Spiral duct machine standard

When designing spiral ducts, consider factors such as noise, material, energy consumption, installation space, and wind speed within the allowable range. Avoid sudden changes in wind speed and direction. Design the duct in a square shape with an aspect ratio no greater than 8:1; generally, it should be within 4:1.

Spiral ducts should be made of smooth air pipe. Material variations and installation processes can cause discrepancies between actual and designed resistance. Therefore, a safety factor should be considered when selecting fans and motors. Avoid conflicts between ductwork and other building components. If this is unavoidable, use smooth transitions. The length should be greater than 3 meters.

When the wind speed in the duct is high, the duct is small and the duct is saved, leaving little space for construction. However, high wind speeds increase system resistance, fan pressure, power consumption, and noise. Using lower wind speeds will have the opposite effect. Therefore, an economical wind speed value is essential when selecting wind speed values.

Currently, spiral ducts are widely used in ventilation projects. They offer a high-quality appearance. The molded air duct features a lubricated inner wall and a smooth outer wall. The spiral ribs formed by the interlocking outer wall are evenly distributed, resulting in a stronger ribbed structure than conventional interlocked ducts.

Because it is machined, it reduces compensation and operational errors, ensuring airflow is tight and air leakage is significantly less than current standards and specified values. The coil exhaust unit is stronger, and with a reduced coil thickness for the same size, the duct length is longer than conventional ducts. The number of duct sections of the same length is significantly reduced. Furthermore, a non-flange connection reduces raw data.