense standards.

Construction & Materials

• Urethane-coated nylon fabric

• High-strength, heavy-duty construction

• Superior abrasion resistance

• Resistant to most petro-chemicals

• UV-resistant

• RF-welded seams for long-term integrity

• Easy to clean and low maintenance

Design & Operation

Below 2 Tons

• Multiple nylon lift straps sewn directly into the base

• Load borne through the bag structure

• Safe working ratio: 6:1

• 3/4″ NPT inflation port with quick disconnect or cam-lock fitting

• 3/4″ stainless steel ball valve for rapid deflation

2 Tons and Above

• Replaceable heavy-duty nylon webbing lift harness integrated into the bag skin

• Load transferred through the harness system

• Safe working ratio: 6:1

• 3/4″ NPT inflation port with quick disconnect or cam-lock fitting

• 3/4″ stainless steel ball valve for rapid deflation

Performance & Safety Features

• “Inverted water droplet” shape maximises lift with minimal bag weight

• Even stress distribution across the fabric surface

• Can be pre-inflated when required

• Will not dump air if the bag breaks the surface

• Pressure relief valves prevent over-pressurisation

• Supplied complete with all required hardware

• Ready for immediate deployment

Compliance & Quality Assurance

• Individually tested prior to shipping

• Custom sizes available on request

• Compliant with IMCA D-016-AIRBAGS, ABS, and U.S. Department of Defense Standards

• Manufactured by Subsalve USA

Available Models & Capacities

Metric Capacities

• 500 kg to 50,000 kg lift capacities

• Diameters from 0.90 m to 4.22 m

• Overall heights up to 8.03 m

A full range of models is available to suit light recovery, heavy salvage, offshore construction and subsea lifting operations.

Typical Applications

• Offshore and subsea construction

• Light and heavy salvage operations

• Marine civil engineering

• Underwater recovery and relocation

• Controlled lifting of submerged structures

Product Specifications