Features:: 1. Quietness:because of its submergibility under water, so there will be not much noise from the machine when in use. 2. No need of a silencer:because of its under water, the created noise will be very low, so there will be no need to do silencer. Under-water can mean space-saving. 3. Strong structure, be relieved:the direct connect between the motor and the blower can avoid the inconvenience of traditionally-done belt adjustment. 4. Lower energy consumption:trundean roots blower are designed to control backflow pressure to the rotor in order to reduce energy consumption. 5. Longer bearing life:less vibration transmitted through the lobe results approximately 20% longer bearing life. -