In this heat exchanger because of the continuous scraping of the surface long running time is achieved which helps in better heat transfer efficiency and decreases the fouling of the system.
The scrapping is done by a blade unit operated by a motor-driven shaft with a timer moving inside the frame. This heat exchanger is normally used for heat transfer of highly viscous fluid by increasing the turbulence of the fluid. Maintenance cost is less compared to other types because of the auto-cleaning process.