For 500 kg/h for making animal feed pellets, FDF260 flat die with 400-500 kg/h will be ok.

For 800 kg/h for making animal feed pellets, FDF360 flat die with 700-800 kg/h will be ok.

Yes, the flat die feed pellet making machines can work for 6 or 8 hour continuous, and please kindly add lubricating oil each 4 hours. That will be better.