The rotor pump uses rubber covered rotors, mainly because rubber is oil, wear and corrosion resistant, and is made of fluoroelastomer, nitrile rubber and EPDM rubber. Different process options apply different characteristics, for example the transfer of oily sewage requires low shear to keep the transfer intact for the next step.
For example, in petroleum and petrochemical oil-bearing wastewater treatment, the need to break the emulsion to separate oil and water, before breaking the emulsion, the oil-bearing wastewater can not destroy the original state, the lobe pump low speed characteristics reflect the advantages of low speed to achieve low shear, to solve the problem of breakage caused by high-speed operation of the centrifugal pump.
In addition, taking into account self-priming capability, oil resistance, corrosion resistance and low maintenance costs, the lobe pump uses a rubber rotor to solve the problems of the stainless steel rotor, which has backflow and is not self-priming.
Therefore, lobe pumps with rubber covered rotors are economical in terms of comprehensive costs over the service life cycle for processes such as oil-bearing wastewater treatment in the petroleum and petrochemical industry and activated sludge treatment in sewage plants where rubber is suitable.