Compatible rotor for Grundfos UP20-45N

[raananh]

Hi Everyone,
The ceramic bearings on the rotor of my Grundfos UP 20-45N (stainless head) gave up.
I checked my other UPS 32-80 (cast iron head) and the rotor was almost the same - just the impeller suction circle was too wide for the suction hole of the stainless pump head.

Other than buying a new pump (quite expensive):
1. Is it possible to buy just the rotor/impeller combo online?
2. If not, which used Grundfos pump can I buy that might have a compatible rotor/impeller? (Impeller doesn't have to be the same, just to fit the suction hole)

Dimensions:
Impeller: 67/32mm (outer/suction diameters). Pump suction hole is 34mm diameter, inside an 82mm chamber.
Rotor: 53.8mm diameter (the heavy part that enters the sleeve). Shaft is 98mm length 10mm diameter.

Thanks for any help,
raanan

 

[D_Hailsham]

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