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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 7

CV

 N/A 0.0012

Maximum Operating Pressure

 N/A 4000 psig

Maximum Pressure Differential

 N/A 200 psid

Connection A

 N/A 1/4" NPT Male

Connection B

 N/A 1/4" OD Tube Compression

Screened

 N/A None

Orifice Diameter

 N/A 0.0071 in

Orifice Diameter Accuracy

 N/A ±0.0005 in

Width Across Flats (Hex)

 N/A 9/16 in

Total Length

 N/A 1.48 in

Width Across Flats (Hex) 2

 N/A 9/16 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: 0.269 5 psig: 0.64 10 psig: 0.91 15 psig: 1.14 20 psig: 1.38 25 psig: 1.59 30 psig: 1.80 40 psig: 2.22 50 psig: 2.67 60 psig: 3.09 70 psig: 3.54 80 psig: 3.96 90 psig: 4.41 100 psig: 4.83

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

 N/A 5 In. Hg.: 0.405 10 In. Hg.: 0.521

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

 N/A 15 In. Hg.: 0.568 20 In. Hg.: 0.568 30 In. Hg.: 0.568

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

 N/A 1 psig (6.9 kPag): 0.127 5 psig (34.5 kPag): 0.30 10 psig (69.0 kPag): 0.43 15 psig (103.4 kPag): 0.54 20 psig (137.9 kPag): 0.65 25 psig (172.4 kPag): 0.75 30 psig (206.9 kPag): 0.85 40 psig (275.8 kPag): 1.05 50 psig (344.8 kPag): 1.26 60 psig (413.7 kPag): 1.46 70 psig (482.7 kPag): 1.67 80 psig (551.6 kPag): 1.87 90 psig (620.6 kPag): 2.08 100 psig (689.5 kPag): 2.28

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

 N/A 5 In. Hg. (127 Mm. Hg.): 0.191 10 In. Hg. (254 Mm. Hg.): 0.246

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

 N/A 15 In. Hg. (381 Mm. Hg.): 0.268 20 In. Hg. (508 Mm. Hg.): 0.268 30 In. Hg. (762 Mm. Hg.): 0.268

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.0012 2 psig: 0.0017 3 psig: 0.0021 4 psig: 0.0024 5 psig: 0.0027 6 psig: 0.0029 7 psig: 0.0032 8 psig: 0.0034 9 psig: 0.0036 10 psig: 0.0038 15 psig: 0.0046 20 psig: 0.0054 30 psig: 0.0066 40 psig: 0.0076 50 psig: 0.0085 60 psig: 0.0093 70 psig: 0.0100 80 psig: 0.0107 90 psig: 0.0114 100 psig: 0.0120

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.0045 2 psig (13.8 kPag): 0.0064 3 psig (20.7 kPag): 0.0079 4 psig (27.6 kPag): 0.0091 5 psig (34.5 kPag): 0.0102 6 psig (41.4 kPag): 0.0102 7 psig (48.3 kPag): 0.0120 8 psig (55.2 kPag): 0.0128 9 psig (62.1 kPag): 0.0136 10 psig (69 kPag): 0.0144 15 psig (103.4 kPag): 0.0176 20 psig (137.9 kPag): 0.0203 30 psig (206.9 kPag): 0.0249 40 psig (275.8 kPag): 0.0287 50 psig (344.8 kPag): 0.0321 60 psig (413.7 kPag): 0.0352 70 psig (482.7 kPag): 0.0380 80 psig (551.6 kPag): 0.0406 90 psig (620.6 kPag): 0.0431 100 psig (689.5 kPag): 0.0454

Flow Data Status

 N/A Generic