Ductulator Ltd.

Width [mm] Height [mm] Length [mm] Quantity [pcs]

One Loose Flange

Diameter[mm] Length [mm] Quantity [pcs]

Note: Spiral Duct Diameter Size [mm]: 80, 100, 125, 160, 200, 250, 315, 350, 400, 450, 500, 560, 630, 710, 800, 900, 1000, 1120, 1250, 1422, 1500

Diameter [mm] Length [mm] Quantity [pcs]

Insulation Acoustic Insulation

Note: Standard Flexible Duct Diameter Size [mm]: 80, 100, 125, 160, 200, 250, 315, 350, 400, 450, 500

Vane guides Width [mm] Height [mm] Length [mm] Quantity [pcs] Angle [°] Radius [mm] Width₂ [mm] Length₂ [mm]

Note: Leave width2 field empty if width = width2, it will autocomplete.
Note: For box shape elbow, radius = 0.

Width [mm] Height [mm] Width2 [mm] Height2 [mm] Simetric Width Simetric Height Length[mm] Quantity[pcs]

The air speed is based on flow, width and height. Make sure width < width2 and height < height2. Width2, Height2, Straight/Simetric Width/Height are optional and recorded in the table.The picture show a reduction with simetric width and straight height

Standard Spiral Duct/Elbow Diameter Size [mm]: 80, 100, 125, 160, 200, 250, 315, 350, 400, 450, 500, 560, 630, 710, 800, 900, 1000, 1120, 1250, 1422, 1500

The air speed is based on flow and diameter. Pressure loss is calulated for an elbow with 90° angle with a radius = 0.5*Diameter. The angle is optional and recorded in the table. Standard angles are 15, 30, 45, 90°. Standard R/D ratio is 0.5 & 1

Standard Spiral Duct/Elbow Diameter Size [mm]: 80, 100, 125, 160, 200, 250, 315, 350, 400, 450, 500, 560, 630, 710, 800, 900, 1000, 1120, 1250, 1422, 1500

Flow[m³/h] V[m/s] ΔP_Linear[Pa] P_Dynamic[Pa]

Rectangular Duct Size W/H/L[mm]
W[mm] H[mm] L[mm] Qty[pcs.]

Rectangular Duct Lateral Area / Free Area / Perimeter / Equivalent Diameter / Hydraulic Diameter
L_Area[m²] F_Area[m²] P[mm] E_D[mm] H_D[m]

Rectangular Duct Options:
One Loose Flange

Flow[m³/h] V[m/s] ΔP_Linear[Pa] P_Dynamic[Pa]

Round Duct Size D/L[mm]
D[mm] L[mm] Qty[pcs.]

Round Duct Lateral Area / Free Area / Perimeter / Equivalent Rectangular Height for W=D
L_Area[m²] F_Area[m²] P[mm] E_Re[mm]

Flow[m³/h] V[m/s] ΔP_Linear[Pa] ΔP_Local[Pa] ΔP_Total[Pa] P_Dynamic[Pa]

Flexible Duct Size D/L[mm]
D [mm] L [mm] Quantity [pcs]

Flexible Duct Lateral Area / Free Area / Perimeter
L_Area[m²] F_Area[m²] P[mm]

Flexible Duct Options:
Insulation Acoustic Insulation

Note: A flexible duct, type spiral wire core helix, not completely stretched, is considered.
Note: Linear pressure loss is based on an absolute roughness ε=2mm
Note: Due to the compression of the wire core helix, a compensation factor for diameter and length is considered: f_D=0.9 and f_L=0.7. Therefore, free area is lower than expected resulting in a higher air speed.
Note: Local pressure loss is based on one 45° and one 90° elbow per piece of flexible duct, ζ_45°=1, ζ_90°=1.5

Flow[m³/h] V[m/s] ΔP_Local[Pa] P_Dynamic[Pa]

Rectangular Elbow Size W/H/L/W2/L2[mm], Angle α, Radius
W[mm] H[mm] L[mm] W₂[mm] L₂[mm] α[°] R[mm] Qty[pcs]

Rectanular Elbow Lateral Area / Free Area / Perimeter
L_Area[m²] F_Area[m²] P[mm]

Rectangular Elbow Options:
Turning Vane Guides

Note: The air speed is based on flow & min(width, width2).
Note: Lateral area formula can be found on github page.
Note: Local loss coefficient formula can be found on gihub page.

Flow[m³/h] V[m/s] ΔP_Local[Pa] P_Dynamic[Pa]

Rectangular Reduction Size W/H/L and W2/H2/L2[mm]
W[mm] W2[mm] H[mm] H2[mm] L[mm] Qty[pcs]

Rectangular Reduction Lateral Area / Free Area / Perimeter / Angle Width / Angle Height
L_Area[m²] F_Area[m²] P[mm] α_Width[°] α_Height[°]

Rectangular Reduction Options:
Simetric Width Simetric Height

Round Elbow Size D/L[mm]
Diameter [mm] Angle [°] R/D Ratio

Round Elbow Outside/Free Area/Perimeter
O. Area[m²] F.Area [m²] Perimeter [mm]

Round Elbow Options:
No options available

Round reduction Size D/L/D2[mm]
Diameter [mm] Length [mm] D2 [mm]

Round Reduction Outside/Free Area/Perimeter
O. Area[m²] F.Area [m²] Perimeter [mm]

Round Reduction Options:
No options available