🔍 Key Concepts

• Look carefully at how liquid enters the impeller eye from the connected pipe/flange on the casing. • Review the common centrifugal pump suction arrangements: end suction (axial), side/bottom/top suction (radial into the casing). • Note the relationship between the pump shaft centerline and the direction of flow at the suction nozzle.

💭 Think About

• From which direction does the fluid approach the impeller: straight along the shaft axis, or from a radial opening in the casing? • Is the suction flange located at the very end of the pump casing or on the side, top, or bottom of the volute body? • If you follow the centerline of the suction pipe in the drawing, does it line up with the shaft or intersect it from the side?

✅ Before You Answer

• Verify whether the suction pipe/flange is in line with the shaft axis or perpendicular to it. • Confirm that the suction opening leads directly into the impeller eye without turning inside the casing. • Make sure you are classifying the suction connection (where fluid enters) and not the discharge connection.