Nowadays people’s consciousness of energy saving and environment protection have greatly enhanced. To accelerate the development of green fuel, wood pellet press machines have an important improvement in the component of the press to make it suitable for processing high density pellets like wood pellets for home heating use.

Wood press is the core piece of pelletiziing equipment in the pellet plant. There are various classification schemes of pellet mills. Generally speaking, the pellet presses can be divided into small scales and large scales. Small scale pellet press is usually the same as flat die pellet mill which is quite fit in producing wood pellets on a small scale just for residential use. While large scale pellet press always means processing pellets on a large scale for industrial purpose. Flat die pellet press emerges first and ring die pellet press comes later. The flat die pellet making machine works in principle of vertical and small size, and is affordable for most consumers. However, the ring shape pellet press is much bigger than the flat one, and the rollers are just part of the die.

The wood pellets made by pellet press are a very popular renewable fuel on current market and meet most of today's concerns for renewable energy and environment.
According to different using purposes, wood pellet press machines can process these pellets with different lengths and sizes. Always the pellets themselves have a cylindrical form at the range of 6-8mm in diameter and are no longer than 38mm. After made into uniform solid pellets form, pellets will be easily managed, because they are free flowing, and virtually dust free fuel. According to the Pellet Fuel Institute (PFI), an association of stove producers, fuel producers and their suppliers, has established two residential fuel standards for wood pellets. They divide wood pellets made by wood pellet press machines into two grades: Premium Grade and Standard Grade. The two standards help fuel consumers to select the wood pellets best suited to their particular stoves or furnaces.