Page 120 - Centrifugal Pumps Design and Application

NPSH 101

Figure 8-19. Estimating K 2.

Example

Ignoring internal leakage back to the impeller, calculate NPSHR
cavitation free for the pump now described.

• Capacity—1,800 GPM
• Product—Water
• Temperature—70° F
• Speed—8,100 RPM
• Impeller eye area—17.2 sq in.
• Eye diameter—5 in.
• Inlet blade angle—15°
• Suction area at A-B—24 sq in.