... Head: 4 - 21m ISO certificate CE certificate Submersible Axial-Flow/Mixed-Flow Sewage Pump. Specifications:1) Features: a) High efficiencyb) ... c) Mild sewage drainaged) Water transfer project3) Technical data:a) Flow: 500 - 30,888cbm/hb) Head: 4 - 21mc) Medium ... with the ecessary selection. ApplicationQZ QH series, reliable, mixed flow pump application scope for industry, agriculture, city water supply ...