FIELD: engines and pumps.
SUBSTANCE: invention relates to circulation constant-rpm rotary pump. This pump incorporates at least one impeller, pump casing and motor with permanent magnet supplied from circuit. It features "head-capacity" curve (4) with head H0 (28) at zero capacity and head Href (30) corresponding to maximum hydraulic power. At least one impeller includes vanes shape so that Href (30) is larger than H0 (28).
EFFECT: los-cost low power consumption pump.
10 cl, 10 dwg
