There are several types of cooling systems used in pipe and profile processing applications. Spray Tanks, Vacuum Sizing Tanks, Calibration Tables and Troughs. One or more will be used in most plastic pipe and profile production. Spray Tanks contain several nozzles that cool the plastic product by spraying water on it as it passes through production. Vacuum Sizing Tanks place a vacuum on the product to retain the shape as the cooling takes place. Calibrations Tables allow complex profiles to be cooled in specific shapes where careful adjustments need to be made. Troughs are basically a place for circulating water to cool the product at the proper rate.