Basic Civil & Mechanical Engineering: UNIT IV: f. Pumps
Classification According to the number of stages
Centrifugal Pumps
A Single Stage Pump is one in which the total delivery head is developed by a single impeller.
Classification
According To THE NUMBER OF STAGES
1. SINGLE STAGE PUMP
A
Single Stage Pump is one in which the total delivery head is developed by a
single impeller. [Refer: Section 6]
2. MULTI-STAGE PUMP
A single impeller may not be capable of
producing the required total head efficiently. Therefore, two or more impellers
may be used in series and fitted on the same shaft. The arrangement is such
that the second impeller takes its suction from the discharge of the first
impeller. If all the impellers acting in series are in a single casing, the
pump is called a Multi-Stage Pump.
In
the multi-stage pump, the pressure of the liquid gradually increases as it
passes through successive stages of the impeller. A multi-stage pump has the
following two important functions:
•
To
produce a high pressure head: If a high pressure head is to be developed, the impellers
should be connected in series or on the same shaft.
• To discharge large quantity of liquid: If
large quantity of liquid is to be discharged, the pumps should be connected in
parallel. This gives cumulative discharge.
Basic Civil & Mechanical Engineering: UNIT IV: f. Pumps : Tag: : Centrifugal Pumps - Classification According to the number of stages
Basic Civil & Mechanical Engineering: UNIT IV: f. Pumps
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Basic Civil and Mechanical Engineering
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