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 104

CV

 N/A 0.250

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 0.1040 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: 75.2 5 psig: 162 10 psig: 216 15 psig: 261 20 psig: 305 25 psig: 347 30 psig: 392 40 psig: 483 50 psig: 576 60 psig: 667 70 psig: 763 80 psig: 856 90 psig: 947 100 psig: 1047

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

 N/A 5 In. Hg.: 104 10 In. Hg.: 130

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

 N/A 15 In. Hg.: 135 20 In. Hg.: 135 30 In. Hg.: 135

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

 N/A 1 psig (6.9 kPag): 35.5 5 psig (34.5 kPag): 76.6 10 psig (69.0 kPag): 102 15 psig (103.4 kPag): 123 20 psig (137.9 kPag): 144 25 psig (172.4 kPag): 164 30 psig (206.9 kPag): 185 40 psig (275.8 kPag): 228 50 psig (344.8 kPag): 272 60 psig (413.7 kPag): 315 70 psig (482.7 kPag): 360 80 psig (551.6 kPag): 404 90 psig (620.6 kPag): 447 100 psig (689.5 kPag): 494

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

 N/A 5 In. Hg. (127 Mm. Hg.): 49 10 In. Hg. (254 Mm. Hg.): 61.2

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

 N/A 15 In. Hg. (381 Mm. Hg.): 63.8 20 In. Hg. (508 Mm. Hg.): 63.8 30 In. Hg. (762 Mm. Hg.): 63.8

Water Flow - Gallons/minute (GPM)

 N/A 1 psig: 0.250 2 psig: 0.354 3 psig: 0.433 4 psig: 0.500 5 psig: 0.559 6 psig: 0.612 7 psig: 0.661 8 psig: 0.707 9 psig: 0.750 10 psig: 0.791 15 psig: 0.968 20 psig: 1.118 30 psig: 1.369 40 psig: 1.581 50 psig: 1.768 60 psig: 1.936 70 psig: 2.092 80 psig: 2.236 90 psig: 2.372 100 psig: 2.500

Water Flow - Liters/minute (LPM)

 N/A 1 psig (6.9 kPag): 0.946 2 psig (13.8 kPag): 1.338 3 psig (20.7 kPag): 1.639 4 psig (27.6 kPag): 1.893 5 psig (34.5 kPag): 2.116 6 psig (41.4 kPag): 2.318 7 psig (48.3 kPag): 2.504 8 psig (55.2 kPag): 2.677 9 psig (62.1 kPag): 2.839 10 psig (69 kPag): 2.993 15 psig (103.4 kPag): 3.665 20 psig (137.9 kPag): 4.232 30 psig (206.9 kPag): 5.183 40 psig (275.8 kPag): 5.985 50 psig (344.8 kPag): 6.692 60 psig (413.7 kPag): 7.33 70 psig (482.7 kPag): 7.918 80 psig (551.6 kPag): 8.464 90 psig (620.6 kPag): 8.978 100 psig (689.5 kPag): 9.464

Flow Data Status

 N/A Generic