SAT (SA110-250) Dual-stage Compression Spiral Series

The GPS dual-stage compression screw air compressor utilizes oil injection to cool the high-temperature air after single-stage compression, resulting in isobaric compression and lower intake temperature. This makes the entire compression process approach isothermal compression, reducing power consumption. The lower pressure ratio in each stage of dual-stage compression significantly reduces leakage between rotor seals, improving compressor head volumetric efficiency. Theoretically, for the same power output, dual-stage compression can increase displacement by 8-15% compared to single-stage compression, resulting in energy savings of 8-15%. It offers optimal performance at continuous, long-term full-load operation.

In addition to high efficiency and energy saving, dual-stage compression also features stable and reliable characteristics. Achieving the operating pressure through dual-stage compression, with a small pressure ratio in each stage, means a small pressure difference between the intake and exhaust of each rotor stage, resulting in less stress on key components and lower thermal load. This also reduces bearing load, extends the service life of the main unit, and ensures efficient and reliable operation of the entire machine.


Between the single-stage and dual-stage compression chambers, oil injection cooling is introduced to replace the intercooler, which significantly reduces the loss of compressed air, while controlling the dew point temperature of the compressed air to the optimal level, preventing liquid water from entering the dual-stage main unit and causing corrosion, and also preventing oil emulsification.

Both single-stage and dual-stage main units incorporate partial axial air intake design, making full use of the effective length of the screw to optimize compression efficiency; reducing radial imbalance force to improve component life; and significantly reducing operating noise.

e-COOL™ Cooling Technology – A centrifugal fan draws in cooler air directly from outside the unit to cool the cooler, and exhausts hot air directly from the top. The cooler itself also has a large heat exchange area, resulting in excellent cooling performance. A series of intake holes located inside the unit simultaneously expel hot air from inside the unit to the top. This unique cooling flow field design keeps the air compressor's internal temperature consistently low while significantly reducing noise generated by fan operation.