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 Precision Micro-Orifices® are constructed of brass or stainless steel with orifice sizes from .0003" to .005" diameter. The orifices are used to accurately meter very low flow rates of gases or liquids.
Unit of Measure

Specifications

Material

 N/A Brass

Nominal Orifice Size

 N/A 3E

CV

 N/A 0.000258

Maximum Operating Pressure Gauge

 N/A 2000 psig

Connection

 N/A 0.258/0.259" Press-Fit Insert

Screened

 N/A None

Dimensions

Orifice Diameter

 N/A 0.0035 in

Total Length

 N/A 0.156 in

Outside Diameter

 N/A 0.258/0.259 in

Application

N/A

  • Precision metering of very low flow rates – gases
  • Standard for flow or leak rates
  • Accurate timing in pneumatic circuits
  • Flow limiting

Features

Features

 N/A
  • High temperature capability (Type BLP, IBLP, K4LP, IALP)
  • High pressure capability (Type BLP, K4LP, IBLP, IALP)
  • Bi-directional flow
  • High accuracy
  • NIST traceable
  • Optional in-line screens available (except Type IBLP, IALP)
  • Orifice calibration available

Information

Accuracy

 N/A
    Standard Precision Micro-Orifices®are produced with very accurate characteristics and are production tested at an air supply pressure of 25 psig. The Flow Data tab lists the nominal flow at 25 psig and the accuracy of the measured flow for each orifice size.

Calibration

 N/A
    Measured air flow data is optionally available. Twenty flow data points, over the specified supply pressure range, are measured with NIST traceable instruments.

Custom Orifice Sizes

 N/A
    Custom orifice sizes, .0003" diameter and larger, can be produced to exacting air pressure and flow specifications. Using electronic pressure and flow measuring equipment that is NIST traceable, the custom Micro-Orifices® are produced to customer specifications. These custom orifices are available in types BLP, MLP, QXLP, IBLP, K4LP, IALP and Y2LPSS. A certificate of compliance to customer specifications is provided for all custom Micro-Orifices®. Contact factory for further details.

Ordering Information

 N/A
    Identify the part number of Micro-Orifices® using the complete detail on the chart at right. See examples also. For orifice assemblies without optional screens, use the base number only. For assemblies that include screens, add the suffixes shown in the table. Both inlet and outlet screens are rated for 15 microns.

Flow Data

Air Flow Pressure at Standard Cubic Centimeters per Minute (SCCM)

 N/A 5 psig: 90.6 10 psig: 133 15 psig: 164 20 psig: 194 25 psig: 220 30 psig: 250 40 psig: 309 50 psig: 369 60 psig: 428 70 psig: 487 80 psig: 542 90 psig: 602 100 psig: 662

Flow Accuracy at Pressure - Standard Cubic Centimeters per Minute (SCCM)

 N/A 25 psig: ± 10

Flow Data Status

 N/A Generic