Page 415 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer

Be st Practice 7 .13 Lube, Seal and Control Oil System Best Practices

Fig 7.13.2 Reduce it to an equivalent orifice

Sub-systems part of various sub-systems also helps in understanding the total
function of auxiliary systems.
Both positive displacement and dynamic pumps alone do not
contain the desired characteristics for operation within an aux- Equivalent vessel
iliary system. These components must be combined in a con-
trolled sub-system to achieve the desired results. The sub- Refer to Figure 7.13.3. Systems and sub-systems can be reduced
system is the combination of the pump and its control valve, to equivalent vessels. As an example, the supply pipe from
which together produce the required flow characteristic. a lube oil console can be reduced to an equivalent vessel as
Viewing components in control and instrumentation as being shown in Figure 7.13.3.

Fig 7.13.3 Reduce it to an equivalent vessel

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