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

 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

 86

CV

 0.170

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

 0.0860 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: 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)

 5 In. Hg.: 70.3 10 In. Hg.: 87.9

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

 15 In. Hg.: 91.7 20 In. Hg.: 91.7 30 In. Hg.: 91.7

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

 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)

 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)

 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)

 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)

 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

 Generic