VEGA VEGASON 71 - D User Manual
Page 31
VEGASON 71 - D
31
7 Output results
7.6.6 Palmer-Bowlus-flume
Calculation of the actual flow value (Q)
The following formula can be used for calculation of the
actual flow for liquid levels < h
max
… > h
min
.
Q = K • h
1,86
D in inch
Q in m
3
/h
h in m
Assumed values for a calculation example
D =
12"
K =
3046 (derived from D)
h =
0,1 m
Calculation example
Q =
3046 • 0,1
1,86
= 42,046 m
3
/h
Programming acc. to calculation example
Q
max
= 42,042 m
3
/h
- Mode
0 - 82
, flow = 0042
- Mode
0 - 83
, multiplier = 0
- Mode
0 - 84
, time unit = 3
Explanation:
Q
max
= max. flow in m
3
/h
D
= tube diameter in inch
K
= flume specific factor
h
max
= max. height in mm or m
Selection of the actual flow (Q)
Flow schedule for usual flumes
D
K
Q
max
h
max
Q
min
h
min
in inch (Factor)
in m
3
/h
in mm
in m
3
/h
in mm
6"
1952
37,82
120
2,9
30
8"
2338
68,60
150
7,3
45
10"
2712
148,8
210
12,3
55
12"
3046
214,3
240
18,9
65
15"
3519
374,8
300
32,1
80
18"
3943
501,4
330
54,4
100
24"
4745
1074,0
450
114,5
135
30"
5488
2122,0
600
192,3
165
Note:
The data of above schedule relate to Palmer-Bowlus-
Flumes of Messrs. Plasti-Fab.
If a Palmer-Bowlus-Flume acc. to above values is used,
the value for Q
max
can be taken out of the respective
column and can be used for programming of mode
0 - 82
…
0 - 84
.
Programming acc. to selection Q
max
= 2122 m
3
/h
-
Mode
0 - 82
, flow = 2122
-
Mode
0 - 83
, multiplier = 0
-
Mode
0 - 84
, time unit = 3
D
D/2
D/2
D/4
D/4
h
max
D/6
K
30
°
30
°