... piston air compressor 3kw power supply Low oil comsuption Very quite CE, ISO9001 Approved Specifications abt RC high end piston air ... Japan & sweden , greatly incleased the performance and service life of air valve ,Piston ring used Taiwan Riken , durable , non- ... shaft by high frequency quenching , enhanced the wear resitance of the productOil separator structure design ofthe front cover , ...