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?
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?




