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 Brass

Nominal Orifice Size

 N/A 67

CV

 N/A 0.100

Orifice Geometry

 N/A Round

Maximum Operating Pressure

 N/A 2000 psig

Connection A

 N/A 3/8" NPT Male

Connection B

 N/A 3/8" 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 0.0670 in

Width Across Flats (Hex)

 N/A 11/16 in

Total Length

 N/A 1.47 in

Flow Data

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

 N/A 1 psig: 30.1 5 psig: 64.2 10 psig: 86.2 15 psig: 104 20 psig: 123 25 psig: 141 30 psig: 160 40 psig: 196 50 psig: 233 60 psig: 269 70 psig: 307 80 psig: 343 90 psig: 379 100 psig: 415

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

 N/A 5 In. Hg.: 42.4 10 In. Hg.: 51.7

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

 N/A 15 In. Hg.: 54.0 20 In. Hg.: 54.0 30 In. Hg.: 54.0

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

 N/A 1 psig (6.9 kPag): 14.2 5 psig (34.5 kPag): 30.3 10 psig (69.0 kPag): 40.7 15 psig (103.4 kPag): 49.3 20 psig (137.9 kPag): 58 25 psig (172.4 kPag): 66.7 30 psig (206.9 kPag): 75.4 40 psig (275.8 kPag): 92.7 50 psig (344.8 kPag): 110 60 psig (413.7 kPag): 127 70 psig (482.7 kPag): 145 80 psig (551.6 kPag): 162 90 psig (620.6 kPag): 179 100 psig (689.5 kPag): 196

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

 N/A 5 In. Hg. (127 Mm. Hg.): 20 10 In. Hg. (254 Mm. Hg.): 24.4

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

 N/A 15 In. Hg. (381 Mm. Hg.): 25.5 20 In. Hg. (508 Mm. Hg.): 25.5 30 In. Hg. (762 Mm. Hg.): 25.5

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.100 2 psig: 0.141 3 psig: 0.173 4 psig: 0.200 5 psig: 0.224 6 psig: 0.245 7 psig: 0.265 8 psig: 0.283 9 psig: 0.300 10 psig: 0.316 15 psig: 0.387 20 psig: 0.447 30 psig: 0.548 40 psig: 0.632 50 psig: 0.707 60 psig: 0.775 70 psig: 0.837 80 psig: 0.894 90 psig: 0.949 100 psig: 1.000

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.379 2 psig (13.8 kPag): 0.535 3 psig (20.7 kPag): 0.656 4 psig (27.6 kPag): 0.757 5 psig (34.5 kPag): 0.846 6 psig (41.4 kPag): 0.927 7 psig (48.3 kPag): 1.002 8 psig (55.2 kPag): 1.071 9 psig (62.1 kPag): 1.136 10 psig (69 kPag): 1.197 15 psig (103.4 kPag): 1.466 20 psig (137.9 kPag): 1.693 30 psig (206.9 kPag): 2.073 40 psig (275.8 kPag): 2.394 50 psig (344.8 kPag): 2.677 60 psig (413.7 kPag): 2.932 70 psig (482.7 kPag): 3.167 80 psig (551.6 kPag): 3.386 90 psig (620.6 kPag): 3.591 100 psig (689.5 kPag): 3.785

Flow Data Status

 N/A Generic