The quality of the pellets depends on the thermomechanical accuracy of its preparation. Your pellet quality depends on the right combination of humidity, temperature and retention time depending on your material.
A conditioner must be adaptable and flexible to better conditioned your pellets.
The time that your material is in the conditioner depends on your needs. Especially because time and temperature create moisture and heat.
ESI conditioners add steam to ensure the rising of the temperature and have ideal retention times.