KSB Centrifugal Pump Lexicon –

From A to Z

Free passage

The term free passage refers to a free, unrestricted impeller passage and defines the max. permissible diameter solid substances (fruit, vegetables, etc. in the food industry, for example) may have to pass the impeller without causing clogging.
It is specified in mm as a spherical diameter or with rectangular dimensions in the characteristic curves of free-flow, channel or single-vane impellers (also see Impeller).



  

  

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