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ACCESSORY FLOWTUBES
For Use with FL-3000 Series variable area flow meter,
Multi-Tube Assemblies and Gas Proportioners
B
The flow tubes shown on this page
can be installed into any of the 150
mm variable area flow meter. Flow
capacities shown are based on
calibrations with air and water at 21°C
(70°F) and 14.7 psia. For other fluids
or conditions, the following equations
provide rough approximations.
Flow tube
shown inside
frame
Gas
Qa = Q
where:
Qa = equivalent air flow scale
reading at Standard Conditions
Qg = true flow of metered gas
G = specific gravity of metered gas
Ta = absolute temperature at flow
conditions, deg R or deg K
To = absolute temperature at
Standard Conditions deg R
(530) or deg K (294)
Pa = pressure at flow conditions,
psia
Po = pressure at Standard
Conditions, (14.7 psia)
Liquid
QW = QL x
where:
Qw = equivalent water flow capacity
at Standard Conditions
QL = maximum flow of metered liquid
df = density of float selected,
(See Table, right), (g/ml)
dL = density of metered liquid, (g/ml)
dw = density of water at Standard
Conditions, (1.0 g/ml)
(Does not include
viscosity effect)
x
g
To P
FL-3845G
G x Ta x P
df-d
W
df-d
L
o
a
d x
L
d
W
150 mm Flowtube, gas flow capacities of routine gases. cc/min, 10:1 range
Model No. Air Water Argon CO2 He H N O
FLT-45G 19 0.196 15 23 16 37 20 17
FLT-45SA 30 0.392 24 37 26 59 31 27
FLT-45ST 60.6 0.94 49 72 53 123 62 54
FLT-45C 110 1.91 90 127 101 232 114 99
FLT-45T 121 2.13 99 139 112 256 125 109
FLT-41G 49 0.49 44 56 46 94 48 42
FLT-41SA 73 0.98 60 84 69 149 76 70.4
FLT-41ST 143 2.34 113 150 133 301 143 131
FLT-41C 247 4.7 202 251 260 567 255 228
FLT-41T 264 5.1 222 263 288 602 274 244
FLT-61G 93 0.9 75.6 103 90 208 92 81
FLT-61C 444 8.5 373 445 519 1120 462 407
FLT-61T 484 9.2 393 470 555 1225 495 433
FLT-02G 374 5.5 305 355 450 1021 382 340
FLT-02SA 513 10.0 429 472 681 1497 520 472
FLT-02ST 814 20.4 676 728 1290 2496 824 753
FLT-02C 1222 33.7 1020 1072 2221 3876 1220 1131
FLT-02T 1331 36.1 1085 1134 2356 4257 1310 1206
FLT-03G 844 16.5 687 725 1490 2620 827 772
FLT-03SA 1093 26.1 910 944 2059 3546 1110 1024
FLT-03ST 1682 44.6 1380 1420 3397 5547 1662 1545
FLT-03C
FLT-03T 2576 75.6 2131 2163 5437 8717 2575 2364
FLT-04G 2313 54 1949 2048 4880 7817 2395 2169
FLT-04SA 3079 78 2605 2620 6458 10455 3142 2860
FLT-04ST 4562 133 3903 3990 9770 15855 4685 4341
FLT-04C 6621 201 5665 5743 14500 22790 6845 6307
FLT-04T 6932 212 6040 6018 15420 24252 7080 6690
FLT-05G 3922 84 3151 3374 7803 13105 3868 3485
FLT-05SA 5188 126 4175 4388 10336 16108 5090 4652
FLT-05ST 7825 217 6384 6308 15960 27804 7722 6992
FLT-05C 11154 329 9460 9222 23509 37553 10973 10082
FLT-05T 11965 353 9627 9475 25131 39998 11628 10741
FLT-39G 8678 210 7366 7485 19426 29840 8916 8269
FLT-39SA 11357 306 9539 9557 25400 40006 11524 10706
FLT-39ST 16737 506 14131 14051 38576 59995 17021 15710
FLT-39C 23752 747 20166 19854 56220 83052 24071 22432
FLT-39T 25252 790 21414 21115 60596 90410 25709 23790
FLT-40G 23742 541 19761 18989 53100 85812 23512 21350
FLT-40SA 30711 806 24563 23855 70100 110100 29930 27181
FLT-40ST 45227 1288 35300 34287 103647 159699 43000 39567
FLT-40C 66346 1881 47890 46311 146500 221872 59580 54902
FLT-40T 69940 2001 51997 49009 189826 234423 63826 57960
Comes complete with correlation sheets for air and water.
Suffix refers to float: G = black glass, SA = red sapphire,
*
ST = 316 stainless steel, C = carboloy, T = tantalum.
Minimum flow is equal to 10% of the maximum listed.
For highest precision, field calibration is required.
2423 70.5 1996 2039 5120 8170 2405 2246
Material Density g/ml
Glass 2.53
Sapphire 3.98
Stainless steel 8.04
Carboloy 14.98
B-34
Tantalum 16.58
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