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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 303 SS

Nominal Orifice Size

 N/A 79

CV

 N/A 0.140

Maximum Operating Pressure

 N/A 4000 psig

Connection A

 N/A SAE 37 DEG #4 7/16"-20 Male

Connection B

 N/A SAE 37 DEG #4 7/16"-20 Female

Screened

 N/A None

Orifice Diameter

 N/A 0.0790 in

Orifice Diameter Accuracy

 N/A ±0.0005 in

Width Across Flats (Hex)

 N/A 9/16 in

Total Length

 N/A 1.14 in

Hex Height

 N/A 0.600 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: 43.0 5 psig: 91.3 10 psig: 121 15 psig: 147 20 psig: 172 25 psig: 198 30 psig: 222 40 psig: 273 50 psig: 324 60 psig: 375 70 psig: 428 80 psig: 481 90 psig: 532 100 psig: 587

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

 N/A 5 In. Hg.: 60 10 In. Hg.: 74.8

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

 N/A 15 In. Hg.: 78.0 20 In. Hg.: 78.0 30 In. Hg.: 78.0

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

 N/A 1 psig (6.9 kPag): 20.3 5 psig (34.5 kPag): 43.1 10 psig (69.0 kPag): 57.3 15 psig (103.4 kPag): 69.4 20 psig (137.9 kPag): 81.4 25 psig (172.4 kPag): 93.5 30 psig (206.9 kPag): 105 40 psig (275.8 kPag): 129 50 psig (344.8 kPag): 153 60 psig (413.7 kPag): 177 70 psig (482.7 kPag): 202 80 psig (551.6 kPag): 227 90 psig (620.6 kPag): 251 100 psig (689.5 kPag): 277

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

 N/A 5 In. Hg. (127 Mm. Hg.): 28.3 10 In. Hg. (254 Mm. Hg.): 35.3

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

 N/A 15 In. Hg. (381 Mm. Hg.): 36.8 20 In. Hg. (508 Mm. Hg.): 36.8 30 In. Hg. (762 Mm. Hg.): 36.8

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.140 2 psig: 0.198 3 psig: 0.242 4 psig: 0.280 5 psig: 0.313 6 psig: 0.343 7 psig: 0.370 8 psig: 0.396 9 psig: 0.420 10 psig: 0.443 15 psig: 0.542 20 psig: 0.626 30 psig: 0.767 40 psig: 0.885 50 psig: 0.990 60 psig: 1.084 70 psig: 1.171 80 psig: 1.252 90 psig: 1.328 100 psig: 1.400

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.530 2 psig (13.8 kPag): 0.749 3 psig (20.7 kPag): 0.918 4 psig (27.6 kPag): 1.06 5 psig (34.5 kPag): 1.185 6 psig (41.4 kPag): 1.298 7 psig (48.3 kPag): 1.402 8 psig (55.2 kPag): 1.499 9 psig (62.1 kPag): 1.59 10 psig (69 kPag): 1.676 15 psig (103.4 kPag): 2.053 20 psig (137.9 kPag): 2.370 30 psig (206.9 kPag): 2.903 40 psig (275.8 kPag): 3.352 50 psig (344.8 kPag): 3.747 60 psig (413.7 kPag): 4.105 70 psig (482.7 kPag): 4.434 80 psig (551.6 kPag): 4.74 90 psig (620.6 kPag): 5.028 100 psig (689.5 kPag): 5.3

Flow Data Status

 N/A Generic