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Unit of Measure

Flow Direction

 N/A Metal Orifice Assemblies can be used for flow in either direction. The Air Flow and Water Flow data is for a flow direction as shown in the product images.

Material

 N/A 303 SS

Nominal Orifice Size

 N/A 43

CV

 N/A 0.041

Orifice Geometry

 N/A Round

Maximum Operating Pressure

 N/A 4000 psig

Connection A

 N/A 1/4" NPT Male

Connection B

 N/A 1/4" NPT Male

Screened

 N/A None

N/A

  • Precision Flow Control – Gases or Liquids
  • Speed Controls – Cylinders and Actuators
  • Accurate Timing in Pneumatic or Hydraulic Circuits
  • Flow Restriction
  • Accurate Throttling
  • Snubbers - Gages and Instruments
  • Ultrasonic Sound Sources

N/A

  • High Pressure Capability
  • Bi-directional Flow Compatibility
  • Economical Precision Orifice
  • Repeatable Orifice Size and Shape
  • Predictable Flow Rate

Air Flow Notes

 N/A Standard Conditions 70°F, 14.7 psia
SCFH – Standard Cu. Ft. Per Hour
SLPM – Standard Liters Per Minute
The Metal Orifice Air Flow data obtained with Type B restrictor.
Flow rates for other metal restrictors are essentially the same as for Type B.
The Metal Orifice Air Flow data supercedes previous publications.

Water Flow Notes

 N/A The Metal Orifice Water Flow data calculated based on the Cv for each orifice. Flow = Cv √ΔP. ΔP = differential pressure in psid. It is assumed that the region on either side of the orifice is fully flooded with no air pockets.

Orifice Diameter

 N/A 0.043 in

Width Across Flats (Hex)

 N/A 9/16 in

Total Length

 N/A 1.38 in

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

 N/A 1 psig: 11.40 5 psig: 25.6 10 psig: 35.6 15 psig: 43.2 20 psig: 50.9 25 psig: 58.5 30 psig: 66.3 40 psig: 82.0 50 psig: 97.5 60 psig: 113 70 psig: 129 80 psig: 145 90 psig: 161 100 psig: 177

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

 N/A 5 In. Hg.: 16.3 10 In. Hg.: 20.3

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

 N/A 15 In. Hg.: 21.1 20 In. Hg.: 21.1 30 In. Hg.: 21.1

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

 N/A 1 psig (6.9 kPag): 5.36 5 psig (34.5 kPag): 12.1 10 psig (69.0 kPag): 16.8 15 psig (103.4 kPag): 20.4 20 psig (137.9 kPag): 24 25 psig (172.4 kPag): 27.6 30 psig (206.9 kPag): 31.3 40 psig (275.8 kPag): 38.7 50 psig (344.8 kPag): 46 60 psig (413.7 kPag): 53.5 70 psig (482.7 kPag): 61 80 psig (551.6 kPag): 68.5 90 psig (620.6 kPag): 76 100 psig (689.5 kPag): 83.5

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

 N/A 5 In. Hg. (127 Mm. Hg.): 7.67 10 In. Hg. (254 Mm. Hg.): 9.58

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

 N/A 15 In. Hg. (381 Mm. Hg.): 10 20 In. Hg. (508 Mm. Hg.): 10 30 In. Hg. (762 Mm. Hg.): 10

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.041 2 psig: 0.058 3 psig: 0.071 4 psig: 0.082 5 psig: 0.092 6 psig: 0.100 7 psig: 0.108 8 psig: 0.116 9 psig: 0.123 10 psig: 0.130 15 psig: 0.159 20 psig: 0.183 30 psig: 0.225 40 psig: 0.259 50 psig: 0.290 60 psig: 0.318 70 psig: 0.343 80 psig: 0.367 90 psig: 0.389 100 psig: 0.410

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.155 2 psig (13.8 kPag): 0.219 3 psig (20.7 kPag): 0.269 4 psig (27.6 kPag): 0.310 5 psig (34.5 kPag): 0.347 6 psig (41.4 kPag): 0.38 7 psig (48.3 kPag): 0.411 8 psig (55.2 kPag): 0.439 9 psig (62.1 kPag): 0.466 10 psig (69 kPag): 0.491 15 psig (103.4 kPag): 0.601 20 psig (137.9 kPag): 0.694 30 psig (206.9 kPag): 0.850 40 psig (275.8 kPag): 0.982 50 psig (344.8 kPag): 1.097 60 psig (413.7 kPag): 1.202 70 psig (482.7 kPag): 1.299 80 psig (551.6 kPag): 1.388 90 psig (620.6 kPag): 1.472 100 psig (689.5 kPag): 1.552

Flow Data Status

 N/A Generic