Single and three-phse motors,Single-Phase version comes with manually resettable overload cutout for protection against engine overheating and power supply cable with adapter for single-phase version. Splash lubrication, forced ventilation, high-effciency conveyor, onebloc cast-iron cylinder, die-cast aluminium valve plate and steel valves, end manifold for air cooling at tank inlet, full-pressure gauges, whereas the 100.150 and 200-litres versions are equipped with 25¦Ì 3/8" filter reducer with 2 outlets.