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The developed assembly is a Water Controlled Pump Assembly (WCPA) consisting of a hydraulic pump with its mechanical (bearings, seals) and hydraulic fittings. This pump is driven with a brush-less DC motor and its Electronic Control Unit. The manufactured pump package has been made according to ESA specifications. The optimal combination of hydraulic and electro-mechanic is the key of the high overall efficiency: more than 30%.

A new configuration of centrifugal waste liquid separator is presently under development in Microtecnica. Its main feature is the single shaft configuration, which means only one motor drives both the separator sub-assy and the fan, which is unusual for this class of separator. This paper will describe all the reasons for this selection, the features of the system, the performances and the results obtained at the present stage of development.