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 70

CV

 N/A 0.110

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 0.0700 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: 33.6 5 psig: 71.6 10 psig: 96.6 15 psig: 117 20 psig: 138 25 psig: 158 30 psig: 179 40 psig: 220 50 psig: 261 60 psig: 301 70 psig: 343 80 psig: 384 90 psig: 424 100 psig: 468

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

 N/A 5 In. Hg.: 47.7 10 In. Hg.: 57.6

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

 N/A 15 In. Hg.: 60.2 20 In. Hg.: 60.2 30 In. Hg.: 60.2

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

 N/A 1 psig (6.9 kPag): 15.9 5 psig (34.5 kPag): 33.8 10 psig (69.0 kPag): 45.6 15 psig (103.4 kPag): 55.3 20 psig (137.9 kPag): 65 25 psig (172.4 kPag): 74.7 30 psig (206.9 kPag): 84.3 40 psig (275.8 kPag): 104 50 psig (344.8 kPag): 123 60 psig (413.7 kPag): 142 70 psig (482.7 kPag): 162 80 psig (551.6 kPag): 181 90 psig (620.6 kPag): 200 100 psig (689.5 kPag): 221

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

 N/A 5 In. Hg. (127 Mm. Hg.): 22.5 10 In. Hg. (254 Mm. Hg.): 27.2

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

 N/A 15 In. Hg. (381 Mm. Hg.): 28.4 20 In. Hg. (508 Mm. Hg.): 28.4 30 In. Hg. (762 Mm. Hg.): 28.4

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.110 2 psig: 0.156 3 psig: 0.191 4 psig: 0.220 5 psig: 0.246 6 psig: 0.269 7 psig: 0.291 8 psig: 0.311 9 psig: 0.330 10 psig: 0.348 15 psig: 0.426 20 psig: 0.492 30 psig: 0.602 40 psig: 0.696 50 psig: 0.778 60 psig: 0.852 70 psig: 0.920 80 psig: 0.984 90 psig: 1.044 100 psig: 1.100

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.416 2 psig (13.8 kPag): 0.589 3 psig (20.7 kPag): 0.721 4 psig (27.6 kPag): 0.833 5 psig (34.5 kPag): 0.931 6 psig (41.4 kPag): 1.020 7 psig (48.3 kPag): 1.102 8 psig (55.2 kPag): 1.178 9 psig (62.1 kPag): 1.249 10 psig (69 kPag): 1.317 15 psig (103.4 kPag): 1.613 20 psig (137.9 kPag): 1.862 30 psig (206.9 kPag): 2.281 40 psig (275.8 kPag): 2.634 50 psig (344.8 kPag): 2.944 60 psig (413.7 kPag): 3.225 70 psig (482.7 kPag): 3.484 80 psig (551.6 kPag): 3.724 90 psig (620.6 kPag): 3.95 100 psig (689.5 kPag): 4.164

Flow Data Status

 N/A Generic