Coperion Strand Cooling Trough Type CT pelletizers can be ordered in multiple versions, with trough width up to 1,000 mm, depth up to 250 mm and length up to 10,000 mm. They are made out of stainless steel, and strand guide rolls are available in different materials. The strands are cooled by process water, and the heat exchanger cools the process water via chilled water.