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3 Installation
!
18
3.2.7
Nominal diameter and flow rate
The diameter of the pipe and the flow rate determine the nominal diameter of the sensor.
The optimum velocity of flow is 2...3 m/s. The velocity of flow (v), moreover, has to be
matched to the physical properties of the fluid:
x v < 2 m/s: for abrasive fluids
x v > 2 m/s: for fluids producing build-up
Note:
Flow velocity can be increased, if necessary, by reducing the nominal diameter of the
sensor (see Page 17).
Promag P
Flow rate characteristic values - Promag P (SI units)
Nominal
Recommended
diameter
flow rate
min./max. full scale value
[mm]
[inch]
(v ~ 0.3 or 10 m/s)
15
1/2"
4...100 dm
25
1"
9...300 dm
32
1 1/4"
15...500 dm
40
1 1/2"
25...700 dm
50
2"
35...1100 dm
65
2 1/2"
60...2000 dm
80
3"
90...3000 dm
100
4"
145...4700 dm
125
5"
220...7500 dm
150
6"
20...600 m
200
8"
35...1100 m
Flow rate characteristic values - Promag P (US units)
Nominal diameter
Recommended
min./max. full scale value
[inch]
[mm]
(v ~ 0.3 or ~ 10 m/s)
1/2"
15
1.0...27 gal/min
1"
25
2.5...80 gal/min
1 1/4"
32
1 1/2"
40
2"
50
10...300 gal/min
2 1/2"
65
16...500 gal/min
3"
80
24...800 gal/min
4"
100
40...1250 gal/min
5"
125
60...1950 gal/min
6"
150
90...2650 gal/min
8"
200
155...4850 gal/min
Full scale value
(v ~ 2.5 m/s)
3
/min
25 dm
3
/min
75 dm
3
/min
125 dm
3
/min
200 dm
3
/min
300 dm
3
/min
500 dm
3
/min
750 dm
3
/min
1200 dm
3
/min
1850 dm
3
/h
150 m
3
/h
300 m
flow rate
Full scale value
(v ~ 2.5 m/s)
6 gal/min
18 gal/min
4...130 gal/min
30 gal/min
7...190 gal/min
50 gal/min
75 gal/min
130 gal/min
200 gal/min
300 gal/min
450 gal/min
600 gal/min
1200 gal/min
PROline Promag 23
Factory settings
Pulse value
(~ 2 pulse/s)
3
3
/min
0.20 dm
3
3
/min
0.50 dm
3
3
/min
1.00 dm
3
3
/min
1.50 dm
3
3
/min
2.50 dm
3
3
/min
5.00 dm
3
3
/min
5.00 dm
3
3
/min
10.00 dm
3
3
/min
15.00 dm
3
3
/h
0.025 m
3
3
/h
0.05 m
Factory settings
Pulse value
(~ 2 pulse/s)
0.05 gal
0.20 gal
0.20 gal
0.50 gal
0.50 gal
1 gal
2 gal
2 gal
5 gal
5 gal
10 gal
Endress+Hauser
Low flow cut off
(v ~ 0.04 m/s)
3
0.5 dm
/min
3
1 dm
/min
3
2 dm
/min
3
3 dm
/min
3
5 dm
/min
3
8 dm
/min
3
12 dm
/min
3
20 dm
/min
3
30 dm
/min
3
2.5 m
/h
3
5.0 m
/h
Low flow cut off
(v ~ 0.04 m/s)
0.10 gal/min
0.25 gal/min
0.50 gal/min
0.75 gal/min
1.25 gal/min
2.0 gal/min
2.5 gal/min
4.0 gal/min
7.0 gal/min
12 gal/min
15 gal/min
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