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Webinar Recordings

Pump Close Tolerance Fits

  • September 2024
  • Number of views: 1785
FREE for Members of EASA
Webinar recording

This presentation focusses on critical close fit tolerances and certain surface finish specifications.

Axial Thrust in Rotodynamic (Centrifugal) Pumps

  • February 2024
  • Number of views: 2555
FREE for Members of EASA
Webinar recording

When repairing centrifugal and axial flow pumps, axial thrust is a concern. An understanding of the causes and the mitigating provisions of various pump designs will help repair technicians to ensure those provisions work properly.

Common Causes of Surface Damage in Pump Impellers

  • March 2023
  • Number of views: 6316
Article

It’s common to find pump impellers with significant surface damage. The three most common causes of surface damage are erosion, corrosion and cavitation. For each of these there are characteristics which will help indicate the primary cause of the damage.

Causas Comunes del Daño en la Superficie de los Impulsores de las Bombas

  • March 2023
  • Number of views: 5825
Article

Es común encontrar impulsores de bombas con daños significativos en la superficie. Las tres causas más comunes de daño superficial son la erosión, la corrosión y la cavitación. La apariencia del daño en las superficies del impulsor refleja las características de cada uno de estos tres fenómenos.

Repairing Corrosion and Erosion Damage on Pumps

  • May 2022
  • Number of views: 5706
Article

Corrosion and/or erosion damage is inevitable for some pump applications. Pumps received for repair with significant damage may look like a candidate for the junk bin, but with proper repair techniques can often be restored to original performance – or perhaps better than original.

Reparando Daños por Corrosión y Erosión en Bombas

  • May 2022
  • Number of views: 4805
Article

En algunas aplicaciones, los daños por corrosión y/o erosión de las bombas son inevitables. Las bombas enviadas para reparación que presentan daños significativos pueden parecer buenas candidatas para ser desechadas, pero a menudo con las técnicas de reparación adecuadas pueden restaurarse a sus condiciones originales o quizás a unas mejores.

Dynamic Balancing on Pump Impellers

  • February 2021
  • Number of views: 14341
Article

As with most other machines commonly repaired in EASA service centers, dynamic balancing on pump impellers is an important concern. Excessive imbalance imparts forces on bearings, reducing their lives and subjecting machine mountings to vibratory energy that deteriorates foundations.

Balanceo Dinámico de los Impulsores de las Bombas

  • February 2021
  • Number of views: 12965
Article

Al igual que con la mayoría de las otras máquinas reparadas comúnmente en los centros de servicio de EASA, el balanceo dinámico de los impulsores de las bombas es una cuestión importante. El desbalanceo excesivo imparte fuerzas sobre los rodamientos, reduciendo su vida útil y sometiendo los soportes de las máquinas a una energía vibratoria que deteriora las fundaciones.

Determining Impeller Trim Diameters for Pump Re-Applications

  • June 2020
  • Number of views: 8741
FREE for Members of EASA
Convention presentation

Whether it is a simple re-application of a pump from 50 Hz to 60 Hz (or vice versa), the repurposing of an existing pump, or the application of a new pump to an existing application, determining the proper trim for an impeller can be challenging.

Why Pumps Fail

  • June 2020
  • Number of views: 12327
FREE for Members of EASA
Convention presentation

Centrifugal pump failures are most commonly attributed to seal failure, impeller damage and bearing failures. A good understanding of failure modes for seals, impellers and bearings is essential to providing customers with reliable pump repairs.