ABB TRIO-WIRL ST4000 User Manual

Vortex Meter (TRIO-WIRL V) 3 - 12 PN25080
TRIO-WIRL INSTRUCTION MANUAL
1
Valid for 0.03 < Density < 0.08. Consult factory for densities < 0.03 lb/ft
3
.
3.5.1.1 Example for Gases:
Determine the flowmeter size for metering 98,700 scfh
(Q
S
) CO
2
; temperature 185
o
F, pressure = 72 psia.
Refer to Section 3.5 for equations.
ρ
S
= 0.1149 lb/ft
3
(CO
2
) (From Table 3-2)
1. Convert ρ
S
to ρ :
=0.46 lb/ft
3
2. Convert Q
s
to Q
v
:
Select 3 in. meter size (Q
vmax
= 33,500 acfh). Refer to
Tab l e 3-1.
3. Pressure drop at ρ = 0.462 lb/ft
3
:
Q
v
= 24,653 acfh
4. Range start value at ρ = 0.46 lb/ft
3
(see Table 3-3)
Q
Vmin
= 1138 acfh
3.5.1.2 Pressure Drop, Gas/Superheated Steam
See Figure 3-14 for Air (at 70
o
F, 1 4 . 7 ps i a, ρ = 0.0749
lb/ft
3
). For other fluid densities the pressure drop can
be calculated using the following equation:
Where:
∆p’ = Pressure drop, fluid [psi]
∆p = Pressure drop, air [psi] (from Figure 3-14)
3.5.1.3 Flowrate Saturated Steam [lb/h]
Example: Determine the flow range for a 2”/DN50 at
100 psig
From Table 3-4: 2”/DN50: 385 - 4,055 lb/hr
Additional information:
Sat. steam temp. = 338
o
F
Saturated Steam Density = 0.255 lb/ft
3
TABLE 3-3. MINIMUM & MAXIMUM FLOWRATES VS. DENSITY, GASES & STEAM
Q
vmin
[ACFH]
Qvmax
[ACFH]
Freq. [Hz]
at Qvmax
Density <0.08
1
0.09 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 >2.0
Meter Size
Inch DN
1/2 15 180 180 170 110 90 78 70 62 58 55 52 48 35 780 1840
1 25 425 320 310 220 190 170 150 130 120 110 100 95 70 2900 1825
1-1/2 40 740 700 680 480 390 320 290 280 250 220 210 200 160 12000 2000
2 50 1500 1500 1500 950 790 680 600 540 500 480 440 410 300 15900 1250
3 80 2750 2600 2400 1800 1400 1200 1100 970 900 820 790 730 680 33500 760
4 100 4240 4000 3900 2800 2200 1900 1800 1700 1600 1400 1300 1200 1100 63500 650
6 150 9200 8200 8000 7000 7000 7000 7000 7000 7000 7000 7000 7000 7000 143000 425
8 200 14800 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 240000 310
10 250 29000 29000 29000 29000 29000 29000 29000 29000 29000 29000 29000 29000 29000 424000 235
12 300 45900 45900 45900 45900 45900 45900 45900 45900 45900 45900 45900 45900 45900 600000 190
ρ 0.1149
72
14.7
----------
530
460 185+
------------------------
×=
Q
v
98700
0.1149
0.46
----------------


24653acfh==
∆p′
0.46
0.0745
----------------
0.4 2.5psi=×=
p'∆
ρ
0.0749
----------------
p∆×=

ABB TRIO-WIRL ST4000 Specifications

General

Brand	ABB
Model	TRIO-WIRL ST4000
Category	Measuring Instruments
Language	English