... using the design ideas of the greater rotor, bigger bearing, low-speed ", speed lower than other brands up to 30 ~ 50%, this ... and 250KW are 4 pole motor Direct drive, speed as low as 1480 r / min.Four, fully meet or exceed the national standard ... GB19153-2003 "air compressors energy efficiency limitSpecification: Model Capacity (m3/min) Working pressure (MPa) Motor power (kw) Connector Weight (kg) ...