Rotational molding products
Polyethylene interception isolation warning float LLDPE
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Buoyancy Balls – Rotomolded HDPE Floating Spheres
Our buoyancy balls are manufactured via rotational molding in UV-stabilized HDPE, offering high impact resistance, long-term buoyancy, and corrosion-free performance in marine and freshwater environments. Each unit is engineered to deliver predictable net lift based on application-specific load and freeboard requirements.
Design Principle
Diameter is selected according to required net buoyancy (effective lift after subtracting shell and internal foam weight) or target freeboard height above waterline. All models incorporate internal EPS foam filling to ensure fail-safe buoyancy even if the shell is compromised.
Standard Models & Technical Specifications
| Model | Diameter (mm) | Net Buoyancy (kg) | Rope Hole Ø (mm) | Shell Weight (kg) | EPS Foam Weight (kg) |
|---|---|---|---|---|---|
| 30 Buoy | 300 | 10 | 15 | 2.0 | 0.3 |
| 35 Buoy | 350 | 15 | 18 | 3.5 | 0.5 |
| 40 Buoy | 400 | 25 | 18 | 3.5 | 0.7 |
| 50 Buoy | 500 | 55 | 20 | 4.5 | 1.3 |
| 60 Buoy | 600 | 100 | 25 | 6.5 | 2.3 |
| 80 Buoy | 800 | 230 | 30 | 16.0 | 5.4 |
| 100 Buoy | 1000 | 500 | 35 | 20.5 | 9.5 |
| 120 Buoy | 1200 | 750 | 35 | 38.0 | 18.0 |
Customization Options
Mounting Configurations: Single ear, double ear, or through-hole (central axial bore)
Dimensions: Non-standard diameters available upon request
Color: Standard options include international orange, yellow, blue, and black; custom colors supported
Surface Finish: Smooth or textured shell for anti-slip or branding integration