Universal Microsystems
High precision, restrictive flow orifices for
gas flow control
3350 Scott Blvd. Bldg 47
Santa Clara, California 95054
Phone: 408-532-6604
Fax: 408-727-4452
E-mail Us

   
Find a Sapphire Orifice Diameter
knowing gas flow desired and inlet pressure

Download Orifice Calculator    Excel file v2.0

or follow steps below


Step 1 		Convert application gas flow (in sccm)
to N2 equivalent flow
Divide by the K factor (see table or extended list)
      
      Extended list




Step 2


Convert application pressure units
to P in psia
Add 14.7 to psig value
Step 3 Find the sapphire diameter by matching the converted flow to the best value in the column for P

Note, orifice has a normal (N) or reverse (R) direction
If P isn't a table column convert to 20 Psig by multiplying flow by 34.7/P
                - Diameters up to .030" available. Flow scales with orifice area.

       

How to order Sapphire orifices
 
For quotes or additional information E-mail Us
Universal Microsystems