What makes semi-axial flow impellers different from axial flow impellers?
What is a main disadvantage of a centrifugal pump?
In a pump curve, head, power consumption, efficiency and NPSH are shown as a function of…
What does ‘NPSH’ stand for in the NPSH-curve?
What does QH curve show?
Test results
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Q: What makes semi-axial flow impellers different from axial flow impellers?
A: Semi-axial flow impellers deliver higher rotation speeds
Q: What makes semi-axial flow impellers different from axial flow impellers?
A: They subject the fluid to a degree of radial flow
Q: What makes semi-axial flow impellers different from axial flow impellers?
A: They’re not nearly as good as a fully axial flow impeller
Q: What is a main disadvantage of a centrifugal pump?
A: They require a lot of maintenance
Q: What is a main disadvantage of a centrifugal pump?
A: They contain a lot of moving parts
Q: What is a main disadvantage of a centrifugal pump?
A: They cannot create suction by themselves
Q: In a pump curve, head, power consumption, efficiency and NPSH are shown as a function of…
A: Performance
Q: In a pump curve, head, power consumption, efficiency and NPSH are shown as a function of…
A: The type of pump
Q: In a pump curve, head, power consumption, efficiency and NPSH are shown as a function of…
A: Flow
Q: How much of the world’s total volume of water is fresh water?
A: 72%
Q: How much of the world’s total volume of water is fresh water?
A: About 50%
Q: How much of the world’s total volume of water is fresh water?
A: 3.5%
Q: Are axial flow impellers used in closed pump designs?
A: Yes
Q: Are axial flow impellers used in closed pump designs?
A: Sometimes
Q: Are axial flow impellers used in closed pump designs?
A: No
Q: How many main pump types dose Grundfos produce?
A: 3
Q: How many main pump types dose Grundfos produce?
A: 10
Q: How many main pump types dose Grundfos produce?
A: 12
Q: What does ‘NPSH’ stand for in the NPSH-curve?
A: Net potential surface heat
Q: What does ‘NPSH’ stand for in the NPSH-curve?
A: Net peripheral suction height
Q: What does ‘NPSH’ stand for in the NPSH-curve?
A: Net positive suction head
Q: What does QH curve show?
A: Flow at a given head
Q: What does QH curve show?
A: Head at a given flow
Q: What does QH curve show?
A: Overall efficiency