Pump Station Impellers

Jodi Beuder Blog, Jensen Water Resource Blog, Pump Stations

Selection of the proper type of impeller for your application can have a significant bearing on the applications ultimate success. We desire high efficiency but also need good reliability and a minimal amount of ongoing maintenance. All of these considerations come into play when selecting the right impeller style. Non-clog Impellers Often in the sewage or wastewater industry impellers are designed with a minimal number of vanes to allow particulate to pass without fouling the impeller. Some designs have only one vane that wraps around the impeller. More commonly, two and three vane designs are used to improve performance while …

Pump Stations: Thrust Balancing

Bryan Bach Blog, Jensen Water Resource Blog, Pump Stations

Radial Loads When pumps operate away from their BEP, the pumps will generate uneven pressure forces inside the volute casing causing a radial thrust load on the impeller. The radial thrust load has many detrimental effects on the life of the pump. The first and most obvious is a loading on the bearings. Increased radial loads cause higher bearing reaction forces decreasing the life of the bearing. The force applied to the impeller increases as we move further and further away from the best efficiency point. Another problem caused from radial loading is the slight bending of the pump shaft, …