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 125

CV

 N/A 0.370

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 0.1250 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: 106 5 psig: 229 10 psig: 314 15 psig: 377 20 psig: 445 25 psig: 511 30 psig: 578 40 psig: 714 50 psig: 850 60 psig: 985 70 psig: 1125 80 psig: 1263 90 psig: 1398 100 psig: 1545

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

 N/A 5 In. Hg.: 150 10 In. Hg.: 187

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

 N/A 15 In. Hg.: 195 20 In. Hg.: 195 30 In. Hg.: 195

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

 N/A 1 psig (6.9 kPag): 50.1 5 psig (34.5 kPag): 108 10 psig (69.0 kPag): 148 15 psig (103.4 kPag): 178 20 psig (137.9 kPag): 210 25 psig (172.4 kPag): 241 30 psig (206.9 kPag): 273 40 psig (275.8 kPag): 337 50 psig (344.8 kPag): 401 60 psig (413.7 kPag): 465 70 psig (482.7 kPag): 531 80 psig (551.6 kPag): 596 90 psig (620.6 kPag): 660 100 psig (689.5 kPag): 729

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

 N/A 5 In. Hg. (127 Mm. Hg.): 70.9 10 In. Hg. (254 Mm. Hg.): 88.4

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

 N/A 15 In. Hg. (381 Mm. Hg.): 92.2 20 In. Hg. (508 Mm. Hg.): 92.2 30 In. Hg. (762 Mm. Hg.): 92.2

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.370 2 psig: 0.523 3 psig: 0.641 4 psig: 0.740 5 psig: 0.827 6 psig: 0.906 7 psig: 0.979 8 psig: 1.047 9 psig: 1.110 10 psig: 1.170 15 psig: 1.433 20 psig: 1.655 30 psig: 2.027 40 psig: 2.340 50 psig: 2.616 60 psig: 2.866 70 psig: 3.096 80 psig: 3.309 90 psig: 3.510 100 psig: 3.700

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 1.401 2 psig (13.8 kPag): 1.981 3 psig (20.7 kPag): 2.426 4 psig (27.6 kPag): 2.801 5 psig (34.5 kPag): 3.132 6 psig (41.4 kPag): 3.431 7 psig (48.3 kPag): 3.706 8 psig (55.2 kPag): 3.961 9 psig (62.1 kPag): 4.202 10 psig (69 kPag): 4.429 15 psig (103.4 kPag): 5.424 20 psig (137.9 kPag): 6.264 30 psig (206.9 kPag): 7.671 40 psig (275.8 kPag): 8.858 50 psig (344.8 kPag): 9.904 60 psig (413.7 kPag): 10.849 70 psig (482.7 kPag): 11.718 80 psig (551.6 kPag): 12.527 90 psig (620.6 kPag): 13.287 100 psig (689.5 kPag): 14.006

Flow Data Status

 N/A Generic