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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    This type precision orifice includes an o-ring for sealing against a flat surface. The set screw style can be installed in fittings, manifolds and custom parts for accurate flow rate control of liquids or gases.
Unit of Measure

Specifications

Seal Material

 N/A Viton

Material

 N/A 303 SS

Nominal Orifice Size

 N/A 37

CV

 N/A 0.031

Maximum Temperature

 N/A 300 ºF

Maximum Operating Pressure

 N/A 200 psig

Maximum Opening Diameter

 N/A 0.125 in

Connection A

 N/A 5/16"-18 UNC Threaded Insert O-ring seal

Screened

 N/A None

Dimensions

Orifice Diameter

 N/A 0.037 in

Thread Size

 N/A 5/16-18

Width Across Flats (Hex)

 N/A 5/32 in

Total Length

 N/A 0.640 in

Orifice Diameter Accuracy

 N/A ±0.0005 in

Flow Data

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

 N/A 1 psig: 8.12 5 psig: 18.0 10 psig: 25.0 15 psig: 30.7 20 psig: 36.0 25 psig: 41.5 30 psig: 47.0 40 psig: 58.1 50 psig: 69.1 60 psig: 80.5 70 psig: 91.7 80 psig: 103 90 psig: 115 100 psig: 126

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

 N/A 5 In. Hg.: 11.4 10 In. Hg.: 14.4

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

 N/A 15 In. Hg.: 15.2 20 In. Hg.: 15.2 30 In. Hg.: 15.2

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

 N/A 1 psig (6.9 kPag): 3.83 5 psig (34.5 kPag): 8.48 10 psig (69.0 kPag): 11.8 15 psig (103.4 kPag): 14.5 20 psig (137.9 kPag): 17 25 psig (172.4 kPag): 19.6 30 psig (206.9 kPag): 22.2 40 psig (275.8 kPag): 27.4 50 psig (344.8 kPag): 32.6 60 psig (413.7 kPag): 38 70 psig (482.7 kPag): 43.3 80 psig (551.6 kPag): 48.7 90 psig (620.6 kPag): 54.2 100 psig (689.5 kPag): 59.6

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

 N/A 5 In. Hg. (127 Mm. Hg.): 5.4 10 In. Hg. (254 Mm. Hg.): 6.78

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

 N/A 15 In. Hg. (381 Mm. Hg.): 7.17 20 In. Hg. (508 Mm. Hg.): 7.17 30 In. Hg. (762 Mm. Hg.): 7.17

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.031 2 psig: 0.044 3 psig: 0.054 4 psig: 0.062 5 psig: 0.069 6 psig: 0.076 7 psig: 0.082 8 psig: 0.088 9 psig: 0.093 10 psig: 0.098 15 psig: 0.120 20 psig: 0.139 30 psig: 0.170 40 psig: 0.196 50 psig: 0.219 60 psig: 0.240 70 psig: 0.259 80 psig: 0.277 90 psig: 0.294 100 psig: 0.310

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.117 2 psig (13.8 kPag): 0.166 3 psig (20.7 kPag): 0.203 4 psig (27.6 kPag): 0.235 5 psig (34.5 kPag): 0.262 6 psig (41.4 kPag): 0.287 7 psig (48.3 kPag): 0.310 8 psig (55.2 kPag): 0.332 9 psig (62.1 kPag): 0.352 10 psig (69 kPag): 0.371 15 psig (103.4 kPag): 0.454 20 psig (137.9 kPag): 0.525 30 psig (206.9 kPag): 0.643 40 psig (275.8 kPag): 0.742 50 psig (344.8 kPag): 0.83 60 psig (413.7 kPag): 0.909 70 psig (482.7 kPag): 0.982 80 psig (551.6 kPag): 1.050 90 psig (620.6 kPag): 1.113 100 psig (689.5 kPag): 1.173

Flow Data Status

 N/A Generic