It has been proved many times that pressure differently affects to different production formulas. It is very hard to determine what pressure value is best. Usually 3,5 bar is a satisfactory value.

It has been also checked that depending on pressure the productivity of pellet mill can insignificantly change.

The high pressure is preferred, though it is always connected with problems with safety.
It is sure, that best results can be achieved performing many tries with different values of pressure.
Changes in range from 1 to 5 bars should let us find optimal pressure.

It is very important to provide the steam system with transporting pipes with proper diameter for a given pressure