1, D-type multi-stage centrifugal pump products overview: D-type pump of the multi-level sub-suction centrifugal pumps for water delivery and physical and chemical properties similar to those of liquid water use. The pump head for 19-245.7 m, flow to 18��162 m3 / h. The maximum temperature of liquid does not exceed 80 ¡æ, widely used in mine drainage, factories and urban water use. 2, D-suction pump of the single multi-level sub-type of centrifugal pump significance: For example: 80 D12 * 5 80 - inhaled mouth diameter (mm) D-alone multi-level sub-suction centrifugal pump 12 - single-stage lift (m) 5 - the number of impeller