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 316 SS

Orifice Material

 N/A Synthetic Sapphire/Nylon Sleeve

Nominal Orifice Size

 N/A 20

CV

 N/A 0.0015

Maximum Operating Pressure

 N/A 100 psig

Connection A

 N/A 1/4" NPT Male

Connection B

 N/A 1/4" OD Tube Compression

Screened

 N/A None

Dimensions

Orifice Diameter

 N/A 0.0079 in

Width Across Flats (Hex)

 N/A 9/16 in

Total Length

 N/A 1.49 in

Width Across Flats (Hex) 2

 N/A 9/16 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: 0.161 5 psig: 0.350 10 psig: 0.480 15 psig: 0.613 20 psig: 0.730 25 psig: 0.843 30 psig: 0.958 40 psig: 1.18 50 psig: 1.41 60 psig: 1.64 70 psig: 1.87 80 psig: 2.09 90 psig: 2.32 100 psig: 2.55

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

 N/A 5 In. Hg.: 0.229 10 In. Hg.: 0.292

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

 N/A 15 In. Hg.: 0.320 20 In. Hg.: 0.320 30 In. Hg.: 0.320

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

 N/A 1 psig: 0.341 5 psig: 0.740 10 psig: 1.02 15 psig: 1.30 20 psig: 1.55 25 psig: 1.79 30 psig: 2.03 40 psig: 2.50 50 psig: 2.99 60 psig: 3.47 70 psig: 3.96 80 psig: 4.43 90 psig: 4.92 100 psig: 5.40

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

 N/A 5 In. Hg.: 0.485 10 In. Hg.: 0.619

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

 N/A 15 In. Hg.: 0.678 20 In. Hg.: 0.678 30 In. Hg.: 0.678