in Industry, RMG capacity is calculated in liter from OEM only. My recommendation is that don’t measure capacity of any RMG just plan a batch with the help of RMG capacity, tentative bulk density of blend & other behavior of blend during pre & post granulation process.
However there are many method to measure the any equipment volume capacity.
- Mathematical calculation of volume (capacity) through auto-cad drawing (Part wise)
- Over flow capacity of known liquid
- Other method counter check method as describe by Sajjad ahmed.