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 process instruments and hydraulic systems are shown. Types K4, R4 and RG4 are used with nominal 1/4" tube fittings. Type BFS is for 45° flare fittings and Type CFJ is for 37° flare fittings. Type OD is a pipe adapter.
Unit of Measure

Dimensions

Orifice Diameter

 N/A 0.026 in

Outside Diameter

 N/A 0.47 in

Width

 N/A 0.030 in

Specifications

Material

 N/A 316 SS

Nominal Orifice Size

 N/A 26

CV

 N/A 0.016

Finish

 N/A Silver Plated

Maximum Operating Pressure

 N/A 100 psig

Connection A

 N/A 1/4" Face Seal

Application

N/A

  • Types R4 and RG4 are suitable for use with face seal fittings.

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: 4.05 5 psig: 9.20 10 psig: 13.0 15 psig: 16.1 20 psig: 18.9 25 psig: 21.6 30 psig: 24.4 40 psig: 29.9 50 psig: 35.2 60 psig: 40.7 70 psig: 46.0 80 psig: 51.3 90 psig: 56.8 100 psig: 62.3

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

 N/A 5 In. Hg.: 5.81 10 In. Hg.: 7.29

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

 N/A 15 In. Hg.: 7.73 20 In. Hg.: 7.73 30 In. Hg.: 7.73

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

 N/A 1 psig (6.9 kPag): 1.91 5 psig (34.5 kPag): 4.34 10 psig (69.0 kPag): 6.15 15 psig (103.4 kPag): 7.58 20 psig (137.9 kPag): 8.90 25 psig (172.4 kPag): 10.2 30 psig (206.9 kPag): 11.5 40 psig (275.8 kPag): 14.1 50 psig (344.8 kPag): 16.6 60 psig (413.7 kPag): 19.2 70 psig (482.7 kPag): 21.7 80 psig (551.6 kPag): 24.2 90 psig (620.6 kPag): 26.8 100 psig (689.5 kPag): 29.4

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

 N/A 5 In. Hg. (127 Mm. Hg.): 2.74 10 In. Hg. (254 Mm. Hg.): 3.44

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

 N/A 15 In. Hg. (381 Mm. Hg.): 3.65 20 In. Hg. (508 Mm. Hg.): 3.65 30 In. Hg. (762 Mm. Hg.): 3.65

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.016 2 psig: 0.023 3 psig: 0.028 4 psig: 0.032 5 psig: 0.036 6 psig: 0.039 7 psig: 0.042 8 psig: 0.045 9 psig: 0.048 10 psig: 0.051 15 psig: 0.062 20 psig: 0.072 30 psig: 0.088 40 psig: 0.101 50 psig: 0.113 60 psig: 0.124 70 psig: 0.134 80 psig: 0.143 90 psig: 0.152 100 psig: 0.160

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.061 2 psig (13.8 kPag): 0.086 3 psig (20.7 kPag): 0.105 4 psig (27.6 kPag): 0.121 5 psig (34.5 kPag): 0.135 6 psig (41.4 kPag): 0.135 7 psig (48.3 kPag): 0.160 8 psig (55.2 kPag): 0.171 9 psig (62.1 kPag): 0.182 10 psig (69 kPag): 0.192 15 psig (103.4 kPag): 0.235 20 psig (137.9 kPag): 0.271 30 psig (206.9 kPag): 0.332 40 psig (275.8 kPag): 0.383 50 psig (344.8 kPag): 0.428 60 psig (413.7 kPag): 0.469 70 psig (482.7 kPag): 0.507 80 psig (551.6 kPag): 0.542 90 psig (620.6 kPag): 0.575 100 psig (689.5 kPag): 0.606

Flow Data Status

 N/A Generic