4-in-1 All-in-One Permanent Magnet Screw Air Compressor Ctg Series 7.5~22kw

4-in-1 All-in-One Permanent Magnet Screw Air Compressor Ctg Series 7.5~22kw. High Efficiency Permanent Magnet Motor: Improves efficiency by 5-12% and reaches national level 1 energy efficiency standards. Low Noise Operation: Features reasonable magnetic field design and rear exhaust design for reduced noise. Constant Air Pressure Control: Open loop vector control with response time under 50ms for instant gas production adjustment. Compact and Lightweight Design: Eliminates excitation system for simple structure, high precision, and easy maintenance. High Starting Torque: Maximum starting torque to rated torque ratio exceeds 3 times, higher than asynchronous motors. Durable Oil-Cooled System: Uses Core Ndfeb magnetic steel, stainless steel pipes, and circular surface oil passage. Reliable Intake Valve System: Unique design prevents oil injection during emergency shutdowns or power outages. 24/7 After-Sales Support: Engineers available for overseas service with monthly and quarterly inspection schedules.