Original Tewatt airend from USA, two stages, with latest rotor designing and reliable bearing. Integrated compression housing design, longer service life and stability. Input shaft adopt low pressure sealing structure, smaller gear size, optimized boosting performance to ensure longer life to the screw oil. High flow design reduces fuel consumption, and provides max. 50HP power margin according to the working condition and power demand. Build-in oil pump, ensuring the bearing get enough lubrication when starting.