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Selecting Orifice Plate Type for Viscous Fluids

Selecting Orifice Plate Type for Viscous Fluids

Selecting Orifice Plate Type for Viscous Fluids

(OP)
I am building a test rig to measure the pressure drop in a 1" line using an orifice (restriction) plate.  The other entity that will be directly measured is oil temperature.  Flow will not be measured directly but calculated using the empirical data.  I want to then compare the experimental results with the theoretical values.  

1) If the fluid used has a kinematic viscosity of over 10,000 cSt at -20 deg. C, is a sharp-edged orifice plate sufficient, or is a quadrant orifice plate required to keep the discharge coefficient predictable?  Or is there another inexpensive option to help me achieve good correlation between measured and theoretical?

2) I have a 2" flange union set available and wonder if it is possible to inexpensively "adapt" it with a threaded sleeve for a 1" line without compromising the fluid flow pattern?

 

 

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