Hydro- Pneumatic Fender

SunHelm Marine SH-DM Deep Marine Hydro pneumatic fender is a special version of the Pneumatic Fender developed for submarines. Hydro pneumatic Fenders are partially filled with water and air and are equipped with a counterweight in order to keep them in a vertical position. This ensures that the submerged hull is properly protected by the fender at all times. 

Hydro pneumatic Fenders require some special installation techniques to be installed. The performance of Hydro pneumatic Fenders is affected by the air:water ratio and the initial pressure.SunHelm would be pleased to receive your design input allowing us to engineer the correct type, size and overall layout of the Hydro pneumatic Fender suiting your requirements.

  • Navy use for submarine
  • Catamaran
  • Semi-submersible platforms
  • Drilling rigs

Related Product

Pneumatic Fender

Pneumatic fenders are marine equipment used to prevent collisions between ships, docks, and cargo ports.

Yacht Fender

Yacht fender play a role in berthing and protecting ships, mainly suitable for yachts, speedboats and small vessels.

Foam Filled Fender

The interior of the foam fender uses EVA foam material as the buffer medium and polyurea as the outer protective layer.

Foam Filled Fender

Foam filled fender effectively absorb the impact energy of ships,widely used in ports, offshore and STS operations.

Donut Fender

Donut fenders are used to fit into ports and effectively reduce collision and friction to ships.

Fixed Rubber Fender

Fixed rubber fenders are usually used to docking. it has many types:cell, cone, Cylindrical, D type, Extruded, Tugboat...

Hydro-Pneumatic Fender Characteristics

We have stock of pneumatic fenders in common sizes of STS.

Want to ship quickly?
No problem!


+86 (0)531 88255160

WhatsApp: +86 152 5419 6767

    Hydro pneumatic fender Structure



    Inner rubber:Rely on the fender to ensure the air tightness of the fender to prevent gas leakage and maintain the air pressure of the fender.

    Middle layer:The reinforcement layer is the skeleton layer of the fender, which is made up of multiple layers of glued with high strength cord fabric.

    Outter rubber:The outer rubber layer covers the outer surface of the fender to protect the fender from external force damage and wear.


    Fender Body: Pneumatic rubber fender body.


    Counterweight: used to balance buoyancy and pull the fender to prevent position shift caused by the impact of waves

    Install the fixed cable chain.


    Other accessories: including charging and discharging water and gas control devices, adjustment devices, etc.

    Diameter(mm)Length(mm)Energy absorption(KNm)Reaction force(KN)

    International Leading Pneumatic Fender Manufacturer

    SunHelm Marine Co., Ltd. is a Chinese manufacturer specializing in maritime products. SunHelm Marine currently has several large-scale modern factories and R&D centers. SunHelm Marine mainly produces pneumatic fenders, marine rubber fenders, foam fenders, hydro-pneumatic fenders, marine airbags, marine salvage airbag, caisson moving airbags and other products.

    Based on ship industry chain, SunHelm Marine has expanded its market layout, main business involves ship mooring and berthing, marine engineering,  port construction and other fields. SunHelm provides customers with systematic, comprehensive and creative services.

    After nearly 20 years of development, product and technology applications have covered more than 80 countries and regions in 7 continents, NANHAI became the well-known brand in the world.

    Hydro Pneumatic Fender4

    Our Products

    We are in the business of developing high performance marine rubber protections.  According to 20 years researching and developing, SunHelm Marine has abundant experiences in custom designing marine fenders and airbags to meet specific application needs. We are pride with ourselves on our quality and stand behind our products. 


    We commitment that we will try our best to solve all the questions for our customer. We welcome and valued your advice to us. We are not only your supplier but also your key of success and your partner of business.



    Let Us Know Your Needs!