This is the first lesson in the Centrifugal Pump Repair Course. This lesson introduces the components and operating principles of a typical centrifugal pump. Normal operating conditions for the pump are described and guidelines for troubleshooting excessive leakage are provided.

Module Objectives

• Identify and describe the sealing surfaces on a centrifugal pump.
• Explain the purpose and conditions under which packing would be used.
• Explain the purpose of the lantern ring.
• Explain the purpose and conditions under which a mechanical seal would be used.
• Explain how to determine whether centrifugal pump leakage is excessive.
• Recognize causes and symptoms of excessive leakage.