WPII motors are typically 2-3 DBA quieter than ODP motors, but when faced with sound restrictions, you should always ask to be sure. This enclosure also isolates all critical motor components from the surroundings. It can be used indoors or outdoors, and in clean or dirty environments. Motor heat is conducted away by circulating water and not by discharged air. The heat exchanger must be constructed as to resist ambient conditions that could cause corrosion.
External air is drawn in by a shaft mounted fan enclosed in a housing located opposite the drive.
The air is forced through the cooling tubes at high velocity to promote efficient cooling and cleaning of the tubes. Typical sound levels are around 90DBA, so if there are sound restrictions, ask for a lower sound design. The heat exchanger must be constructed as to resist ambient conditions that could cause corrosion. Totally Enclosed Fan Cooled - This enclosure is often supplied on smaller motors for compressors where isolation of critical motor components from the surroundings is required. Most of these designs use a round, cast-iron ribbed construction design, where the cooling air is pulled through the grill of the external shaft mounted fan and is directed over the frame fins by the fan hood.