Semi-hermetic reciprocating compressors. Air conditioning (AC) and medium-low evaporating temperature (MT-LT) applications. Suction and discharge reed valves; "Venturi" depressor system for internal oil recovery. Refrigerants: R22, R407C, R404A-R507, R134a. 10¸70 HP (AC; MT). 6¸60 HP (LT). 4, 6 or 8 cylinders. Start-unloading system with special SU head (on request). Oil charge. High efficiency oil filter (only for models provided with forced lubrication). Forced lubrication (splasher lubrication available only for 6-20 HP models). Crankcase heater. Wide range of accessories for lubrication monitoring available. Capacity control through installation of one or two special heads, to stop the suction gas from entering the related compression chamber. Step regulation. Electronic motor protection device: motor temperature monitoring. Liquid injection and/or additional blower to widen the application range. Special motors with different power supply available.