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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    The restrictors incorporate a precision synthetic sapphire orifice which is fitted within a main body. The sapphire orifice is a stable, accurate flow restrictor. Standard sizes range from .0012" to .0252" orifice diameter in 32 increments.
Unit of Measure

Specifications

Material

 N/A 304 SS

CV

 N/A 0.011

Orifice Material

 N/A Sapphire/Nylon Sleeve

Nominal Orifice Size

 N/A 58

Maximum Operating Pressure

 N/A 100 psig

Connection A

 N/A 1/4" NPT Male

Connection B

 N/A SAE 37 DEG #4 7/16"-20 Male

Screened

 N/A None

Dimensions

Orifice Diameter

 N/A 0.0228 in

Width Across Flats (Hex)

 N/A 9/16 in

Total Length

 N/A 1.42 in

Orifice Diameter Accuracy

 N/A ±0.0003 in

Application

N/A

  • Precision Flow Control - Gases or Liquids
  • Accurate Timing in Pneumatic or Hydraulic Circuits
  • Pressure Dividing Circuits and Pneumatic Resistance Bridges
  • Impedance Matching
  • Uni-directional Flow

Flow Data

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

 N/A 1 psig: 1.38 5 psig: 3.26 10 psig: 4.43 15 psig: 5.55 20 psig: 6.55 25 psig: 7.53 30 psig: 8.48 40 psig: 10.4 50 psig: 12.3 60 psig: 14.2 70 psig: 16.0 80 psig: 17.9 90 psig: 19.7 100 psig: 21.6

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

 N/A 5 In. Hg.: 2.13 10 In. Hg.: 2.55

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

 N/A 15 In. Hg.: 2.77 20 In. Hg.: 2.77 30 In. Hg.: 2.77

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

 N/A 1 psig: 2.92 5 psig: 6.90 10 psig: 9.39 15 psig: 11.8 20 psig: 13.9 25 psig: 16.0 30 psig: 18.0 40 psig: 22.0 50 psig: 26.1 60 psig: 30.1 70 psig: 33.9 80 psig: 37.9 90 psig: 41.7 100 psig: 45.8

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

 N/A 5 In. Hg.: 4.51 10 In. Hg.: 5.40

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

 N/A 15 In. Hg.: 5.87 20 In. Hg.: 5.87 30 In. Hg.: 5.87