Geelen Counterflow Geelen Counterflow VK-RS triple grid cooler operates by sucking air through a product bed that is variable in depth. New product is fed in through the inlet valve and then the Triple Grid discharger releases cooled product into the hopper. A temperature or level sensor powers the gear motor driven discharger, while discharging speed is adjustable through a hand wheel or two-position system with pneumatic cylinder. The Triple Grid discharger is particularly suited to pelleted products with good flowing capabilities, such as feed pellets, the company says.