Milnor 50040 - Page 16

ÊLaying Out Ducting (Metric Units)
Select ducting from the following table.
ÏData for Sizing Inlet and Exhaust Ducts for MILNOR Machines
Model D
(centi-
meters)
Meters
per
second
Losses (in millibars) Rectangular Dimensions
Per
100
Meters
90˚ Elbows H
(centi-
meters)
W
(centi-
meters)
R
(centi-
meters)
Smooth Round 3 Pc. Round Rect.
Short Long Short Long
50040 58040
1.7 M
3
/sec
45.7 10.3 2.526 0.25 0.17 0.32 0.27 0.22 35.6 50.8 38.1
38.1 48.3 36.2 40.6 43.2 32.4
Dimensions of other equivalent rectangular elbows
43.2 40.6 30.5 48.3 38.1 28.6 50.8 35.6 26.7
58058
2.5 M
3
/sec
50.8 12.1 3.018 0.32 0.22 0.42 0.35 0.30 40.6 55.9 41.9
43.2 50.8 38.1 45.7 48.3 36.8
Dimensions of other equivalent rectangular elbows
48.3 48.3 36.2 48.3 45.7 34.3 50.8 43.2 32.4 55.9 40.6 30.5
58058
2.5 M
3
/sec
55.9 10.0 1.804 0.22 0.15 0.30 0.25 0.20 45.7 61.0 45.0
48.3 55.9 41.9 50.8 55.9 41.9
Dimensions of other equivalent rectangular elbows
55.9 50.8 38.1 55.9 48.3 36.2 61.0 45.7 4.3
58080 Consult MILNOR factory 72072
4.7 M
3
/sec
76 10.3 1.255 0.21 0.17 0.28 0.24 0.14 59 84 79
Dimensions of other equivalent rectangular elbows
61 79 77 64 76 73 66 71 71 69 69 69 72 66 68 75 63.5 62 78 61 60 82 58 58
To determine the back pressure of your ducting, complete the following formula:
Pressure Drop = Length of Straight Duct (Meters)/100 x Loss Per 100 Meters (from table)
+ Number of Short Elbows x Loss (from table) + Number of Long Elbows x Loss (from table) + Maximum Back Pressure from Lint Collector (millibars)
Example (see illustration below): Pressure Drop (P.D.)= .337 + .054 +.15 + .043 + .30 + .082 + .622 = 1.588 millibars
ÎFIGURE 3 (MSIN0105AE)
ÎExample Duct Layout (Metric)
HOW TO SIZE INLET AND DISCHARGE AIR DUCTING MSIN0105AE/9819AV (3 of 3)
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