Used and in very well maintained condition: low pressure screw compressor (booster) package (after overhaul only 3844 running hours), type unit GSV-II-50, type compressor GSV 50. This Gram/Frick screw package is equipped with shell & tube thermosiphon oil cooler, oil pump, Leroy Somer 45kW E-motor, Unisab II controller. Mentioned cooling capacity is at an evaporating temperature of -40°C and -10°C condensing with the refrigerant R717/ammonia.