... efficiently 4.high efficiency The DSR Series Three Lobes Roots Blower is the leading products of our company, adopt the ... advanced technology of Japan. The main characteristic of our roots blower is small volume, light weight, flow strong, noise small, ... to 4.23kw. The Application:Dealing water, Wastewater Treatment, Aeration tank, Air transporting, Mine, vacuum packaging, aquaculture and etc. The ...