Submarine Rubber Fender (Hydro Pneumatic Fender)
What is Submarine Rubber Fender
A submarine rubber fender is a special type of pneumatic fender designed for underwater and below waterline protection. It is mainly used for submarines, semi submerged vessels, and offshore structures where the impact point is lower than the water surface.
Unlike standard pneumatic fenders, submarine fenders are filled with a combination of air and water and equipped with counterweights. This structure allows the fender to stay in a vertical position and maintain stable contact with submerged hull areas.
These fenders are widely used for vessels that operate under challenging docking conditions, especially where traditional fenders cannot provide effective protection.
Submarine rubber fenders are commonly used for submarines, catamarans, semi submerged platforms, drilling rigs, and specialized naval vessels.
Application of Submarine Rubber Fender
Submarine fenders are designed for:
Submarine docking and protection
Semi submerged vessel berthing
Drilling rigs and offshore platforms
Catamarans and special marine structures
Naval and military marine operations
Ports with deep draft and underwater contact requirements
Working Principle of Hydro Pneumatic Fender
The hydro pneumatic fender works by combining air pressure and water ballast inside the fender body. This balance allows the fender to adjust its position underwater and maintain stable buoyancy.
When the vessel makes contact, the internal medium absorbs impact energy and reduces reaction force on the hull. This ensures safe docking even under tidal changes and underwater impact conditions.
Key Features of Submarine Rubber Fender
Adjustable performance through air and water ratio
Stable vertical positioning underwater
Low hull pressure during contact
Adaptable to tidal variation and changing water levels
Reduced installation and maintenance requirements
Suitable for deep water and underwater berthing conditions
Submarine Fender Specification
| Size (Diameter x Length) | Working Pressure | Water Ratio | Energy Absorption | Reaction Force | Hull Pressure | Deflection |
|---|---|---|---|---|---|---|
| 1500 x 6100 mm | 0.5 | 60 percent | 12 tf m | 56 tf | 14 tf per m² | 51 percent |
| 1700 x 7200 mm | 0.5 | 60 percent | 17 tf m | 72 tf | 13 tf per m² | 49 percent |
| 2500 x 5500 mm | 0.5 | 70 percent | 27 tf m | 102 tf | 15 tf per m² | 40.5 percent |
| 2500 x 7700 mm | 0.5 | 60 percent | 46 tf m | 141 tf | 15 tf per m² | 48.5 percent |
| 3300 x 6500 mm | 0.5 | 70 percent | 50 tf m | 143 tf | 15 tf per m² | 40.5 percent |
| 3300 x 10600 mm | 0.5 | 54.5 percent | 136 tf m | 301 tf | 16 tf per m² | 54 percent |
| 4500 x 9000 mm | 0.8 | 85 percent | 23 tf m | 75 tf | 11 tf per m² | 19.5 percent |
Customized sizes are available based on project requirements.
After Sales Service
We provide full technical support and reliable after sales service to ensure long term performance and customer satisfaction.
Our services include:
Twenty four hour online technical consultation
Twenty four months warranty for manufacturing quality issues
Free repair service during warranty period
Lifetime maintenance support and repair assistance
Frequently Asked Questions
What materials are used in submarine rubber fenders
The main materials include natural rubber, synthetic tire cord fabric layers, and customized metal hardware components.
Are you a manufacturer or trading company
We are a professional manufacturing factory located in Qingdao, China, close to Qingdao port and airport for efficient global shipping.
Do you support OEM service
Yes, OEM and customized production are available based on project requirements.
What is the delivery time
Delivery time depends on order quantity and model. Usually it is around 7 to 15 working days.
What payment methods are accepted
We support T T, L C, Western Union, Paypal and other common international payment methods.
Please contact us for more informatoin about the submarine rubber fenders.
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