The speed of oil-free air compressor has the function of changing the performance curve of the compressor. If the speed of the air compressor can be changed, the efficiency will not change.

Only the working point and working parameters of the air compressor are changed, and with the increase of the flow rate of the gas medium,

The pressure ratio drops from slow to steep, the power and efficiency rise from flat to slow down, and the flat section of the efficiency curve is the best working zone of the oil-free air compressor.

In this way, the operating efficiency of the oil-free air compressor can be optimized。

Therefore, the rotation speed from high to low determines the equipment service life of oil-free air compressors。