Endress+Hauser Promass 84F, Техническая информация

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Proline Promass 84F
20 Hauser
Pressure loss Pressure loss depends on the properties of the fluid and on its flow.
The following formulas can be used to approximately calculate the pressure loss:
Pressure loss coefficient
a0001396
Pressure loss diagram for water
Reynolds number
a0004623
Re
≥
2300
1)
a0004626
Promass F DN 250
a0012135
Re < 2300
a0004628
Δ
p = pressure loss [mbar]
ν
= kinematic viscosity [m
2
/s]
g
= Mass flow [kg/s]
ρ
= fluid density [kg/m
3
]
d = inside diameter of measuring tubes [m]
K to K2 = constants (depending on nominal diameter)
a = 0.3
b = 91000
1)
To compute the pressure loss for gases, always use the formula for Re
≥
2300.
DN
d[m] K K1 K2
[mm] [inch]
8 3/8" 5.35 · 10
–3
5.70 · 10
7
9.60 · 10
7
1.90 · 10
7
15 ½" 8.30 · 10
–3
5.80 · 10
6
1.90 · 10
7
10.60 · 10
5
25 1" 12.00 · 10
–3
1.90 · 10
6
6.40 · 10
6
4.50 · 10
5
40 1½" 17.60 · 10
–3
3.50 · 10
5
1.30 · 10
6
1.30 · 10
5
50 2" 26.00 · 10
–3
7.00 · 10
4
5.00 · 10
5
1.40 · 10
4
80 3" 40.50 · 10
–3
1.10 · 10
4
7.71 · 10
4
1.42 · 10
4
100 4" 51.20 · 10
–3
3.54 · 10
3
3.54 · 10
4
5.40 · 10
3
150 6" 68.90 · 10
–3
1.36 · 10
3
2.04 · 10
4
6.46 · 10
2
250 10" 102.26 · 10
–3
3.00 · 10
2
6.10 · 10
3
1.33 · 10
2
Re =
2 · g
p n r
· d · ·
D r
p = K · · ·
0.25 1.85 –0.86
g
n
D
p = · K
a
1- a +
e
b · (v - 10-6)
· · ·
g
1.85 -0.86
r
v
0.25
D
p = K1 · · + g
n
K2 · ·
0.25 2
g
n
r
DN 50 DN 40
DN 25
DN 8
10000
1000
100
10
1
0.1
0.001
0.01
0.1
1
10
100 1000
DN 15
DN 80
DN 100
[mbar]
[t/h]
DN 150
DN 250