AKVA group
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Plastic Cages

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Plastic Cages

Designed for extreme conditions

Many have tried to copy these products, but none have managed to match the genuine Polarcirkel designs and quality builds. Plastic cages started out as small single pipe circles, but now our largest models approach 200m circumference, and with floating pipes of 500mm diameter. Both circular and square cage systems are available. Combined with AKVA group´s global sales and service network, the Polarcirkel Cage is well proven and recognized worldwide.
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A well proven concept
The Polarcirkel Cages have a proven track record for use in rough weather, such as here on Norway’s stormy coastline at 70° North.
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Safe and stable platform
All Polarcirkel Cages are available with safe and sturdy walkway sections as well as strong built-in suspension system for sinker tubes.
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State-of-the-art machinery
Sophisticated machinery produces pipes in a wide range of models and the mounting is done by highly experienced and certified personell.
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Tested in arctic areas
Polarcirkel PE brackets are tested in arctic areas to withstand extreme icing such as here in the Russian Sea.
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Decades of experience
Newspaper photo presenting the first Polarcirkel cage in 1974.
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Development
Photos showing today’s large 500mm cages compared to the 225mm “Gigante” cage 20 years ago!

Unique features

plastic cages

The World´s leading cage supplier

Polarcirkel is the world’s leading supplier of plastic cages, and more than 43.000 cages have been delivered since we invented the plastic cage in 1974! The cages are made from raw materials especially suited for the dynamic loads of the sea and are based on decades of experience world wide. The Polarcirkel Cages are available in a wide range of models, shapes and sizes to suit individual needs.

AKVA group invests heavily in innovative and professional R&D in order to remain the leading supplier of cages; not only to improve products in the short term, but also to look into the future of tomorrow’s demands for cage technology.

Polarcirkel quality and certification

All Polarcirkel Cages are manufactured and assembled in accordance with AKVA group’s Quality Assurance System (ISO 9001) which is certified by DNV (Det Norske Veritas). All cages in Norway are designed in accordance with NS 9415 (Norwegian Standard 9415 for cage farming equipment to prevent fish escape).
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Corrosion free brackets
Forget corrosion! The photo is showing a Polarcirkel bracket after ten years in saltwater!
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Extra strong railings
Polarcirkel Cages are known for their strong railings and high reserve buoyancy, which is crucial in case of sudden excessive net loads or icing.
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Suited for artic conditions
For areas prone to icing another critical advantage of the Polarcirkel HDPE brackets is that they will not ice up as steel brackets do.
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Strong Polarcirkel PIM Brackets

Extensive use of PE (Polyethylene) in our PIM (Pressure Injection Moulded) brackets eliminates corrosion, minimizes expensive and difficult maintenance, and substantially increases cage lifespan compared to steel brackets. This is especially important in areas with high salinity, warm water temperatures and choppy seas.

Only strong and high quality PE is used for Polarcirkel brackets, while many suppliers use weak and low quality rotationally moulded Medium and Low Density Polyethylene. This makes the Polarcirkel brackets superior in terms of structural strength, durability and UV resistance. This is especially important in high energy offshore farm sites and areas with high UV radiation from the sun.

For areas prone to icing, such as Norway and Canada, another critical advantage of the Polarcirkel PE brackets is that they will not ice up as steel brackets do. Icing is a dangerous safety problem for all floating structures, including cages. Heavy ice overloads the cage, reduces stability and jeopardizes overall cage integrity. As the name indicates, the Polarcirkel cages are well suited for extreme arctic conditions!

All Polarcirkel Cage designs are carried out by our professional R&D department. Independent marine engineering consultants are also involved in advanced static and dynamic load calculations to ensure all designs meet or exceed expected real life loads as well as applicable industry standards.
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