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| Oval Tube forming machine |
 |  |  |   | | Where space limitations prevent the use of round spiral duct, Oval tube is the answer. | | Main advantages of oval tube |
| Better air flow | Fewer hangers | | Lighter weight | Joints easier to seal | | Easier to install | Often requires less space | | Longer length between joints | Aesthetically pleasing | | Very good lock seam, without leakage | Fewer or no joints | | 1 produced by full-automatic, clean and dustless
2 the leakage rate is extremely low. only 0.02
3 the lock seam is tight , the inner lock seam is smooth and leak less; the lock seam also has the reinforcement function
4 the structure is of high intensity, good rigidity, avoiding second noises
5 longer continuous length; good coherent in tube size, easy &convenient for noises
6small occupying space in height , suitable for the buildings of insufficient layer height | | Main technical data |
| Max Sheet Thickness | 1.2mm | | Max. Tube Length | 3100mm | | Easier to install | 330~1500mm | | Size of flat oval | 150/400mm~500/1550mm | | Motor Power | 22kW, 380V, 3 Phase, 50Hz | | Dimension | 5500 x 1200 x 1300mm | | weight | 3300kg | | | Compare between oval duct and rectangular duct |
In same acreage, girth of rectangular is about 20% more than that of oval, e.g., rectangular needs more materials and so the cost is higher.
1resistance
Media flows in oval duct is stable, vortex is not so easily occurred.
When media flows in rectangular duct, resistance is high ;is easily occurred.
2 Wet acreage
Acreage of oval S=3.14×1/2×2×0.5×0.5=1m2
Perimeter of oval=3.14×[1.5×(1+0.25)-㏒(1×0.25)]=4m
Section acreage of rectangles=2×0.5=1m2
Girth of elipseL=(2+0.5) ×=5m
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