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12
Meter Size
To select the meter size:
See Figure 13 and find
meter sizes within the
velocity of 0.1 to 10m/s for a specified full-scale
(measuring range high limit) flow. Select one that
has its full-scale velocity between 1 and 3m/s.
Note: Make sure the full-scale flow rate used for the
final planning stage stays within 10m/s in terms
of flow velocity.
Flow rate
(m
3
/h
)
Flow
velocity
(m/s)
For SI unit Unit: m
3
/h
Flow rate
Meter size
(mm)
0.3 m/s 1 m/s 10 m/s
15 0.1908 0.6361 6.361
25 0.5301 1.767 17.67
40 1.357 4.523 45.23
50 2.120 7.067 70.67
80 5.428 18.09 180.9
100 8.482 28.27 282.7
150 19.08 63.61 636.1
200 33.93 113.1 1131
For English unit Unit: gal/min
Flow rate
Meter size
(inch)
0.98ft/s 3.28ft/s 32.8ft/s
1/2 0.8401 2.801 28.01
1
2.334 7.780 77.80
1 1/2 5.975 19.91 199.1
2 9.334 31.12 311.2
3 23.90 79.65 796.5
4 37.35 124.5 1,245
6 84.01 280.1 2,801
8 149.4 498.0 4,980
Figure 13. Flow Rate and Flow Velocity
Calibration Range
If the calibration range is not specified, the standard
range as shown below will be used. If the range is
specified, we will use the specified range for
calibration.
Table 1. Standard Flow Range
Standard flow range
Meter size
mm (inch)
Flow rate
(m³/h)
Flow velocity
(m/s)
Flow rate
(gal/min)
15 (1/2) 2 3.144 25
25 (1) 6 3.395 75
40 (1 1/2) 15 3.316 175
50 (2) 25 3.537 300
80 (3) 60 3.316 650
100 (4) 100 3.537 1,000
150 (6) 200 3.144 2,500
200 (8) 300 2.653 4,500
Note: The unit of "gal/min" is not exchanged
(converted) by "m
3
/h".
PED matrix in each flange connection.
The following sizes fall under the category for PED
in each flange connection when the meter ships to
EU. All of them had complied with it from a notified
body.
Table 2 PED matrix in each flange connection
Flange standard Meter size
DIN PN 16 and BS 16
150 to 400mm
(6 to 16 inch)
DIN PN 10 and BS 10
250 to 400mm
(10 to 16 inch)
ANSI 150 and JIS10K
6 to 16 inch
(150 to 400mm)