AIR FLOW RATES
For existing vacumn blower
Using standard graduated dimmer switch control

Measured October 28, 2006
SETTING GAUGE KPH M / Min CM / Min FLOW L / Min VOLUME L / Min
    x 1000 / 60 x 100 / 1000 for 2.5 cm dia
           
A 20 333.33 33333 33.3 164
1/4 40 666.67 66667 66.7 327
1/2 56 933.33 93333 93.3 458
3/4 73 1216.67 121667 121.7 597
B 86 1433.33 143333 143.3 703
1/4 96 1600.00 160000 160.0 785
1/2 103 1716.67 171667 171.7 842
3/4 110 1833.33 183333 183.3 899
C 119 1983.33 198333 198.3 973
1/2 127 2116.67 211667 211.7 1038
D 130 2166.67 216667 216.7 1063
1/2 135 2250.00 225000 225.0 1104
+ 140 2333.33 233333 233.3 1145

Ideal Rates for Standard Smelter Sizes
Aneonometer Kph x 8.17 with 2.5 diameter tube
DIAMETER AREA CM @ 1.2 L/M SPEED KpH @ 1.5 L/M SPEED kph
20
314
377
46
565
69
25
491
589
72
883
106
30
707
848
102
1272
155
28 x 28
784
941
115
1411
173
30
706
950
116
1400
170

Measured 10/15/07
SETTING GAUGE KPH VOLUME L / Min
    for 2.5 cm dia
     
Red Dot (A) 21 174
1/4 33 274
1/2 52 432
3/4 59 490
B 67 556
1/4 81 672
1/2 87 722
3/4 93 772
C 97 805
1/4 102 847
1/2 106 880
3/4 109 905
D 111 921

Comparision - Blower volume over time

SETTING
10/26/08
10/15/07
10/27/08
       
Red Dot (A)
164
174  
1/4
327
274 240
1/2
458
432 413
3/4
597
490 461
B
703
556 518
1/4
785
672 636
1/2
842
722 690
3/4
899
772 747
C
973
805 779
1/4
1038
847 843
1/2
1063
880 890
3/4
1104
905 922
D
1145
921 954

(Anemometer MPS x 32 = LPM on standard 2.6 interior diameter pipe)

VOLUME TO SPEED
LpM KpH
   
400 49
500 61
600 73
700 86
800 98
900 110
1000 122
1100 135
1200 147
1300 159


Last Updated on 4/17/08

By Darrell Markewitz
Email: smelt@warehamforge.ca


Text and photography © 1998 - 2007, Darrell Markewitz