It is a rotary machine in vertical construction; fixed flat horizontal die gives it stability in operation. Unique feature of pellet press as compared to other densification is, it is not size specific. Any Pellet mill can give pellet output of 8mm – 25 mm dia. Die of different thickness can be accommodated in same frame with no effect on stability.
Vertical construction of pellet press, houses speed reduction unit at bottom of press. Three support vertical shaft is used to transmit power to pelletising rollers. 2-4 rollers depending upon size of unit, run at very slow speed on surface of fixed die and forces the material in die holes. In built lubrication is incorporated in small press while pressurized lubrication with optional cooling facility is provided in large units.
Power from electrical drive motor is transmitted to pellet press by belting.

For size reduction of incoming biomass and converting them ito granules, swing hammer grinder are used. Light hammer moving at high speed cut the straw/husk etc into granules. Hammer is provided with feeding screw, discharge screw and dust separation & filtering system.

For cooling the incoming pellet at 80 – 850C, ambient air fans are used. Pellet travels on screen conveyor and Axial flow fan forces the air through pellets. Cooling of hot pellets increases the strength of pellet. Free moisture on pellet surface is reduced on cooling conveyors.

For conditioning the incoming granular material low-pressure steam is generated in fire tube boilers. Pellet is used for giving the required thermal energy. Boiler has three compartments, water heating water boiling and steam compartments.