Sanitary pumps
Sanitary pumps
Sanitary pumps
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Construction<br />
<strong>Sanitary</strong> <strong>pumps</strong><br />
Pumps<br />
Please see subsection construction in the individual<br />
pump chapters at the beginning of this data booklet.<br />
Impellers<br />
Grundfos offers four impeller types suitable for different<br />
liquids and applications. Not all impeller types are<br />
available for the complete product range.<br />
The two-channel, closed impeller is suitable for pumped<br />
liquids containing solid particles.<br />
The standard, closed impeller is suitable for pumped<br />
liquids with a low content of solid particles. This impeller<br />
type has the highest efficiency.<br />
The closed impellers are not fitted in durietta 0.<br />
Free-flow impeller<br />
Semi-open impeller<br />
GR9393<br />
Fig. 31 Semi-open impeller<br />
The electro-polished, stainless steel, semi-open impeller<br />
is available in three versions, according to the application.<br />
Impeller version Application Surface finish<br />
Cast Industrial/hygienic 3A0 to 3A1<br />
Welded Industrial/hygienic 3A0 to 3A1<br />
Milled Industrial/hygienic/sterile 3A2 to 3A3<br />
For surface finish requirements, see page 56.<br />
The impeller is suitable for low-viscosity liquids and<br />
liquids containing particles.<br />
The semi-open impeller is not fitted in durietta 0.<br />
GR9394<br />
Fig. 33 Free-flow impeller<br />
The electro-polished, stainless steel, free-flow impeller is<br />
available in two versions, according to the application.<br />
Impeller version Application Surface finish<br />
Cast Industrial/hygienic 3A0 to 3A1<br />
Welded Industrial/hygienic 3A0 to 3A1<br />
For surface finish requirements, see page 56.<br />
The non-clogging, free-flow impeller is designed for<br />
pumped liquids with a high content of solid particles or<br />
fibres.<br />
Star impeller<br />
Closed impeller<br />
GRA0393p<br />
Two-channel, closed<br />
Fig. 32 Closed impellers<br />
Standard, closed<br />
Both types of electro-polished, stainless steel, closed<br />
impeller are available in two versions, according to the<br />
application.<br />
GR9391 - GR9392<br />
Fig. 34 Star impeller<br />
The electro-polished, stainless steel, star impeller is<br />
available in one version.<br />
Impeller version Application Surface finish<br />
Cast Industrial/hygienic 3A0 to 3A1<br />
For surface finish requirements, see page 56.<br />
The highly efficient, self-priming star impeller is suitable<br />
for pumped liquids with a low content of solid particles.<br />
Impeller version Application Surface finish<br />
Cast Industrial/hygienic 3A0 to 3A1<br />
Welded Industrial/hygienic 3A0 to 3A1<br />
For surface finish requirements, see page 56.<br />
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