Part Number BFS-18-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 18
C_V	N/A 0.0073
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 0.018 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

Type K4 is a 1/4" OD Tube and is suitable for use with a wide variety of compression fittings.Type K2 is for 1/8" OD Tube fittings.Types R4 and RG4 are suitable for use with face seal fittings. Types BFS and CFJ are used in hydraulic circuits, having SAE flare connections.

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: 1.82 5 psig: 4.20 10 psig: 5.38 15 psig: 6.84 20 psig: 8.18 25 psig: 9.43 30 psig: 10.7 40 psig: 13.2 50 psig: 15.7 60 psig: 18.2 70 psig: 20.7 80 psig: 23.3 90 psig: 25.9 100 psig: 28.4
Air Flow at Vacuum - Standard Cu. Ft. Per Hour (SCFH)	N/A 5 In. Hg.: 2.7 10 In. Hg.: 3.35
Air Flow at Vacuum, Choked Flow - Standard Cu. Ft. Per Hour (SCFH)	N/A 15 In. Hg.: 3.71 20 In. Hg.: 3.71 30 In. Hg.: 3.71
Air Flow at Pressure - Standard Liters Per Minute (SLPM)	N/A 1 psig (6.9 kPag): 0.86 5 psig (34.5 kPag): 1.98 10 psig (69.0 kPag): 2.54 15 psig (103.4 kPag): 3.23 20 psig (137.9 kPag): 3.86 25 psig (172.4 kPag): 4.45 30 psig (206.9 kPag): 5.03 40 psig (275.8 kPag): 6.21 50 psig (344.8 kPag): 7.40 60 psig (413.7 kPag): 8.58 70 psig (482.7 kPag): 9.77 80 psig (551.6 kPag): 11.0 90 psig (620.6 kPag): 12.2 100 psig (689.5 kPag): 13.4
Air Flow at Vacuum - Standard Liters Per Minute (SLPM)	N/A 5 In. Hg. (127 Mm. Hg.): 1.28 10 In. Hg. (254 Mm. Hg.): 1.58
Air Flow at Vacuum, Choked Flow - Standard Liters Per Minute (SCFH)	N/A 15 In. Hg. (381 Mm. Hg.): 1.75 20 In. Hg. (508 Mm. Hg.): 1.75 30 In. Hg. (762 Mm. Hg.): 1.75
Water Flow - Gallons/minute (GPM)	N/A 1 psig: 0.0073 2 psig: 0.0103 3 psig: 0.0126 4 psig: 0.0146 5 psig: 0.0163 6 psig: 0.0179 7 psig: 0.0193 8 psig: 0.0206 9 psig: 0.0219 10 psig: 0.0231 15 psig: 0.0283 20 psig: 0.0326 30 psig: 0.0400 40 psig: 0.0462 50 psig: 0.0516 60 psig: 0.0565 70 psig: 0.0611 80 psig: 0.0653 90 psig: 0.0693 100 psig: 0.0730
Water Flow - Liters/minute (LPM)	N/A 1 psig (6.9 kPag): 0.0276 2 psig (13.8 kPag): 0.0391 3 psig (20.7 kPag): 0.0479 4 psig (27.6 kPag): 0.0553 5 psig (34.5 kPag): 0.0618 6 psig (41.4 kPag): 0.0618 7 psig (48.3 kPag): 0.0731 8 psig (55.2 kPag): 0.0782 9 psig (62.1 kPag): 0.0829 10 psig (69 kPag): 0.0874 15 psig (103.4 kPag): 0.1070 20 psig (137.9 kPag): 0.1236 30 psig (206.9 kPag): 0.1514 40 psig (275.8 kPag): 0.1748 50 psig (344.8 kPag): 0.1954 60 psig (413.7 kPag): 0.2140 70 psig (482.7 kPag): 0.2312 80 psig (551.6 kPag): 0.2472 90 psig (620.6 kPag): 0.2622 100 psig (689.5 kPag): 0.2763
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