Page 314 - Praxair - Specialty Gases and Equipment Reference Guide

Flow Devices

Tube Selection for 150 mm Flowmeters

Tube Selection Table for Series 150 Flowmeters
Maximum flow rates shown are at 70 °F and 14.7 PSIA. (Minimum flow rates = 1/10 of maximum flow rate)
Tube Float Air Argon Carbon Dioxide Helium Hydrogen Nitrogen Oxygen Water
Number Material (slpm) (slpm) (slpm) (slpm) (slpm) (slpm) (slpm) (cc/min)
1 Glass .050 .042 .058 .047 .103 .052 .045 0.55
Sapphire .081 .065 .092 .077 .162 .084 .070 1.04
316 SS .150 .123 .160 .149 .323 .156 .135 2.50
Carboloy .263 .214 .268 .273 .606 .265 .235 5.30
Tantalum .300 .256 .280 .341 .726 .306 .281 6.60
2 Glass .089 .077 .110 .091 .195 .095 .082 1.10
Sapphire .144 .116 .168 .143 .311 .145 .127 2.15
316 SS .278 .227 .298 .271 .580 .280 .245 4.90
Carboloy .473 .399 .480 .519 1.11 .485 .442 10.0
Tantalum .560 .466 .514 .632 1.32 .570 .520 12.0
3 Glass .365 .300 .360 .390 .840 .380 .326 4.70
Sapphire .514 .440 .449 .620 1.30 .541 .488 10.0
316 SS .835 .714 .750 1.18 2.35 .860 .800 19.0
Carboloy 1.25 1.05 1.10 2.16 3.84 1.29 1.18 36.0
Tantalum 1.37 1.17 1.19 2.45 4.30 1.40 1.28 41.0
A Glass .850 .709 .755 1.50 2.65 .860 .786 16.0
Sapphire 1.10 .942 .980 2.00 3.54 1.15 1.00 27.0
316 SS 1.70 1.44 1.40 3.50 5.60 1.73 1.58 46.0
Carboloy 2.43 2.00 2.14 5.10 8.10 2.40 2.32 73.0
Tantalum 2.62 2.24 2.27 5.60 8.80 2.60 2.50 81.0
4 Glass 2.34 1.90 2.06 5.00 7.80 2.40 2.33 55.0
Sapphire 3.08 2.63 2.69 6.70 10.3 3.12 2.90 79.0
316 SS 4.64 3.80 4.00 10.3 15.5 4.70 4.36 132
Carboloy 6.60 5.50 5.60 15.0 22.6 6.70 6.20 200
Tantalum 7.00 6.00 6.07 16.0 23.7 7.10 6.60 214
B Glass 3.80 3.20 3.40 8.20 12.8 3.90 3.55 87.0
Sapphire 5.07 4.30 4.40 10.8 16.3 5.10 4.80 126
316 SS 7.58 6.50 6.45 16.9 25.5 7.80 7.20 210 Section E – Gas Handling Equipment
Carboloy 10.8 9.40 9.12 24.5 38.1 11.1 10.6 330
Tantalum 11.5 10.0 9.69 26.4 41.1 12.0 11.2 353
5 Glass 7.70 6.51 6.50 16.5 26.0 7.60 7.00 173
Sapphire 9.64 8.26 8.30 21.8 33.5 10.0 9.19 260
316 SS 14.3 12.2 12.0 31.2 47.0 15.2 13.3 420
Carboloy 20.1 17.2 17.1 47.6 71.3 20.6 19.1 625
Tantalum 22.0 18.5 18.0 51.0 76.2 22.4 20.9 680
6 Glass 23.3 20.0 19.9 55.6 82.4 23.7 22.4 550
Sapphire 30.5 26.0 25.9 78.8 111 31.1 28.9 840
316 SS 45.0 38.0 37.4 109 165 44.9 41.0 1332
Carboloy 61.7 53.4 52.1 157 223 62.0 58.3 1956
Tantalum 65.4 56.4 55.2 167 236 65.5 63.0 2160
Flow capacities for gases not listed may be obtained by contacting your local representative.
* Series 150 flow tubes are supplied standard with both a glass and 316 SS float.
Other float materials are optional. See Optional Equipment below.

Optional Float Materials
Description Part Number
Sapphire Float – Tube Numbers 1,2,3,A,4,B PRS-102-8-SP
Sapphire Float – Tube Numbers 5,6 PRS-102-3-SP
Carboloy Float – Tube Numbers 1,2,3,A,4,B PRS-102-10-CB
Carboloy Float – Tube Numbers 5,6 PRS-102-5-CB
Tantalum Float – Tube Numbers 1,2,3,A,4,B PRS-102-9-TA
Tantalum Float – Tube Numbers 5,6 PRS-102-4-TA

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