Economical Spiral Tube Cooling System that's easy to install.
Easy to expand cooling capacity and easy to maintain. The Duramax Demountable Keel Cooler 90/10 cupronickel spiral tube design offers superior heat transfer and design flexibility. It's an economical outboard closed solution to cool main and auxiliary engines on steel-hull vessels.![.](/assets/images/RuleHeat.gif)
![.](/assets/images/RuleHeat.gif)
90/10 cupronickel spiral tube is the heart of the cooler
The unique design of the tubes enhances the surface and creates a turbulent flow to boost heat transfer. In fact, the forced helical motion of the coolant flow extracts heat almost twice as fast as most hull-welded steel channel coolers.
![cool flow](/assets/images/tube-flow.jpg)
Easy to expand cooling capacity
If you need to re-power or add additional heat sources, an additional bank or level of tubes can be added to single bank system to double your cooling capacity.
![single](/assets/images/sprial-single_ENG.gif)
![double](/assets/images/sprial-double_ENG.gif)
Engineered for fast, economical installation
The Demountable Keel Cooler is pre-fitted to install in one-fourth the time of a channel steel cooler. All hardware is included. Hardware and components are pre-drilled and tapped. The demountable cooler is flexible to allow for stress-free bending to hull curvature. It can be installed on the exterior or recessed into the hull. Protective shielding recommended.
![.](/assets/images/RuleHeat.gif)
![.](/assets/images/RuleW.gif)
Advantages for shipbuilders as well as owners.
- Easily expandable if re-powering
- Modular design simple to install
- Can combine multiple heat sources
- Lower installation cost than steel channel coolers
- Tubes conform to most curvatures
- Tubes and parts in stock, for quick easy repair
- No through-hull fittings
- Eliminates inboard sea chest
- Built to match internal plumbing
- Covers wide range of cooling capacities
- Excellent resistance to corrosion and erosive effects of seawater
- Minimum standoff from hull
![demount](/assets/images/DemountInset1.gif)
![demount](/assets/images/DemountInset2.gif)
![demount](/assets/images/DemountInset3.gif)