... , pneumatic conveying, chemical, metallurgy, aquaculture,electricpower,mining,etc. Roots Blower (high pressure type)1,low noise, spiral structure in air inlet and outlet, silencer ... ,stable ruuning, realized by the special design of rotor. 3,high efficiency and low energy consumption4,long service life5,convenient for ... the usage cost and convenient for the customer. Roots blower high pressure type