🔍 Key Concepts

• Flow path in a centrifugal pump from eye of the impeller to discharge nozzle • Location of the impeller eye relative to the suction and discharge flanges • Difference between the suction nozzle (fluid entering) and discharge nozzle (fluid leaving) on an end-suction pump

💭 Think About

• Trace the path the liquid would take starting at the lowest-pressure point near the center of the impeller and moving outward—where must it enter the pump casing? • On this sectional view, which flange leads straight into the center (eye) of the impeller, and which flange is positioned where the fluid exits the volute and turns toward the outlet? • Compare the orientation of the horizontal and vertical nozzles: which one lines up directly with the impeller eye?

✅ Before You Answer

• Identify the impeller and especially the eye of the impeller first before looking at any letters. • Confirm which labeled connection is directly in line with the impeller eye—that one will be the suction side. • Make sure the connection you choose is where fluid ENTERS the casing, not where it is directed away from the impeller into the volute and out the discharge.