The Thermal Transfer Products COL series is designed as an air-cooled offline fluid regulation system which eliminates the need for use of the complex main system for system oil cooling and filtration. The system is developed base on the reliable and efficient screw pump technology so that it can operate independently without interference with the main system to complete the cooling and filtration of system oil independently, which effectively improves the oil quality, extends the service life of equipment and ensures stable operation of equipment, thus reducing the maintenance cost and shutdown risk.