The CMP32 refrigeration pump is a multi-stage pump that adopts high-pressure internal circulation. Part of the medium is diverted from the high-pressure area at the outlet of the secondary impeller, flows into the shielded motor rotor cavity through the filter, and returns to the sub-high-pressure area of the secondary impeller through the axial hole. This high-pressure internal circulation method fully ensures the pressure in the rotor cavity of the shielded motor and prevents the medium from vaporizing in the pump.
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