Benefits of Twin Keel Design Over Traditional Tail Tube Designed Buoys
The free-standing design of twin keel buoys provides natural stability on deck of vessel resulting in:
Twin keel design allows a buoy to stand on a flat surface, also
Modular free-standing design with principal components moulded from polyethylene and with all exposed structural elements made from Grade 316 Stainless Steel:
Sealite manufactures their marine buoys on-site with state-of-the-art Rotational Moulding equipment using UV-stabilised polyethylene. Polyethylene is one of the most common plastics used today and due to it’s light weight, strength and versatility it is used to make bottles, toys and even bulletproof vests.
Sealite uses a Hexene co-polymer based Linear Low-Density Polyethylene resin (LLDPE) which is specifically designed for rotational moulding applications. LLDPE has a higher tensile strength and exhibits greater impact and puncture resistance compared to some other plastics. It has been chosen as the material for Sealite marine buoys because of its high Environmental Stress Cracking Resistance (ESCR), toughness, flexibility and minimal impact on the environment.
Why use Virgin Polyethylene?
Surviving Harsh Climates
Marine buoys need to be able to survive some of the harshest conditions known. Sealite’s buoys are built to withstand extreme elements of icing, cyclonic winds, salt-spray, prolonged UV exposure and tropical humidity. The LLDPE compounds used to manufacture Sealite’s buoys have been especially developed to survive harsh environments and the destructive effects of the sun’s ultra violet rays. By using UV-stabilised polyethylene, the marine buoys are given additional protection from the long-term degradation effects of UV exposure.
Rotational moulding of polyethylene allows Sealite to manufacture complex shapes which are moulded in one piece making a robust product with excellent impact strength. In the unlikely event of damage, the buoys can be easily repaired.
Sealite’s polyethylene buoys require minimal maintenance. The buoys never require painting because they are manufactured using coloured pigments which permeate all of the way through the polyethylene. Because the buoys do not require painting on station, if suitable vessels are available, maintenance can be carried out at sea to remove marine growth making maintenance easier and more economical.
Closed-cell Polyurethane Foam
Many of Sealite’s marine buoys come with closed-cell polyurethane foam as standard or as an optional extra.
Foams are made up of a mass of air bubbles and are classified as open-cell or closed-cell. In open-cell foam the individual cells are interconnected, whereas in closed-cell foam each cell is completely enclosed by a thin membrane of polyethylene, are packed close together and will not compress or settle over time.
Some of the advantages of choosing buoys filled with closed-cell polyurethane foam are
The increasing awareness of the need to protect our environment for future generations has lead to more and more consumers demanding environmentally friendly products. Innovations and advances in technology used by the plastics industry are helping Sealite to contribute to a more sustainable world.
Many pigments used in the production of other polyethylene products are made from heavy metals such as Lead, Cadmium and Chromium which, even in small concentrations, are toxic to humans and the environment. There have even been links between heavy metals and a range of health issues such as cancer, kidney disease and learning disabilities.
Even though there are not always regulations in place in some regions restricting the use of heavy metals in pigments, Sealite has made the decision to only use polyethylene which is heavy metal free and contains absolutely no toxic chemicals. By making this choice, Sealite is making a difference and contributing to a safer environment by reducing the risk of air and water pollution throughout their roto-moulding process.
At the end of their working life products that contain heavy metals cannot be recycled and, even if there are only traces of toxic heavy metals, the used product cannot be burnt for heat recovery, reprocessed or even buried!
Sealite buoy products are made from recyclable materials and it is recommended that they be recycled at the end of their working life. As a service to customers, individual components and products at the end of their service life may be returned to Sealite for safe and responsible recycling.
“[Re: Sealite Wins Duke ™s Choice Award for Java Technology & the Environment “ Sealite GSM monitoring & control system], The team at Motorola were extremely impressed with Sealite’s innovative integration of the G24-Java wireless module in their GSM Monitoring & Alarm System.”
“As one of your new distributors (Belize and Honduras, Waller Marine Belize LTD), I would like to express my congratulations to you and your people in providing reliable, dependable and inexpensive products. Formerly we were distributors for a Canadian made product but these were found to be too expensive for the market and also offered only difficult and complicated programming. Our first order of lights from you (SL15 ™S) took only four days to arrive from Aussie Land, when I opened the box they were still flashing. I tested a SL60 (white) for four days (steady on) before it required a recharge…remarkable. I will be placing another order with Dana shortly keep up the good work.”
-Capt Andy Suddes
“[Re: Installation of WindTalker for kite-surfing club], The WindTalker „ is a big success here in Cyprus, thanks to your after sales support the unit is now functioning perfectly.”
“We choose to sell Sealite … this is a long story, well we treat Sealite as our own and the relationship we have developed with Jeff and Chris and their attitude and commitment towards growing Sealite to this stage is remarkable. We feel at home when talking to them and the staff of Sealite and this in turn gives us more security and strength in selling products in India.”
-Aliasgar E Patrawala
“[Re: Sealite Solar-Powered LED Area Lighting system], We chose the Sealite system for the Jacobs Well Queuing Pontoon due to our previous experience with Sealite ™s product, its durability and construction.”
“I just wanted to say thank you for the light and bracket Sealite supplied to Birkenhead Marina. As the other lights (old ones) need new batteries I will be replacing them with new lights from Sealite and the same brackets that you supplied with the light we received last week … Your product is excellent and the system of setting the light is good also. Thanks again for all your trouble.”