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2.2.3 Working principles
ADH horizontal, centrifugal pumps must be installed below head with appropriate procedures to
avoid vortex formation and consequent air bubble suction. The pump must work ONLY when
PRIMED. The impeller - integrally joined to the shaft and to the direct drive mounted motor- must be
set in rotation at a preset speed (max 2.900 revs/min). Its centrifugal effect activates suction in the
main duct and delivery in the secondary duct.
WARNING: use of ADH horizontal, centrifugal pumps for anything other than that previously
described is to be considered improper use and is forbidden by AlphaDynamic Pumps SA .
Improper use.
It is SPECIFICALLY forbidden to use ADH pumps:
- for pumping petrol and/or flammable liquids
- for pumping food liquids
- with an opposite rotation to the one specified
- in self-priming working conditions
- for suction in the presence of vortexes, turbulence or air bubbles
- for creating vacuum
- with liquids that are chemically incompatible with the construction materials
- with solids in suspension that have a higher specific weight than the liquid (e.g. water and sand)
- with water that is particularly hard and/ or full of deposits
WARNING: due to the wide variety of products and chemical compositions, the operator is
considered to be the best evaluator of reactions and compatibility with the pump’s construction
materials. Therefore, before use, carry out all necessary checks and tests to avoid any possible
hazardous situation, that cannot be predicted or for which the manufacturer cannot be held liable.
WARNING: t he use of the pump that does not comply with the instructions indicated in the use
and maintenance manual will cancel compliance to the requirements for safety.
The risks associated with the use of the pump under the exact conditions set forth in the use and maintenance
manual have been analyzed, whilst the analysis of the risks associated with the interface with other system
components must be carried out by the installer.
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