What characterises a flat curve?
In their simplest forms, what do pump curves measure?
What happens to the flow when the NPSH value increases?
What do you have when there’s a cross point between the system’s characteristics and the pump’s performance?
Why will pumps with a constant duty point soon be a thing of the past?
Test results
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Q: What characterises a flat curve?
A: When there are small changes in head resulting in large changes in flow
Q: What characterises a flat curve?
A: When there are large changes in head resulting in large changes in flow
Q: What characterises a flat curve?
A: When there are small changes in head resulting in small changes in flow
Q: In their simplest forms, what do pump curves measure?
A: Pressure and flow
Q: In their simplest forms, what do pump curves measure?
A: Flow and head
Q: In their simplest forms, what do pump curves measure?
A: Flow and pressure
Q: What happens to the flow when the NPSH value increases?
A: It decreases
Q: What happens to the flow when the NPSH value increases?
A: It remains the same
Q: What happens to the flow when the NPSH value increases?
A: It increases as well
Q: What do you have when there’s a cross point between the system’s characteristics and the pump’s performance?
A: The specific duty point
Q: What do you have when there’s a cross point between the system’s characteristics and the pump’s performance?
A: The desired flow rate
Q: What do you have when there’s a cross point between the system’s characteristics and the pump’s performance?
A: The total head
Q: Why will pumps with a constant duty point soon be a thing of the past?
A: Because duty pumps no longer operate alone
Q: Why will pumps with a constant duty point soon be a thing of the past?
A: Because better and smarter control valves are available
Q: Why will pumps with a constant duty point soon be a thing of the past?
A: Beause of the use of variable speed pumps for applications with variable demand
Q: What does a P2-curve measure?
A: The relation between the power supplied and the power used
Q: What does a P2-curve measure?
A: The relation between a pump’s power consumption and flow
Q: What does a P2-curve measure?
A: The pump’s head