What would be the result of throttling the...

Question 1 / 270705eccef9bbacbc34ba4d454d2

Question 1 of 270705eccef9bbacbc34ba4d454d2

What would be the result of throttling the suction valve to the point where the flow was less than that recommended by a centrifugal pump? The designed total net head would be reduced. The pump would begin to cavitate.

Back

Question 1 of 27070

🔍 Key Concepts

• Effect of throttling a suction valve vs a discharge valve on a centrifugal pump • Relationship between flow rate and total dynamic (net) head on a pump performance curve • Conditions that promote cavitation: NPSH available vs NPSH required

💭 Think About

• Think about what happens inside a centrifugal pump if you restrict the flow on the suction side: does pressure at the eye of the impeller increase or decrease? • Look at a typical centrifugal pump curve: when you move to a lower flow rate, what normally happens to the developed head? • Ask yourself: does cavitation usually get worse when you starve the pump of suction pressure, or when you throttle on the discharge side?

✅ Before You Answer

• Confirm whether throttling on the suction side increases or reduces the NPSH available (Net Positive Suction Head). • Check from a standard pump characteristic curve how head changes as flow decreases at constant speed. • Verify whether cavitation is more likely when suction pressure is low and flow into the impeller eye is restricted.

Question 1 of 27070

I only

II only

Both I and II

Neither I nor II

Question 1 / 270705eccef9bbacbc34ba4d454d2

Question 1 of 270705eccef9bbacbc34ba4d454d2

Back

Question 1 of 27070