Parachute-type underwater buoyancy salvage bags are typically designed with an open or closed bottom, resembling a water droplet. Their main body is made of SGS certified high-strength PVC-coated fabric, joined by high-frequency welding for a strong seal. A top-mounted air release valve allows for convenient buoyancy control via a bottom rope. Some also feature an automatic safety valve for safe use.
1. Production Process: High-Frequency Welding
2. Buoyancy: 100-110,000
3. Material: High-Strength PVC Coated Fabric
Model | Full load/kg | Volume/m3 | Full load Height (m) | Full load Maximum diameter (m) | Weight/kg | Package/m3 |
1T | 1000 | 1 | 1.90 | 1.20 | 19 | 0.7 |
2T | 2000 | 2 | 2.30 | 1.50 | 23 | 0.7 |
3T | 3000 | 3 | 2.70 | 1.70 | 28 | 0.7 |
4T | 4000 | 4 | 2.90 | 1.90 | 52 | 1.1 |
5T | 5000 | 5 | 3.40 | 2.20 | 66 | 1.1 |
6T | 6000 | 6 | 3.40 | 2.30 | 84 | 1.1 |
8T | 8000 | 8 | 3.60 | 2.40 | 104 | 1.1 |
10T | 10000 | 10 | 3.85 | 2.60 | 110 | 1.1 |
I2T | 12000 | 12 | 4.10 | 2.90 | 124 | 1.1 |
15T | 15000 | 15 | 4.30 | 3.00 | 128 | 1.1 |
20T | 20000 | 20 | 6.00 | 3.40 | 149 | 1.1 |
25T | 25000 | 25 | 6.10 | 3.90 | 180 | 1.5 |
35T | 35000 | 35 | 6.80 | 4.30 | 210 | 1.5 |
40T | 40000 | 40 | 7.36 | 4.50 | 280 | 1.8 |
50T | 50000 | 50 | 7.80 | 5.10 | 420 | 1.8 |
80T | 80000 | 80 | 8.40 | 5.40 | 660 | 2.4 |
100T | 100000 | 100 | 9.60 | 5.80 | 830 | 3.0 |
110T | 110000 | 110 | 10.60 | 5.90 | 900 | 3.0 |
Compared to rigid buoys, the buoy is foldable and storage-friendly, with transportation costs only 1/3-1/2 of those of rigid buoys. It's particularly suitable for operations in remote waters or areas with limited access.
Buoyancy adjustment is highly precise, with a bottom valve enabling "micro-buoyancy control" to prevent heavy objects from colliding with the water surface during ascent.
It is highly weather-resistant, with a PVC coating that resists corrosion from seawater and salt spray. With long-term storage (in a dry environment), it offers a service life of 5-8 years.
Before use, inspect the airbag for damage (test the seal by inflating it) and ensure the hanging points are secure to avoid unexpected underwater malfunctions.
Strictly control the inflation speed (recommended inflation should not exceed 1/4 of the airbag's volume per hour) to prevent localized stress and rupture.
When operating underwater, adjust the buoyancy calculation based on water depth and seawater density. (Freshwater buoyancy is slightly lower than seawater, so pre-calibration is required.)
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