energy variance. The BPV is then used to regulate the mechanical energy imposed upon the product, giving the system a single (one) screw profile for an entire range of products

Coupled with the high speed and high torque capability, this

4,000 lbs/hr, 1.18 sq.in. DOA

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60

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renders a system with a high level of versatility unmatched in the extrusion industry, especially when you consider traditional single screw extrusion technology.

The E975 has been specifically designed to operate in the pressure ranges consistent with the ever-changing dynamics of the petfood/pet treat process.

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) . t f . u c / . s b l ( y t i s n e D

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23

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) n o t / r H * W k ( E M S

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■ Die open area calculations and product specific mechanical energy specifications will also not directly correlate from existing production line configurations. These calculations will simply need to be reviewed prior to incorporation into the E975 Extruder. ■

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80 70 65 60
BPV Position (% Open)
Density (lb/cuft) SME (k W*hr/ton)

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Figure 1: The relationship between specifical mechanical energy (SME), or work imposed on the product, and its relationship to extrudate density. (DOA = die open area).