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
Print Back
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

 Brass

Nominal Orifice Size

 67

CV

 0.100

Orifice Geometry

 Round

Maximum Operating Pressure

 2000 psig

Connection A

 1/8" NPT Male

Connection B

 1/8" 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

 0.0670 in

Width Across Flats (Hex)

 7/16 in

Total Length

 0.970 in

Flow Data

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

 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)

 5 In. Hg.: 42.4 10 In. Hg.: 51.7

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

 15 In. Hg.: 54.0 20 In. Hg.: 54.0 30 In. Hg.: 54.0

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

 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)

 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)

 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)

 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)

 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

 Generic