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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 55

CV

 N/A 0.068

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 0.055 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: 19.90 5 psig: 43.0 10 psig: 57.4 15 psig: 69.7 20 psig: 82.0 25 psig: 94.5 30 psig: 107 40 psig: 132 50 psig: 157 60 psig: 182 70 psig: 207 80 psig: 231 90 psig: 256 100 psig: 282

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

 N/A 5 In. Hg.: 26.4 10 In. Hg.: 32.7

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

 N/A 15 In. Hg.: 33.7 20 In. Hg.: 33.7 30 In. Hg.: 33.7

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

 N/A 1 psig (6.9 kPag): 9.4 5 psig (34.5 kPag): 20.3 10 psig (69.0 kPag): 27.1 15 psig (103.4 kPag): 32.9 20 psig (137.9 kPag): 38.7 25 psig (172.4 kPag): 44.6 30 psig (206.9 kPag): 50.4 40 psig (275.8 kPag): 62.2 50 psig (344.8 kPag): 74 60 psig (413.7 kPag): 85.8 70 psig (482.7 kPag): 97.6 80 psig (551.6 kPag): 109 90 psig (620.6 kPag): 121 100 psig (689.5 kPag): 133

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

 N/A 5 In. Hg. (127 Mm. Hg.): 12.4 10 In. Hg. (254 Mm. Hg.): 15.4

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

 N/A 15 In. Hg. (381 Mm. Hg.): 15.9 20 In. Hg. (508 Mm. Hg.): 15.9 30 In. Hg. (762 Mm. Hg.): 15.9

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.068 2 psig: 0.096 3 psig: 0.118 4 psig: 0.136 5 psig: 0.152 6 psig: 0.167 7 psig: 0.180 8 psig: 0.192 9 psig: 0.204 10 psig: 0.215 15 psig: 0.263 20 psig: 0.304 30 psig: 0.372 40 psig: 0.430 50 psig: 0.481 60 psig: 0.527 70 psig: 0.569 80 psig: 0.608 90 psig: 0.645 100 psig: 0.680

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.257 2 psig (13.8 kPag): 0.364 3 psig (20.7 kPag): 0.446 4 psig (27.6 kPag): 0.515 5 psig (34.5 kPag): 0.576 6 psig (41.4 kPag): 0.631 7 psig (48.3 kPag): 0.681 8 psig (55.2 kPag): 0.728 9 psig (62.1 kPag): 0.772 10 psig (69 kPag): 0.814 15 psig (103.4 kPag): 0.997 20 psig (137.9 kPag): 1.151 30 psig (206.9 kPag): 1.41 40 psig (275.8 kPag): 1.628 50 psig (344.8 kPag): 1.820 60 psig (413.7 kPag): 1.994 70 psig (482.7 kPag): 2.154 80 psig (551.6 kPag): 2.302 90 psig (620.6 kPag): 2.442 100 psig (689.5 kPag): 2.574

Flow Data Status

 N/A Generic