Plate-Helical Type Finned Coils
Plate Fins - Each fin is cut from a sheet of flat material, then punched in a specific pattern that accommodates all the coil tubes. This is similar to stacked sheets of ring binder notebook paper. Over 20 different combinations of tube sizes and center patterns are available.
Helical Fins - (Also referred to as "Spiral Wrapped"), A narrow strip of material is tension wound onto individual coil tubes, like threads on a screw. Individually finned tubes can be positioned on nearly any desired tube center distance.
These are the most common fin styles on coils, each having its advantages, and allowing Super Radiator Coils to design the right coil for your particular application, and your special requirements.
Plate Fins |
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Helical Fins |
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Advantages |
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Advantages |
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Low air friction |
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Increase thermal conductivity |
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Easy to clean/traps less dirt |
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Less fin material |
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Easy to apply coatings |
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Able to replace a single damaged tube |
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Tubes interlocked together |
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Compact fin bundle |
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Better vibration/tube sag strength |
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Vary tube face and row centers/closer fit for replacement coils |
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Wide fin spacing |
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Maintain fin bond at high temperatures |
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Handle ice/frost build-up |
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Use exotic tube materials |
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Tight fin-to-tube bond |
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Use extremely thick walled tube or pipe |
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Allows surface enhancements for increased thermal performance |
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Reverse tube pitch to drain a multi-row coil for vertical airflow |
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Hydrostatic leak test each tube (standard) |
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Accommodates header/tube thermal expansion on tall/long coils |
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Position headers far from the coil |
Plate fins are also available with optional surface enhancements.
These create different air flow patterns, boosting the coils ability to transfer heat. But they also create more air resistance. So the coil design has to balance its size, fin density, and fin enhancement to an acceptable air friction that the fan or system can accommodate.
These coil fin styles and enhancements are available on our basic coil product lines. They are also offered on many custom/specialized coils, depending on the tube size and materials required.
If you have any questions as to which style or enhancement is best for your coil application, please contact a Super Radiator Coil sales representative or our nearest facility .