Screw air compressor assembly : assembly begins with the core components : first, the screw host is fixed on the frame, the permanent magnet motor is accurately aligned, and the connecting bolt is locked with the torque wrench according to the standard torque to ensure the transmission without deviation ; then install the oil and gas separator, evenly apply the sealant to prevent air leakage and oil leakage. Then the control panel is assembled, and the start-stop and pressure adjustment functions are debugged. Finally, the shell is installed and pre-installed for trial operation : check the speed and exhaust pressure of the main engine, and check the sealing performance of the pipeline with the leak detector to ensure that the performance of the whole machine meets the standard.