Question 1 of 6
Basic

What characterises a flat curve?

Question 2 of 6
Basic

When selecting a pump for variable flow, what's imperative?

Question 3 of 6
Basic

What happens to the flow when the NPSH value increases?

Question 4 of 6
Basic

Why will pumps with a constant duty point soon be a thing of the past?

Question 5 of 6
Basic

In their simplest forms, what do pump curves measure?

Question 6 of 6
Basic

What do you have when there’s a cross point between the system’s characteristics and the pump’s performance?

Question 6 of 6
Basic

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1: What characterises a flat curve?
When there are small changes in head resulting in large changes in flow
1: What characterises a flat curve?
When there are large changes in head resulting in large changes in flow
You can find the answer here >
1: What characterises a flat curve?
When there are small changes in head resulting in small changes in flow
You can find the answer here >
2: When selecting a pump for variable flow, what's imperative?
Looking for pumps which offer the best efficiency at lower more frequent flow
2: When selecting a pump for variable flow, what's imperative?
Selecting a pump with the best efficiency at the peak flow
You can find the answer here >
2: When selecting a pump for variable flow, what's imperative?
Looking for a pump with a constant duty point
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3: What happens to the flow when the NPSH value increases?
It decreases
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3: What happens to the flow when the NPSH value increases?
It remains the same
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3: What happens to the flow when the NPSH value increases?
It increases as well
4: Why will pumps with a constant duty point soon be a thing of the past?
Because duty pumps no longer operate alone
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4: Why will pumps with a constant duty point soon be a thing of the past?
Because better and smarter control valves are available
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4: Why will pumps with a constant duty point soon be a thing of the past?
Because of the use of variable speed pumps for applications with variable demand
5: In their simplest forms, what do pump curves measure?
Pressure and flow
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5: In their simplest forms, what do pump curves measure?
Flow and head
5: In their simplest forms, what do pump curves measure?
Flow and pressure
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6: What do you have when there’s a cross point between the system’s characteristics and the pump’s performance?
The specific duty point
6: What do you have when there’s a cross point between the system’s characteristics and the pump’s performance?
The desired flow rate
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6: What do you have when there’s a cross point between the system’s characteristics and the pump’s performance?
The total head
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