SW3 low-temperature series semi-hermetic screw compression (condensing) units range from 30HP to 880HP, according to user requirements, the compressor can be connected in parallel, the unit can reach 1320HP, with water-cooled compression and condensing units and compressor units for choice. The design and manufacture of the units fully meet the actual requirements of industrial refrigeration, and the design and arrangement of all components take into account the reliability and maintainability of the on-site operation. The unit is equipped with components such as RefComp SW3L series compressor, oil separator (condensers), gas-liquid separator, economizer, reservoir, start-up and control center.