O’Keefe Controls Co.
O’Keefe Controls Co.
4 Maple Drive
Monroe, CT 06468
Phone: 203.261.6711
Email: info@okeefecontrols.com • Website: www.okeefecontrols.com
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Unit of Measure

Specifications

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 47

CV

 N/A 0.048

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

Application

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

Advantages

N/A

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

Air Flow Notes

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

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.

Dimensions

Orifice Diameter

 N/A 0.047 in

Width Across Flats (Hex)

 N/A 9/16 in

Total Length

 N/A 1.38 in

Flow Data

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

 N/A 1 psig: 13.60 5 psig: 30.1 10 psig: 41.0 15 psig: 50.0 20 psig: 58.7 25 psig: 67.6 30 psig: 76.3 40 psig: 94.3 50 psig: 112 60 psig: 130 70 psig: 148 80 psig: 167 90 psig: 185 100 psig: 203

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

 N/A 5 In. Hg.: 19.2 10 In. Hg.: 23.6

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

 N/A 15 In. Hg.: 24.5 20 In. Hg.: 24.5 30 In. Hg.: 24.5

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

 N/A 1 psig (6.9 kPag): 6.43 5 psig (34.5 kPag): 14.2 10 psig (69.0 kPag): 19.4 15 psig (103.4 kPag): 23.6 20 psig (137.9 kPag): 27.7 25 psig (172.4 kPag): 31.9 30 psig (206.9 kPag): 36 40 psig (275.8 kPag): 44.5 50 psig (344.8 kPag): 52.9 60 psig (413.7 kPag): 61.5 70 psig (482.7 kPag): 70 80 psig (551.6 kPag): 78.6 90 psig (620.6 kPag): 87.2 100 psig (689.5 kPag): 95.8

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

 N/A 5 In. Hg. (127 Mm. Hg.): 9.08 10 In. Hg. (254 Mm. Hg.): 11.1

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

 N/A 15 In. Hg. (381 Mm. Hg.): 11.6 20 In. Hg. (508 Mm. Hg.): 11.6 30 In. Hg. (762 Mm. Hg.): 11.6

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.048 2 psig: 0.068 3 psig: 0.083 4 psig: 0.096 5 psig: 0.107 6 psig: 0.118 7 psig: 0.127 8 psig: 0.136 9 psig: 0.144 10 psig: 0.152 15 psig: 0.186 20 psig: 0.215 30 psig: 0.263 40 psig: 0.304 50 psig: 0.339 60 psig: 0.372 70 psig: 0.402 80 psig: 0.429 90 psig: 0.455 100 psig: 0.480

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.182 2 psig (13.8 kPag): 0.257 3 psig (20.7 kPag): 0.315 4 psig (27.6 kPag): 0.363 5 psig (34.5 kPag): 0.406 6 psig (41.4 kPag): 0.445 7 psig (48.3 kPag): 0.481 8 psig (55.2 kPag): 0.514 9 psig (62.1 kPag): 0.545 10 psig (69 kPag): 0.575 15 psig (103.4 kPag): 0.704 20 psig (137.9 kPag): 0.813 30 psig (206.9 kPag): 0.995 40 psig (275.8 kPag): 1.149 50 psig (344.8 kPag): 1.285 60 psig (413.7 kPag): 1.407 70 psig (482.7 kPag): 1.520 80 psig (551.6 kPag): 1.625 90 psig (620.6 kPag): 1.724 100 psig (689.5 kPag): 1.817

Flow Data Status

 N/A Generic