Measuring Viscosity is a bit outside of scope, and not something I am an expert on. I do however have a chemist on staff who I can have get back to you on that. I know there are floats and other tests that can be performed.
To be honest, we don’t know. We have not come across any fluids we have not been able to handle yet, due to the combination of pressure, temperature, and time. We just did an install last week with a customer who was using some of the thickest distillate we have ever seen and we were able to get it flowing at 20psi / 60c / 4 second stroke.
Temp, speed, pressure… It is all a balancing act. We can help you find and maintain that balance.
FYI this thread should be more more detailed.