A Water cooled vertical submersible V3/V4 has vanes fitted on either side of the rim that revolve in a ring-like conduit in the pump’s casing. The fluid does not release from the tip of the impeller but is re-circulated back to the bottom of the impeller. This re-circulation or regeneration is how the pump re-primes itself. These pumps are appropriate for handling clear cold fresh water, free from abrasive particles plus chemically aggressive substances.
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