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 86

CV

 N/A 0.170

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 0.0860 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: 49.7 5 psig: 108 10 psig: 144 15 psig: 174 20 psig: 203 25 psig: 233 30 psig: 265 40 psig: 324 50 psig: 384 60 psig: 445 70 psig: 509 80 psig: 570 90 psig: 631 100 psig: 697

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

 N/A 5 In. Hg.: 70.3 10 In. Hg.: 87.9

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

 N/A 15 In. Hg.: 91.7 20 In. Hg.: 91.7 30 In. Hg.: 91.7

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

 N/A 1 psig (6.9 kPag): 23.5 5 psig (34.5 kPag): 51.1 10 psig (69.0 kPag): 67.9 15 psig (103.4 kPag): 82.1 20 psig (137.9 kPag): 95.6 25 psig (172.4 kPag): 110 30 psig (206.9 kPag): 125 40 psig (275.8 kPag): 153 50 psig (344.8 kPag): 181 60 psig (413.7 kPag): 210 70 psig (482.7 kPag): 240 80 psig (551.6 kPag): 269 90 psig (620.6 kPag): 298 100 psig (689.5 kPag): 329

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

 N/A 5 In. Hg. (127 Mm. Hg.): 33.2 10 In. Hg. (254 Mm. Hg.): 41.5

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

 N/A 15 In. Hg. (381 Mm. Hg.): 43.3 20 In. Hg. (508 Mm. Hg.): 43.3 30 In. Hg. (762 Mm. Hg.): 43.3

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.170 2 psig: 0.240 3 psig: 0.294 4 psig: 0.340 5 psig: 0.380 6 psig: 0.416 7 psig: 0.450 8 psig: 0.481 9 psig: 0.510 10 psig: 0.538 15 psig: 0.658 20 psig: 0.760 30 psig: 0.931 40 psig: 1.075 50 psig: 1.202 60 psig: 1.317 70 psig: 1.422 80 psig: 1.521 90 psig: 1.613 100 psig: 1.700

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.644 2 psig (13.8 kPag): 0.910 3 psig (20.7 kPag): 1.115 4 psig (27.6 kPag): 1.287 5 psig (34.5 kPag): 1.439 6 psig (41.4 kPag): 1.576 7 psig (48.3 kPag): 1.703 8 psig (55.2 kPag): 1.82 9 psig (62.1 kPag): 1.931 10 psig (69 kPag): 2.035 15 psig (103.4 kPag): 2.492 20 psig (137.9 kPag): 2.878 30 psig (206.9 kPag): 3.525 40 psig (275.8 kPag): 4.070 50 psig (344.8 kPag): 4.550 60 psig (413.7 kPag): 4.985 70 psig (482.7 kPag): 5.384 80 psig (551.6 kPag): 5.756 90 psig (620.6 kPag): 6.105 100 psig (689.5 kPag): 6.435

Flow Data Status

 N/A Generic