principle rotary pump
Source Wikipedia : principle rotary pump

Rotary pumps

Because of their simple and solid construction type, rotary pumps are widespread and usually not self-priming. You will find single and double level rotary pumps on biomass-systems.


Powered by an electric motor, they work with a raisepressure up to 2,5 bars. They will pump prevailingly liquid substrates with a dry-substance-content <8%. These pumps will run at 1500 to 3000 rpm.

Rotary pumps as well as submerge-motor rotary pumps are characterized by high supporting powers (up to 30m³/min). At single-level rotary pumps, the barrel is built up like a cone. The substrate will be fed from the top of the cone to the axis direction of the running wheel.

After exiting from the running wheel, the substrates will be flung in a right angle against the wall of the barrel and will be fed to the pressurepipe through a spiral canal. The barrel absorbs the power and the inside-pressure of the associated pipesystem. Submerge-motor rotary pumps are plunged into the substrates and prime the substrates straightly.

At a decrescent discharge height, the capacity of delivery will increase at a steady power input. Rotary pumps have an input between 4-15 kws at discharge height for liquid manors up to 4 ms.