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 Brass

CV

 N/A 0.01

Orifice Material

 N/A Sapphire/Nylon Sleeve

Nominal Orifice Size

 N/A 54

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 0.0213 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: 1.12 5 psig: 2.57 10 psig: 3.45 15 psig: 4.43 20 psig: 5.31 25 psig: 6.11 30 psig: 6.90 40 psig: 8.50 50 psig: 10.1 60 psig: 11.7 70 psig: 13.3 80 psig: 14.8 90 psig: 16.4 100 psig: 18.0

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

 N/A 5 In. Hg.: 1.64 10 In. Hg.: 2.11

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

 N/A 15 In. Hg.: 2.39 20 In. Hg.: 2.39 30 In. Hg.: 2.39

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

 N/A 1 psig: 2.37 5 psig: 5.44 10 psig: 7.31 15 psig: 9.39 20 psig: 11.3 25 psig: 12.9 30 psig: 14.6 40 psig: 18.0 50 psig: 21.4 60 psig: 24.8 70 psig: 28.2 80 psig: 31.4 90 psig: 34.7 100 psig: 38.1

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

 N/A 5 In. Hg.: 3.47 10 In. Hg.: 4.47

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

 N/A 15 In. Hg.: 5.06 20 In. Hg.: 5.06 30 In. Hg.: 5.06