The main technical parameters of a rotary screw air compressor include but are not limited to the following:

1. Displacement (m³/min): It refers to the volume of air discharged by the compressor per unit of time, also known as flow rate or volumetric flow rate.
2. Discharge pressure (MPa): It indicates the pressure of the air at the compressor’s outlet, usually measured in megapascals (MPa).
3. Rotational speed (n/min): It refers to the speed at which the main shaft of the compressor rotates, measured in revolutions per minute (n/min).
4. Rated current (A): It indicates the current required by the compressor under rated working conditions, measured in amperes (A).
5. Rated voltage (V): It refers to the rated voltage required by the compressor, typically measured in volts (V).
6. Power (kW): It indicates the rated power of the compressor, i.e., the power consumption of the compressor under rated working conditions.
7. Oil content (ppm): It refers to the amount of oil present in the compressed air, usually measured in parts per million (ppm).
8. Intake temperature: It indicates the temperature of the air entering the compressor.
9. Discharge temperature: It refers to the temperature of the compressed air being discharged from the compressor.

These technical parameters may vary depending on the specific model and application requirements of the screw air compressor. These parameters are crucial for selecting the appropriate rotary screw air compressor to meet specific application needs.