O’Keefe Controls Co.
O’Keefe Controls Co.
4 Maple Drive
Monroe, CT 06468
Phone: 203.261.6711
Email: info@okeefecontrols.com • Website: www.okeefecontrols.com
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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

Specifications

Material

 N/A 316 SS

Nominal Orifice Size

 N/A 55

CV

 N/A 0.068

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

Dimensions

Orifice Diameter

 N/A 0.055 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

Application

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.

Advantages

N/A

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

Flow Data

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

 N/A 1 psig: 19.90 5 psig: 43.0 10 psig: 57.4 15 psig: 69.7 20 psig: 82.0 25 psig: 94.5 30 psig: 107 40 psig: 132 50 psig: 157 60 psig: 182 70 psig: 207 80 psig: 231 90 psig: 256 100 psig: 282

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

 N/A 5 In. Hg.: 26.4 10 In. Hg.: 32.7

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

 N/A 15 In. Hg.: 33.7 20 In. Hg.: 33.7 30 In. Hg.: 33.7

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

 N/A 1 psig (6.9 kPag): 9.4 5 psig (34.5 kPag): 20.3 10 psig (69.0 kPag): 27.1 15 psig (103.4 kPag): 32.9 20 psig (137.9 kPag): 38.7 25 psig (172.4 kPag): 44.6 30 psig (206.9 kPag): 50.4 40 psig (275.8 kPag): 62.2 50 psig (344.8 kPag): 74 60 psig (413.7 kPag): 85.8 70 psig (482.7 kPag): 97.6 80 psig (551.6 kPag): 109 90 psig (620.6 kPag): 121 100 psig (689.5 kPag): 133

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

 N/A 5 In. Hg. (127 Mm. Hg.): 12.4 10 In. Hg. (254 Mm. Hg.): 15.4

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

 N/A 15 In. Hg. (381 Mm. Hg.): 15.9 20 In. Hg. (508 Mm. Hg.): 15.9 30 In. Hg. (762 Mm. Hg.): 15.9

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.068 2 psig: 0.096 3 psig: 0.118 4 psig: 0.136 5 psig: 0.152 6 psig: 0.167 7 psig: 0.180 8 psig: 0.192 9 psig: 0.204 10 psig: 0.215 15 psig: 0.263 20 psig: 0.304 30 psig: 0.372 40 psig: 0.430 50 psig: 0.481 60 psig: 0.527 70 psig: 0.569 80 psig: 0.608 90 psig: 0.645 100 psig: 0.680

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.257 2 psig (13.8 kPag): 0.364 3 psig (20.7 kPag): 0.446 4 psig (27.6 kPag): 0.515 5 psig (34.5 kPag): 0.576 6 psig (41.4 kPag): 0.631 7 psig (48.3 kPag): 0.681 8 psig (55.2 kPag): 0.728 9 psig (62.1 kPag): 0.772 10 psig (69 kPag): 0.814 15 psig (103.4 kPag): 0.997 20 psig (137.9 kPag): 1.151 30 psig (206.9 kPag): 1.41 40 psig (275.8 kPag): 1.628 50 psig (344.8 kPag): 1.820 60 psig (413.7 kPag): 1.994 70 psig (482.7 kPag): 2.154 80 psig (551.6 kPag): 2.302 90 psig (620.6 kPag): 2.442 100 psig (689.5 kPag): 2.574

Flow Data Status

 N/A Generic