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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 Cves.
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.
∆ = ∆ + ∆ + ∆ = . + + .
∆ ∆
= = .
+ + ×
= .
∑
81
Fig. 1.10 - Nonlinear Hydraulic Resistances in Series
| Global MDA Journal | NOV-DEC 2017
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