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KSB-Rio N / Z N Circulator Pumps with Manual Speed Control




Maintenance-free, glandless wet rotor pump, flanged or screw-ended, with three speed levels; in twin pump design (Rio Z) for standby operation with integrated swing check valve or, on option, peak load operation (parallel operation).



Hot water heating systems, heat recovery systems and cooling circuits in air-conditioning systems.


Operating modes

▪ Different speed levels


Automatic functions

▪ Full motor protection with integrated trip electronics
(from size 25-70 motor protection to be provided by the



Overview of technical data
Type of bearing Plain bearings
Drive Electric motor
Drive frequency 50 Hz / 60 Hz
Type of drive Electric motor
Drive voltage Low voltage
Connection to power supply 400 V, 3~; 230 V, 1~
Impeller material (EN standard) POLYPROPYLEN
Type of installation In- line
Type of coupling None
Type of lubrication Oil / Product lubrication
Max. permissible fluid temperature 120 °C
Nozzle position In- line
Maximum rated pressure (discharge) PN 10
Pump set location Dry installed
Shaft material (EN standard) X 46 CR 13
Suction characteristics Non- priming
Type of casing Volute casing
Type of impeller Closed / Radial
Type of connection Screw- ended, flange
UNSPSC classification 4015150300
Casing material (EN standard) EN- GJL-250
eClass assignment 36410105; 36410101;36410100;36410000
Maximum head 4, 00 m
Installation position Horizontal or vertical
Shaft seal type Seal- less
Main applications Building services; Water
Casing material Cast iron
Maximum discharge-side pressure 10 bar
Type of installation Stationary
Maximum flow rate 76 m³/h
Maximum speed of rotation 2. 800 1/min


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