FIELD: pumps.
SUBSTANCE: present invention relates to pump unit (1), in particular a circulation pump unit, with hydraulic housing (3) formed on hydraulic housing (3) by suction pipe (8) formed on hydraulic housing (3) by pressure connection pipe (10), flow chamber (16) at least partially limited by means of hydraulic housing (3), impeller (18) located in flow chamber (16) and driven into rotation around axis (A) of rotation by means of impeller shaft (15). According to the invention, hydraulic housing (3) has inner wall (27) limiting flow chamber (16) and outer wall (28) located at a distance from inner wall (27), wherein inner wall (27) and outer wall (28) form heat chamber (29).
EFFECT: disclosed is a pumping unit.
11 cl, 6 dwg
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