NATIONAL COOLING SYSTEM designed Air Blast Cooler are of small size, lightweight, and low noise, created for incorporation into client’s machines. The Air Cooled Oil Heat Exchanger is built up of shallow tubes with internal turbulators and external fins on all contact surfaces, resulting in a hugely efficient heat transfer. Multipass versions are especially suitable for low-flow applications. The fans are external rotor motor types with ZZ ball bearing for maintenance-free operation. Digital Temperature Indicator is also installed to indicate oil temperature.