Page 64 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer

Be st Practice 2 .4 Pump Best Practices
Integral gear centrifugal This pump design is commonly used when flow and head
requirements make it necessary to yield low values of NPSH
This type of pump is used for low flow applications requiring required. When designing piping systems for this type of pump,
high head. Refer to Figure 2.4.4. The pump case design is care must be taken to ensure equal flow distribution to each end
similar to the inline, but incorporates pump bearings and an of the impeller to prevent cavitation and vibration.
integral gear to increase impeller speeds over 30,000 RPM.
Multistage horizontal split
Single stage double flow between bearing
When the hydraulic limits of a single stage pump are exceeded,
As the name implies, double suction impellers are mounted on it is common practice to use a multistage pump, shown in
between-bearing rotors, as shown in Figure 2.4.5. Figure 2.4.6.

Fig 2.4.5 Single stage double flow between bearing (Courtesy of Union Pump Co.)

Fig 2.4.6 Multistage centrifugal pump (Courtesy of Union Pump Co.)

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