... volume: 1200m3/h-22000m3/h 3.suck sand &mud double-walled dredge pump------1.material:Cr26-30CrNiMo2.dilivery volume: 1200m3/h---22000m3 ... super suction and over-flow capability, continuously pumping gravel and high mold clay block.6.It can be equipped with diesel ... working stability, little vibration, low noise and low hydraulic loss, high efficiency, low fuel consumption and small size, light weight, ...