System of Measurement System of Measurement 


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Connection Style Connection Style 

Barbed  
Connection Type Connection Type 

Tube  
Orifice Diameter Orifice Diameter 




Water Flow Water Flow 


For Tube ID For Tube ID 


Air Flow Air Flow 

Body Material Body Material 


Orifice Type Orifice Type 


Maximum Temperature Maximum Temperature 


Maximum Pressure Maximum Pressure 


OD OD 


Overall Length Overall Length 


Gender Gender 


Minimum Temperature Minimum Temperature 


Valve Type Valve Type 


Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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Insert the barbed ends of these orifices into rubber and soft plastic tubing, and secure them with a clamp. Also known as flow restrictors and precision orifice valves, they are used to throttle, vent, bleed, or regulate the flow of liquids and gases.
Available Orifice Diameters  

Orifice Dia.  Water Flow  Air Flow 
0.01"  0.016 gpm @ 40 psi  0.3 scfm @ 40 psi 
0.016"  0.035 gpm @ 40 psi  0.5 scfm @ 40 psi 
0.018"  0.046 gpm @ 40 psi  0.6 scfm @ 40 psi 
0.02"  0.056 gpm @ 40 psi  0.6 scfm @ 40 psi 
0.021"  0.061 gpm @ 40 psi  0.7 scfm @ 40 psi 
0.023"  0.076 gpm @ 40 psi  0.7 scfm @ 40 psi 
0.024"  0.082 gpm @ 40 psi  0.7 scfm @ 40 psi 
0.025"  0.089 gpm @ 40 psi  0.8 scfm @ 40 psi 
0.026"  0.101 gpm @ 40 psi  0.8 scfm @ 40 psi 
0.028"  0.114 gpm @ 40 psi  0.9 scfm @ 40 psi 
0.029"  0.12 gpm @ 40 psi  0.9 scfm @ 40 psi 
0.032"  0.152 gpm @ 40 psi  1.1 scfm @ 40 psi 
0.033"  0.158 gpm @ 40 psi  1.1 scfm @ 40 psi 
0.035"  0.177 gpm @ 40 psi  1.2 scfm @ 40 psi 
0.038"  0.202 gpm @ 40 psi  1.2 scfm @ 40 psi 
0.04"  0.228 gpm @ 40 psi  1.3 scfm @ 40 psi 
0.042"  0.247 gpm @ 40 psi  1.4 scfm @ 40 psi 
0.047"  0.304 gpm @ 40 psi  1.5 scfm @ 40 psi 
0.052"  0.373 gpm @ 40 psi  1.6 scfm @ 40 psi 
0.055"  0.43 gpm @ 40 psi  1.7 scfm @ 40 psi 
0.063"  0.557 gpm @ 40 psi  2 scfm @ 40 psi 
0.125"  2.34 gpm @ 40 psi  4 scfm @ 40 psi 
For Tube ID  Lg.  Each  
Barbed × Barbed  

1/4"  1 5/16"  0000000  000000 