Part Number BFSS-4-BR, Precision Metal Orifices - SAE 45 Degree Flare Adapter On O'Keefe Controls Co.

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Precision orifice assemblies that adapt to common fittings used in process instruments and hydraulic systems are shown.

Unit of Measure

Material	N/A Brass
Nominal Orifice Size	N/A 4
C_V	N/A 0.00035
Maximum Operating Pressure	N/A 2000 psig
Taper	N/A 45 º
Connection A	N/A 1/8" NPT Male
Connection B	N/A SAE 45 DEG #4 7/16"-20 Male
Screened	N/A Screened

Orifice Diameter	N/A 0.0039 in
Orifice Diameter Accuracy	N/A ±0.0005 in
Width Across Flats (Hex)	N/A 7/16 in
Total Length	N/A 1.04 in

N/A

The integral screen/orifice assembly provides a compact arrangement. All types on this page The screen is located upstream of the orifice and protects against particles carried by the pressurized fluid. For protection against contamination in reverse flow situations add an external screen downstream of the orifice.

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: 0.075 5 psig: 0.18 10 psig: 0.25 15 psig: 0.30 20 psig: 0.40 25 psig: 0.47 30 psig: 0.53 40 psig: 0.64 50 psig: 0.76 60 psig: 0.89 70 psig: 1.02 80 psig: 1.14 90 psig: 1.27 100 psig: 1.40
Air Flow at Vacuum - Standard Cu. Ft. Per Hour (SCFH)	N/A 5 In. Hg.: 0.113 10 In. Hg.: 0.145
Air Flow at Vacuum, Choked Flow - Standard Cu. Ft. Per Hour (SCFH)	N/A 15 In. Hg.: 0.158 20 In. Hg.: 0.158 30 In. Hg.: 0.158
Air Flow at Pressure - Standard Liters Per Minute (SLPM)	N/A 1 psig (6.9 kPag): 0.035 5 psig (34.5 kPag): 0.09 10 psig (69.0 kPag): 0.12 15 psig (103.4 kPag): 0.16 20 psig (137.9 kPag): 0.19 25 psig (172.4 kPag): 0.22 30 psig (206.9 kPag): 0.25 40 psig (275.8 kPag): 0.30 50 psig (344.8 kPag): 0.36 60 psig (413.7 kPag): 0.42 70 psig (482.7 kPag): 0.48 80 psig (551.6 kPag): 0.54 90 psig (620.6 kPag): 0.60 100 psig (689.5 kPag): 0.66
Air Flow at Vacuum - Standard Liters Per Minute (SLPM)	N/A 5 In. Hg. (127 Mm. Hg.): 0.053 10 In. Hg. (254 Mm. Hg.): 0.069
Air Flow at Vacuum, Choked Flow - Standard Liters Per Minute (SCFH)	N/A 15 In. Hg. (381 Mm. Hg.): 0.075 20 In. Hg. (508 Mm. Hg.): 0.075 30 In. Hg. (762 Mm. Hg.): 0.075
Water Flow - Gallons/minute (GPM)	N/A 1 psig: 0.00035 2 psig: 0.00049 3 psig: 0.00061 4 psig: 0.00070 5 psig: 0.00078 6 psig: 0.00086 7 psig: 0.00093 8 psig: 0.00099 9 psig: 0.00105 10 psig: 0.00111 15 psig: 0.00136 20 psig: 0.00157 30 psig: 0.00192 40 psig: 0.00221 50 psig: 0.00247 60 psig: 0.00271 70 psig: 0.00293 80 psig: 0.00313 90 psig: 0.00332 100 psig: 0.00350
Water Flow - Liters/minute (LPM)	N/A 1 psig (6.9 kPag): 0.0013 2 psig (13.8 kPag): 0.0019 3 psig (20.7 kPag): 0.0023 4 psig (27.6 kPag): 0.0026 5 psig (34.5 kPag): 0.0030 6 psig (41.4 kPag): 0.0030 7 psig (48.3 kPag): 0.0035 8 psig (55.2 kPag): 0.0037 9 psig (62.1 kPag): 0.0040 10 psig (69 kPag): 0.0042 15 psig (103.4 kPag): 0.0051 20 psig (137.9 kPag): 0.0059 30 psig (206.9 kPag): 0.0073 40 psig (275.8 kPag): 0.0084 50 psig (344.8 kPag): 0.0094 60 psig (413.7 kPag): 0.0103 70 psig (482.7 kPag): 0.0111 80 psig (551.6 kPag): 0.0119 90 psig (620.6 kPag): 0.0126 100 psig (689.5 kPag): 0.0132
Flow Data Status	N/A Generic

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Material

Nominal Orifice Size

CV

Maximum Operating Pressure

Taper

Connection A

Connection B

Screened

C_V