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 39

CV

 N/A 0.033

Orifice Geometry

 N/A Round

Maximum Operating Pressure

 N/A 4000 psig

Connection A

 N/A 1/8" NPT Male

Connection B

 N/A 1/8" 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 0.039 in

Width Across Flats (Hex)

 N/A 7/16 in

Total Length

 N/A 0.970 in

Flow Data

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

 N/A 1 psig: 9.45 5 psig: 20.6 10 psig: 28.8 15 psig: 35.4 20 psig: 41.5 25 psig: 47.9 30 psig: 54.2 40 psig: 67.0 50 psig: 79.7 60 psig: 92.8 70 psig: 106 80 psig: 119 90 psig: 132 100 psig: 146

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

 N/A 5 In. Hg.: 13.3 10 In. Hg.: 16.6

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

 N/A 15 In. Hg.: 17.4 20 In. Hg.: 17.4 30 In. Hg.: 17.4

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

 N/A 1 psig (6.9 kPag): 4.46 5 psig (34.5 kPag): 9.7 10 psig (69.0 kPag): 13.6 15 psig (103.4 kPag): 16.7 20 psig (137.9 kPag): 19.6 25 psig (172.4 kPag): 22.6 30 psig (206.9 kPag): 25.6 40 psig (275.8 kPag): 31.6 50 psig (344.8 kPag): 37.6 60 psig (413.7 kPag): 43.8 70 psig (482.7 kPag): 50 80 psig (551.6 kPag): 56.2 90 psig (620.6 kPag): 62.4 100 psig (689.5 kPag): 68.7

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

 N/A 5 In. Hg. (127 Mm. Hg.): 6.29 10 In. Hg. (254 Mm. Hg.): 7.85

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

 N/A 15 In. Hg. (381 Mm. Hg.): 8.22 20 In. Hg. (508 Mm. Hg.): 8.22 30 In. Hg. (762 Mm. Hg.): 8.22

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.033 2 psig: 0.047 3 psig: 0.057 4 psig: 0.066 5 psig: 0.074 6 psig: 0.081 7 psig: 0.087 8 psig: 0.093 9 psig: 0.099 10 psig: 0.104 15 psig: 0.128 20 psig: 0.148 30 psig: 0.181 40 psig: 0.209 50 psig: 0.233 60 psig: 0.256 70 psig: 0.276 80 psig: 0.295 90 psig: 0.313 100 psig: 0.330

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.125 2 psig (13.8 kPag): 0.177 3 psig (20.7 kPag): 0.216 4 psig (27.6 kPag): 0.250 5 psig (34.5 kPag): 0.279 6 psig (41.4 kPag): 0.306 7 psig (48.3 kPag): 0.331 8 psig (55.2 kPag): 0.353 9 psig (62.1 kPag): 0.375 10 psig (69 kPag): 0.395 15 psig (103.4 kPag): 0.484 20 psig (137.9 kPag): 0.559 30 psig (206.9 kPag): 0.684 40 psig (275.8 kPag): 0.79 50 psig (344.8 kPag): 0.883 60 psig (413.7 kPag): 0.968 70 psig (482.7 kPag): 1.045 80 psig (551.6 kPag): 1.117 90 psig (620.6 kPag): 1.185 100 psig (689.5 kPag): 1.249

Flow Data Status

 N/A Generic