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
Print Back
    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. Optional stainless steel screens are available to protect the tiny orifices from minute contamination particles.
Unit of Measure

Specifications

Material

 N/A 303 SS

Nominal Orifice Size

 N/A 0C

CV

 N/A 0.0000019

Maximum Operating Pressure

 N/A 4000 psig

Optional Screens

 N/A
    Micro-Orifices® must be used with extremely clean fluids (filtered to .03 microns). Otherwise, there is a high probability of clogging the orifice with solid particles. Even with clean fluids, there is also the possibility of introducing contaminants during assembly of the fluid system. To minimize the possibility of clogging small orifices, it is recommended that screens be installed on the upstream and downstream sides of the orifice, to protect against handling contamination. Fifteen micron screens are normally used with Micro-Orifices®, to minimize contamination that occurs during handling or assembly. Screen material is stainless steel.

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.

Connection A

 N/A 1/8" NPT Male

Connection B

 N/A 1/8" NPT Male

Screened

 N/A None

Dimensions

Orifice Diameter

 N/A 0.0003 in

Width Across Flats (Hex)

 N/A 7/16 in

Total Length

 N/A 0.970 in

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

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

Application

N/A

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

Flow Data

Air Flow at Pressure - Standard Cu. Cm. Per Minute (SCCM)

 N/A 5 psig: 0.50 cm³/min 10 psig: 0.72 cm³/min 15 psig: 0.90 cm³/min 20 psig: 1.08 cm³/min 25 psig: 1.24 cm³/min 30 psig: 1.40 cm³/min 40 psig: 1.74 cm³/min 50 psig: 2.09 cm³/min 60 psig: 2.42 cm³/min 70 psig: 2.76 cm³/min 80 psig: 3.09 cm³/min 90 psig: 3.45 cm³/min 100 psig: 3.80 cm³/min

Flow Accuracy at Pressure - Standard Cu. Cm. Per Minute (SCCM)

 N/A 25 psig: ± 0.40 cm³/min

Flow Data Status

 N/A Generic