I. Requirements Analysis:

The underwater salvage system is designed to meet the diverse demands of submerged recovery operations. Primarily targeting scenarios such as underwater rescue, shipwreck salvage, and underwater archaeology, it delivers efficient and safe solutions. Based on operational requirements, the system incorporates salvage bags of varying specifications and load capacities, including small and medium-sized units, to accommodate objects of different scales and weights. Additionally, the system features retractable exhaust valves to ensure effective internal pressure control during salvage operations, thereby safeguarding operational safety.

II. Product Features:

1. Salvage Bag Configuration:

2 small salvage bags, each with a lifting capacity of ≥2000kg, suitable for retrieving lightweight underwater objects.

Two medium-sized salvage bags, each with a lifting capacity of ≥5000kg, suitable for retrieving heavier underwater objects or shipwreck debris.

2. Pull-type Exhaust Valve: All salvage bags are equipped with pull-type exhaust valves, facilitating air release during the salvage operation to ensure the bag's tightness and stability. When internal pressure becomes excessively high, the exhaust valve automatically vents pressure, effectively mitigating potential safety risks.

3. High-efficiency salvage capability: The system features a well-designed structure and robust salvage bags that withstand significant water pressure and tensile forces, ensuring successful salvage operations in complex underwater environments.

4. Simple Operation: The submersible salvage system is easy to operate, requiring only basic training for operators to master its use. Detailed operating guidelines are provided to ensure safe and reliable operations.

III. Application Scenarios:

Diving salvage systems are widely used in the following scenarios:

1. Underwater Rescue: Used in drowning incidents or diving accidents to recover missing persons or diving equipment.

2. Wreck Salvage: Used to recover sunken vessels or their wreckage, along with cargo or equipment aboard the ship.

3. Underwater Archaeology: Used during archaeological excavations to recover artifacts or relics from underwater cultural heritage sites or submerged ruins.

IV. Product Specifications:

Serial Number	Project Name	Technical Specifications
1	Production Standards	IMCA DO16
2	Safety factor	5: 1
3	Product Capacity	25KG-50T
4	Materials Used	SGS-certified high-strength PVC-coated fabric
5	Design	Underwater air lift bags feature either bottom-opening or closed parachute designs. Underwater air lift buoyancy bags include "commercial diving buoyancy bags" and "professional salvage buoyancy lift bags".
6	Stability	Underwater air lift bags also resemble teardrop shapes. Typically, bottom-open underwater air buoyancy bags are used for deep-sea salvage operations, as their parachute-like design ensures stable deployment and the open-bottom configuration enhances safety during heavy-load lifting. Bottom-sealed underwater air lift bags can serve as surface buoyancy aids or be converted into bottom-open buoyancy bags by activating their bottom release mechanisms.
7	Application	Suitable for subsea diving lifting, marine salvage, lifting and salvage operations, buoyancy bag salvage, and underwater buoyancy assistance.