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

 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

 303 SS

Nominal Orifice Size

 5

CV

 0.00061

Orifice Geometry

 Round

Maximum Operating Pressure

 4000 psig

Connection A

 1/4" NPT Male

Connection B

 1/4" NPT Male

Screened

 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

 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

 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

 0.0051 in

Width Across Flats (Hex)

 9/16 in

Total Length

 1.38 in

Flow Data

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

 1 psig: 0.136 5 psig: 0.33 10 psig: 0.47 15 psig: 0.59 20 psig: 0.70 25 psig: 0.82 30 psig: 0.92 40 psig: 1.15 50 psig: 1.37 60 psig: 1.59 70 psig: 1.82 80 psig: 2.04 90 psig: 2.27 100 psig: 2.48

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

 5 In. Hg.: 0.203 10 In. Hg.: 0.263

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

 15 In. Hg.: 0.284 20 In. Hg.: 0.284 30 In. Hg.: 0.284

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

 1 psig (6.9 kPag): 0.064 5 psig (34.5 kPag): 0.16 10 psig (69.0 kPag): 0.22 15 psig (103.4 kPag): 0.28 20 psig (137.9 kPag): 0.33 25 psig (172.4 kPag): 0.39 30 psig (206.9 kPag): 0.44 40 psig (275.8 kPag): 0.54 50 psig (344.8 kPag): 0.65 60 psig (413.7 kPag): 0.75 70 psig (482.7 kPag): 0.86 80 psig (551.6 kPag): 0.96 90 psig (620.6 kPag): 1.07 100 psig (689.5 kPag): 1.17

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

 5 In. Hg. (127 Mm. Hg.): 0.096 10 In. Hg. (254 Mm. Hg.): 0.124

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

 15 In. Hg. (381 Mm. Hg.): 0.134 20 In. Hg. (508 Mm. Hg.): 0.134 30 In. Hg. (762 Mm. Hg.): 0.134

Water Flow - Gallons/minute (GPM)

 1 psig: 0.0006 2 psig: 0.0009 3 psig: 0.0011 4 psig: 0.0012 5 psig: 0.0014 6 psig: 0.0015 7 psig: 0.0016 8 psig: 0.0017 9 psig: 0.0018 10 psig: 0.0019 15 psig: 0.0024 20 psig: 0.0027 30 psig: 0.0033 40 psig: 0.0039 50 psig: 0.0043 60 psig: 0.0047 70 psig: 0.0051 80 psig: 0.0055 90 psig: 0.0058 100 psig: 0.0061

Water Flow - Liters/minute (LPM)

 1 psig (6.9 kPag): 0.0023 2 psig (13.8 kPag): 0.0033 3 psig (20.7 kPag): 0.0040 4 psig (27.6 kPag): 0.0046 5 psig (34.5 kPag): 0.0052 6 psig (41.4 kPag): 0.0052 7 psig (48.3 kPag): 0.0061 8 psig (55.2 kPag): 0.0065 9 psig (62.1 kPag): 0.0069 10 psig (69 kPag): 0.0073 15 psig (103.4 kPag): 0.0089 20 psig (137.9 kPag): 0.0103 30 psig (206.9 kPag): 0.0126 40 psig (275.8 kPag): 0.0146 50 psig (344.8 kPag): 0.0163 60 psig (413.7 kPag): 0.0179 70 psig (482.7 kPag): 0.0193 80 psig (551.6 kPag): 0.0207 90 psig (620.6 kPag): 0.0219 100 psig (689.5 kPag): 0.0231

Flow Data Status

 Generic