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 6

CV

 N/A 0.00086

Orifice Geometry

 N/A Round

Maximum Operating Pressure

 N/A 2000 psig

Connection A

 N/A 1/4" NPT Male

Connection B

 N/A 1/4" 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 0.0059 in

Width Across Flats (Hex)

 N/A 9/16 in

Total Length

 N/A 1.38 in

Flow Data

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

 N/A 1 psig: 0.182 5 psig: 0.45 10 psig: 0.65 15 psig: 0.82 20 psig: 0.97 25 psig: 1.12 30 psig: 1.26 40 psig: 1.56 50 psig: 1.86 60 psig: 2.16 70 psig: 2.46 80 psig: 2.75 90 psig: 3.05 100 psig: 3.35

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

 N/A 5 In. Hg.: 0.273 10 In. Hg.: 0.356

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

 N/A 15 In. Hg.: 0.392 20 In. Hg.: 0.392 30 In. Hg.: 0.392

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

 N/A 1 psig (6.9 kPag): 0.086 5 psig (34.5 kPag): 0.21 10 psig (69.0 kPag): 0.31 15 psig (103.4 kPag): 0.39 20 psig (137.9 kPag): 0.46 25 psig (172.4 kPag): 0.53 30 psig (206.9 kPag): 0.60 40 psig (275.8 kPag): 0.74 50 psig (344.8 kPag): 0.88 60 psig (413.7 kPag): 1.02 70 psig (482.7 kPag): 1.16 80 psig (551.6 kPag): 1.30 90 psig (620.6 kPag): 1.44 100 psig (689.5 kPag): 1.58

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

 N/A 5 In. Hg. (127 Mm. Hg.): 0.129 10 In. Hg. (254 Mm. Hg.): 0.168

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

 N/A 15 In. Hg. (381 Mm. Hg.): 0.185 20 In. Hg. (508 Mm. Hg.): 0.185 30 In. Hg. (762 Mm. Hg.): 0.185

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.0009 2 psig: 0.0012 3 psig: 0.0015 4 psig: 0.0017 5 psig: 0.0019 6 psig: 0.0021 7 psig: 0.0023 8 psig: 0.0024 9 psig: 0.0026 10 psig: 0.0027 15 psig: 0.0033 20 psig: 0.0038 30 psig: 0.0047 40 psig: 0.0054 50 psig: 0.0061 60 psig: 0.0067 70 psig: 0.0072 80 psig: 0.0077 90 psig: 0.0082 100 psig: 0.0086

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.0033 2 psig (13.8 kPag): 0.0046 3 psig (20.7 kPag): 0.0056 4 psig (27.6 kPag): 0.0065 5 psig (34.5 kPag): 0.0073 6 psig (41.4 kPag): 0.0073 7 psig (48.3 kPag): 0.0086 8 psig (55.2 kPag): 0.0092 9 psig (62.1 kPag): 0.0098 10 psig (69 kPag): 0.0103 15 psig (103.4 kPag): 0.0126 20 psig (137.9 kPag): 0.0146 30 psig (206.9 kPag): 0.0178 40 psig (275.8 kPag): 0.0206 50 psig (344.8 kPag): 0.0230 60 psig (413.7 kPag): 0.0252 70 psig (482.7 kPag): 0.0272 80 psig (551.6 kPag): 0.0291 90 psig (620.6 kPag): 0.0309 100 psig (689.5 kPag): 0.0326

Flow Data Status

 N/A Generic