The Van Aarsen counterflow cooling system is designed for cooling pellets after pelletizing back to ± 5°C above ambient air temperature. This is done to achieve a good PDI, flow ability, protect against decay and minimize chemical and biochemical reactions.
In a nutshell
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Octagonal construction for optimal filling of the cooler
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Continuous pellet discharge for optimal cooling process
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Complete emptying of the cooler, to minimize cross contamination and maximize hygienic operation
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Limited damaging of the product due to discharge mechanism
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Ultrasonic continuous layer thickness measurement to ensure and/or control retention time in cooler
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Automatic air flow control by motor-operated air valve to regulate air speed in cooler (positioned after filter cyclone, before fan)
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Cooler bin walls and hood in stainless steel to avoid corrosion
Counterflow coolers
The counterflow cooling principle was invented by Van Aarsen and has become a standard blue print, copied all over the world within the compound feed industry.