BOOK IN SERIES
∆
=
Units of the valve coefficient is [(units of flow rate)/(units of pressure) -0.5 ]
.
Hydraulic Nonlinear Resistances in Series:
Figure 1.10 shows three hydraulic valves in series. Equations 1.10A, 1.10B and 1.10C show how to
calculate the Equivalent Valve Coefficient for valves in series C ves .
The calculation is based on the following two facts:
The flow through the valves in series is the same.
The total differential pressure equals the sum of the differential pressures across each valve
in series.
∆ = ∆ + ∆ + ∆ = . + +
=
=
∆
+ + ×
∆
=
∑
.
.
.
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Fig. 1.10 - Nonlinear Hydraulic Resistances in Series