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다음의 내용은 http://www.pumpworld.com에서
인용하였습니다.
Centrifugal Pumps are classified into three general
categories:
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CENTRIFUGAL PUMPS
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RADIAL FLOW
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MIXED FLOW
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AXIAL FLOW
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- Radial Flow: a centrifugal pump in which the pressure
is developed wholly by centrifugal force.
- Mixed Flow: a centrifugal pump in which the pressure
is developed partly by centrifugal force and partly by the
lift of the vanes of the impeller on the liquid.
- Axial Flow: a centrifugal pump in which the pressure
is developed by the propelling or lifting action of the
vanes of the impeller on the liquid.
- Pressure and Liquid Height Relationship (Head)
1 PSI = 2.31 Ft of Water
- Pressure, Liquid Height and Specific Gravity Relationship
Pressure(PSI) = Head(FT) x Specific Gravity(SG)
/ 2.31
- Example - Water - 231Ft x
1.0 / 2.31 = 100 PSI
- Example - HCL - 231 Ft x 1.2
/ 2.31 = 120 PSI
- Example - Gas - 231 Ft x .80
/ 2.31 = 80 PSI
- Centrifugal Pump Components: The two main components
of a centrifugal pump are the impeller and the volute. The
impeller produces liquid velocity and the volute forces
the liquid to discharge from the pump converting velocity
to pressure. This is accomplished by offsetting the impeller
in the volute and by maintaining a close clearance between
the impeller and the volute at the cut-water. Please note
the impeller rotation. A centrifugal pump impeller slings
the liquid out of the volute. It does not cup the liquid.
- Capacity: Centrifugal Pump is a variable displacement
pump. The actual flow rate achieved is directly dependent
on the Total Dynamic Head it must work against. The flow
capacity of a centrifugal pump also depends on three (3)
other factors:
- Pump Design
- Impeller Diameter
- Pump Speed
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