There are many types of pumps and the coexistence of old and new models. The codes in the pump models (usually Chinese pinyin letters) differ greatly from the meaning of numbers. Therefore, special attention should be paid to the selection and the meaning of model and code should be clarified. Will not choose the wrong. Here are some common examples of agricultural pumps to illustrate the specific model. 1,50BPZCZ-45 type. BP - sprinkler single suction centrifugal pump; Z - self-priming; CZ - direct connection with the diesel engine; 45 - head (m). 2,150S-50 type. S - single-stage double-suction horizontal centrifugal pump; 150 - inlet diameter (mm); 50 - head (m). 3, WB40-40-105 (550B). WB - micro centrifugal pump; 40 - inlet and outlet diameter (mm); 105 - blade diameter (mm); 550 - motor power (W); B - single-phase power. 4.Q40-16-3 type. Q - dry pump on the submersible pump; 40 - flow (m 3 / hour); 16 - head (m); 3 - motor power (kW).