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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    Set screw style threaded orifice inserts can be installed in fittings, manifolds or custom parts to establish flow rates of liquids or gases. Standard size orifices range from .004" to .063". Both brass and 316 SS materials are offered.
Unit of Measure

Specifications

Material

 N/A 316 SS

Nominal Orifice Size

 N/A 38

Connection A

 N/A 1/4"-20 UNC Threaded Insert

Screened

 N/A None

Dimensions

Orifice Diameter

 N/A 0.038 in

Thread Size

 N/A 1/4-20

Width Across Flats (Hex)

 N/A 1/8 in

Total Length

 N/A 0.25 in

Flow Data

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

 N/A 1 psig: 8.75 5 psig: 19.3 10 psig: 26.5 15 psig: 32.6 20 psig: 38.4 25 psig: 44.1 30 psig: 50.0 40 psig: 67.2 50 psig: 73.7 60 psig: 86.0 70 psig: 98.1 80 psig: 110 90 psig: 122 100 psig: 135

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

 N/A 5 In. Hg.: 12.3 10 In. Hg.: 15.4

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

 N/A 15 In. Hg.: 16.2 20 In. Hg.: 16.2 30 In. Hg.: 16.2

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

 N/A 1 psig (6.9 kPag): 4.13 5 psig (34.5 kPag): 9.09 10 psig (69.0 kPag): 12.5 15 psig (103.4 kPag): 15.4 20 psig (137.9 kPag): 18.1 25 psig (172.4 kPag): 20.8 30 psig (206.9 kPag): 23.6 40 psig (275.8 kPag): 31.7 50 psig (344.8 kPag): 34.8 60 psig (413.7 kPag): 40.6 70 psig (482.7 kPag): 46.3 80 psig (551.6 kPag): 52.1 90 psig (620.6 kPag): 57.8 100 psig (689.5 kPag): 63.7

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

 N/A 5 In. Hg. (127 Mm. Hg.): 5.81 10 In. Hg. (254 Mm. Hg.): 7.29

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

 N/A 15 In. Hg. (381 Mm. Hg.): 7.63 20 In. Hg. (508 Mm. Hg.): 7.63 30 In. Hg. (762 Mm. Hg.): 7.63

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.032 2 psig: 0.045 3 psig: 0.055 4 psig: 0.064 5 psig: 0.072 6 psig: 0.078 7 psig: 0.085 8 psig: 0.091 9 psig: 0.096 10 psig: 0.101 15 psig: 0.124 20 psig: 0.143 30 psig: 0.175 40 psig: 0.202 50 psig: 0.226 60 psig: 0.248 70 psig: 0.268 80 psig: 0.286 90 psig: 0.304 100 psig: 0.320

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.121 2 psig (13.8 kPag): 0.171 3 psig (20.7 kPag): 0.210 4 psig (27.6 kPag): 0.242 5 psig (34.5 kPag): 0.271 6 psig (41.4 kPag): 0.297 7 psig (48.3 kPag): 0.320 8 psig (55.2 kPag): 0.343 9 psig (62.1 kPag): 0.363 10 psig (69 kPag): 0.383 15 psig (103.4 kPag): 0.469 20 psig (137.9 kPag): 0.542 30 psig (206.9 kPag): 0.663 40 psig (275.8 kPag): 0.766 50 psig (344.8 kPag): 0.857 60 psig (413.7 kPag): 0.938 70 psig (482.7 kPag): 1.013 80 psig (551.6 kPag): 1.083 90 psig (620.6 kPag): 1.149 100 psig (689.5 kPag): 1.211

Flow Data Status

 N/A Generic