The U configuration of the RF cooler and its high volume capacity show the potential for the process of more than three batches which come out from the upper Hot Turbo-mixer. Our production range starts from the laboratory version of 5 Liters to the biggest version of 7500 Liters. Every technical feature can be chosen such as different construction materials, inlets configurations or discharging valves type, so to satisfy the most various requests of the clients. This choice, instead of the high efficiency horizontal cooler, ensure a good performance, granting a very good price/quality ratio. It is the most suitable product to feed the extruder line, without any need of intermediate buffer.