Flowmetering Swirl flowmeters 3
Flowrates
Maximum Liquid
Maximum Gases and Steam
m 3 /hr
US GPM
m 3 /hr
ft3/min
15 mm
1/2"
2.5
11
20
12
20 mm
3/4"
4
18
44
26
25 mm
1"
8
35
90
53
32 mm
1 3/4"
16
70
230
135
40 mm
1 1/2"
20
88
300
177
50 mm
2"
30
132
440
259
80 mm
3"
120
528
1160
683
100 mm
4"
180
793
1725
1015
150 mm
6"
400
1760
3800
2237
200 mm
8"
700
3082
5800
3414
3.9 7
300 mm
12"
1600
7045
13600
8005
400 mm
16"
2500
11000
21500
12655
Sizing considerations
Straight run piping requirements*
Inlet Section
Outlet Section
Straight pipe section
minimum 3 × DN
minimum 1 × DN
Valve upstream of the meter
minimum 5 × DN
minimum 1 × DN
Piping conditions
Pipe size reduction
minimum 3 × DN
minimum 1 × DN
Pipe size expansion
minimum 3 × DN
minimum 3 × DN
DN = valve nominal diameter
*Check IM-P799-02 for full installation guidance.
TI-P799-01 EMM Issue 1
Page 7 of 14
SLM30-E Swirl Flow Meter
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