The Precision Micro-Orifices® are constructedof brass or stainless steel withorifice sizes from .0003" to .005" diameter.The orifices are used to accurately metervery low flow rates of gases or liquids.Optional stainless steel screens are availableto protect the tiny orifices from minutecontamination particles.
Unit of Measure

Material

 316 SS

Nominal Orifice Size

 1E

CV

 0.0000477

Maximum Operating Pressure Gauge

 4000 psig

Accuracy
    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
    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
    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.

Optional Screens
    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.

Ordering Information
    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.

Connection A

 1/4" OD Tube

Connection B

 1/4" OD Tube

Screened

 None