The impeller imewe na mechiri emechi impeller (ọkọlọtọ) na-emeghe impeller dabere seizes(ZGPO).Kacha mma nnabata na dị iche iche na-arụ ọrụ ọnọdụ, mechiri emechi impeller na elu efficiencies, ala NPSHr ụkpụrụ na-emeghe impeller maka nnọọ gas gas, elu siri ike itinye uche (ruo 10%), na nfuli nwere oke ala NPSHr.