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See Chinese contents: GB 32284-2015 GB 32284-2015: Minimum allowable values of energy efficiency and energy efficiency grades for petrochemical centrifugal pumps
This Standard specifies the basic requirements for petrochemical centrifugal pumps, efficiency calculation methods for pumps, energy efficiency grades for pumps, minimum allowable values of energy efficiency for pumps, target minimum allowable values of energy efficiency for pumps, and evaluating values of energy conservation for pumps. This Standard applies to single-stage single-suction pumps and single-stage double-suction pumps with closed (maximum) impellers installed which deliver clean liquids.
