9 Litre Portable Silent Air Compressor Oil Free 8BAR 680W 0.9HP piston compressor. 9Litre Portable Silent Air Compressor Oil Free 8BAR 680W 0.9HP Piston Compressor. About the switch machine description. Turn off the air compressor switch first, then unplug the power supply, otherwise the airflow will rise, it will easily burn the motor and shorten the life of the machine. Oil-free maintenance No lubrication for product work, low cost, long life and lower maintenance costs 2...