Impeller Trimming

Trimming reduces the impeller’s tip speed, which in turn reduces the amount of energy imparted to the pumped fluid. As a result, the pump’s flow rate and pressure both decrease. A smaller or trimmed impeller can thus be used efficiently in applications in which the current impeller is producing excessive head. In addition to reduced energy demand, impeller trimming improves system stability, reduces cavitation and eliminates excessive vibration and noise.

Development Status Products
Commercial

Impeller TrimmingCosts & Benefits

Parent Process: Cross Cutting Technology
Energy Savings Potential

By reducing the impeller diameter from 320 mm to 280 mm, energy savings between 25 to 30% have been realized in plants in the US and the UK.

CO2 Emission Reduction Potential
Costs

Maintenance costs were reduced by impeller trimming.

Impeller Trimming Publications

Energy Efficiency Improvement and Cost Saving Opportunities for the U.S. Iron and Steel Industry

The U.S. Environmental Protection Agency’s (EPA) energy guide, Energy Efficiency Improvement and Cost Saving Opportunities for the U.S. Iron and Steel Industry, discusses energy efficiency practices and technologies that can be implemented in iron and steel manufacturing plants. This guide provides current real world examples of iron and steel plants saving energy and reducing cost and carbon dioxide emissions.

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