Uyilo lwe-impeller ene-impeller evaliweyo (umgangatho) kunye ne-impeller evulekileyo ngokuxhomekeke kwi-seizes(ZGPO).Eyona nto ihambelana neemeko ezahlukeneyo zokusebenza, i-impeller evaliweyo kunye nokusebenza okuphezulu, ixabiso eliphantsi le-NPSHr livula i-impeller ye-gaseous liquids, i-concentration ephezulu eqinile (ukuya kwi-10%), iimpompo ezine-NPSHr ephantsi kakhulu.