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    Precision orifice assemblies that adapt to common fittings used in the process industry. Press-fit inserts are used with standard compression tube fittings to form a precision orifice assembly. The fittings shown here are for 1/4" OD tubing, or 3/16" OD tubing.
Unit of Measure

Material

 N/A 316 SS

Nominal Orifice Size

 N/A 31

CV

 N/A 0.022

Maximum Operating Pressure

 N/A 4000 psig

Maximum Pressure Differential

 N/A 200 psid

Connection A

 N/A 1/4" OD Tube Compression

Connection B

 N/A 1/4" OD Tube Compression

Screened

 N/A None

Orifice Diameter

 N/A 0.031 in

Orifice Diameter Accuracy

 N/A ±0.0005 in

Width Across Flats (Hex)

 N/A 9/16 in

Total Length

 N/A 1.61 in

Width Across Flats (Hex) 2

 N/A 1/2 in

N/A

    Compression fittings are used with a metal or rigid plastic tubing. These fittings are used in instrumentation for process control systems. The nature of the connectors allow for easy disassembly and re-assembly without the need for teflon tape or sealants.

N/A

  • High Pressure Capability
  • Bi-directional Flow
  • Economical Precision Orifice
  • Repeatable Orifice Size and Shape
  • Predictable Flow Rate

Air Flow at Pressure - Standard Cu. Ft. Per Hour (SCFH)

 N/A 1 psig: 5.62 5 psig: 12.4 10 psig: 18.3 15 psig: 22.5 20 psig: 26.3 25 psig: 30.1 30 psig: 33.7 40 psig: 41.1 50 psig: 48.5 60 psig: 55.9 70 psig: 63.6 80 psig: 71.2 90 psig: 78.8 100 psig: 86.7

Air Flow at Vacuum - Standard Cu. Ft. Per Hour (SCFH)

 N/A 5 In. Hg.: 8.01 10 In. Hg.: 10.1

Air Flow at Vacuum, Choked Flow - Standard Cu. Ft. Per Hour (SCFH)

 N/A 15 In. Hg.: 10.7 20 In. Hg.: 10.7 30 In. Hg.: 10.7

Air Flow at Pressure - Standard Liters Per Minute (SLPM)

 N/A 1 psig (6.9 kPag): 2.65 5 psig (34.5 kPag): 5.86 10 psig (69.0 kPag): 8.63 15 psig (103.4 kPag): 10.6 20 psig (137.9 kPag): 12.4 25 psig (172.4 kPag): 14.2 30 psig (206.9 kPag): 15.9 40 psig (275.8 kPag): 19.4 50 psig (344.8 kPag): 22.9 60 psig (413.7 kPag): 26.4 70 psig (482.7 kPag): 30.0 80 psig (551.6 kPag): 33.6 90 psig (620.6 kPag): 37.2 100 psig (689.5 kPag): 40.9

Air Flow at Vacuum - Standard Liters Per Minute (SLPM)

 N/A 5 In. Hg. (127 Mm. Hg.): 3.78 10 In. Hg. (254 Mm. Hg.): 4.77

Air Flow at Vacuum, Choked Flow - Standard Liters Per Minute (SCFH)

 N/A 15 In. Hg. (381 Mm. Hg.): 5.05 20 In. Hg. (508 Mm. Hg.): 5.05 30 In. Hg. (762 Mm. Hg.): 5.05

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.022 2 psig: 0.031 3 psig: 0.038 4 psig: 0.044 5 psig: 0.049 6 psig: 0.054 7 psig: 0.058 8 psig: 0.062 9 psig: 0.066 10 psig: 0.070 15 psig: 0.085 20 psig: 0.098 30 psig: 0.120 40 psig: 0.139 50 psig: 0.156 60 psig: 0.170 70 psig: 0.184 80 psig: 0.197 90 psig: 0.209 100 psig: 0.220

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.083 2 psig (13.8 kPag): 0.118 3 psig (20.7 kPag): 0.144 4 psig (27.6 kPag): 0.167 5 psig (34.5 kPag): 0.186 6 psig (41.4 kPag): 0.186 7 psig (48.3 kPag): 0.220 8 psig (55.2 kPag): 0.236 9 psig (62.1 kPag): 0.250 10 psig (69 kPag): 0.263 15 psig (103.4 kPag): 0.323 20 psig (137.9 kPag): 0.372 30 psig (206.9 kPag): 0.456 40 psig (275.8 kPag): 0.527 50 psig (344.8 kPag): 0.589 60 psig (413.7 kPag): 0.645 70 psig (482.7 kPag): 0.697 80 psig (551.6 kPag): 0.745 90 psig (620.6 kPag): 0.790 100 psig (689.5 kPag): 0.833

Flow Data Status

 N/A Generic