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 23

CV

 N/A 0.012

Orifice Geometry

 N/A Round

Maximum Operating Pressure

 N/A 4000 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 0.023 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: 2.99 5 psig: 6.87 10 psig: 10.1 15 psig: 12.6 20 psig: 14.7 25 psig: 16.8 30 psig: 19.0 40 psig: 23.3 50 psig: 27.5 60 psig: 31.8 70 psig: 36.0 80 psig: 40.3 90 psig: 44.5 100 psig: 48.7

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

 N/A 5 In. Hg.: 4.45 10 In. Hg.: 5.68

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

 N/A 15 In. Hg.: 6.04 20 In. Hg.: 6.04 30 In. Hg.: 6.04

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

 N/A 1 psig (6.9 kPag): 1.41 5 psig (34.5 kPag): 3.24 10 psig (69.0 kPag): 4.75 15 psig (103.4 kPag): 5.93 20 psig (137.9 kPag): 6.95 25 psig (172.4 kPag): 7.95 30 psig (206.9 kPag): 8.98 40 psig (275.8 kPag): 11.0 50 psig (344.8 kPag): 13.0 60 psig (413.7 kPag): 15.0 70 psig (482.7 kPag): 17.0 80 psig (551.6 kPag): 19.0 90 psig (620.6 kPag): 21.0 100 psig (689.5 kPag): 23.0

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

 N/A 5 In. Hg. (127 Mm. Hg.): 2.10 10 In. Hg. (254 Mm. Hg.): 2.68

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

 N/A 15 In. Hg. (381 Mm. Hg.): 2.85 20 In. Hg. (508 Mm. Hg.): 2.85 30 In. Hg. (762 Mm. Hg.): 2.85

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.012 2 psig: 0.017 3 psig: 0.021 4 psig: 0.024 5 psig: 0.027 6 psig: 0.029 7 psig: 0.032 8 psig: 0.034 9 psig: 0.036 10 psig: 0.038 15 psig: 0.046 20 psig: 0.054 30 psig: 0.066 40 psig: 0.076 50 psig: 0.085 60 psig: 0.093 70 psig: 0.100 80 psig: 0.107 90 psig: 0.114 100 psig: 0.120

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.045 2 psig (13.8 kPag): 0.064 3 psig (20.7 kPag): 0.079 4 psig (27.6 kPag): 0.091 5 psig (34.5 kPag): 0.102 6 psig (41.4 kPag): 0.102 7 psig (48.3 kPag): 0.120 8 psig (55.2 kPag): 0.128 9 psig (62.1 kPag): 0.136 10 psig (69 kPag): 0.144 15 psig (103.4 kPag): 0.176 20 psig (137.9 kPag): 0.203 30 psig (206.9 kPag): 0.249 40 psig (275.8 kPag): 0.287 50 psig (344.8 kPag): 0.321 60 psig (413.7 kPag): 0.352 70 psig (482.7 kPag): 0.380 80 psig (551.6 kPag): 0.406 90 psig (620.6 kPag): 0.431 100 psig (689.5 kPag): 0.454

Flow Data Status

 N/A Generic