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There are a growing number of pellet mill manufactures, producing both small plus large scale pellet mills to process a range of raw materials from animal feed to animal bedding. For industrial applications there are a few key pellet mill manufactures. The designs of the pellet mills do differ, though all work on the principle of a roller as well as die compression principle and high temperature biomass pellet construction, here are a few of the manufacturers.

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Yet China still produces large quantities of flat die pellet mills for the small pellet construction market, the industrial and western market has now majority left flat die pellet mill design. The flat die pellet mill is the oldest design of pellet mill. The only western manufacturer producing flat die pellet mills is Kahl in Germany. One of the main reasons many manufactures have moved away from flat die pellet mills designs is because of concern over excessive die along with roller wear along with increased energy consumption compared to other designs. The principle of the accelerated roller as well as die wear comes from the fact the the contact point between the die plus roller on the inner as well as outer edge are turning at different speeds. Therefore this will generate a slipping action because of the difference in speed, leading to increased roller in addition to die wear. However this fact maybe true, there are some important points to consider compared to disc die designs. Generally flat die pellet mills are cheaper to make as well as so are the consumable parts. One of the key reasons is the die requires heat treatment to raise life. Yet circle dies can buckle under temperature treatment, mounting construction costs. Also it has been found that processing some low density raw materials it very hard with disc die pellet mills compared to flat die pellet mills. Therefore though flat die pellet mills may have their faults, it is not potential to discount flat die pellet mills altogether. For large scale industrial manufacturers, the common design now is the ring die pellet mill. Some manufactures of disc die pellet mills include CPM, Bliss and Comact. The ring die pellet mill has a disc created die with either 3 or maybe 3 rollers applying compression to the inner surface of the sphere. Material is entered into the centre of the ring, along with compressed owing to the die to the outside of the circle. As the roller plus die are turning at the same speed across the surface of the die, lower roller in addition to die wear is expected as well as also reduced fuel consumption per ton of pellets. Sphere die pellet mills on the other hand a very large in addition to very heavy, therefore they are only really practical form large scale pellet construction plants.

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There is a fairly new design of pellet mills that has two rotating dies, the only production of this design of pellet mill at this time is Pellet Systems International PSi. The two dies run next to each other similar to two rotating cogs. As matter enters between the two dies, the material is compressed because of each die, plus comes out in the centre of each die circle. Again energy consumption is stated to be lower.

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