Shuttle Valve

Shuttle valve with pressure bias Description The Shuttle Valve component allows flow out of port C from the either port A or port B, depending which has the higher pressure. Based on the orifice area, the pressure vs. flow rate relationship is calculated by the formulation used in the Orifice component. The boolean parameters Use volume A, Use volume B, and Use volume C, when true, add optional volumes ${V}_{A}$, ${V}_{B}$, and ${V}_{C}$ to ports A, B, and C, respectively.

Connections

 Name Description Modelica ID $\mathrm{portA}$ Hydraulic port of left inlet portA $\mathrm{portB}$ Hydraulic port of right inlet portB $\mathrm{portC}$ Hydraulic port of bottom outlet portC

Parameters

General Parameters

 Name Default Units Description Modelica ID ${p}_{\mathrm{open}}$ $1·{10}^{4}$ $\mathrm{Pa}$ Pressure difference to make one side fully open popen ${A}_{\mathrm{close}}$ $1·{10}^{-12}$ ${m}^{2}$ Orifice area when closed (leakage) Aclose ${A}_{\mathrm{open}}$ $1·{10}^{-5}$ ${m}^{2}$ Orifice area when fully open Aopen $\mathrm{Exact}$ $\mathrm{false}$ When true (checked) a first-order dynamics is used for the valve areas Exact ${t}_{c}$ $\frac{1}{10}$ $s$ Time constant tc ${C}_{d}$ $\frac{7}{10}$ Flow-discharge coefficient Cd ${\mathrm{\Re }}_{\mathrm{Cr}}$ $12$ Reynolds number at critical flow ReCr

Volumes Parameters

 Name Default Units Description Modelica ID Use volume A $\mathrm{false}$ When true a hydraulic volume chamber is added to portA useVolumeA $\mathrm{Va}$ $1·{10}^{-6}$ ${m}^{3}$ Volume of chamber A Va Use volume B $\mathrm{false}$ When true a hydraulic volume chamber is added to portB useVolumeB $\mathrm{Vb}$ $1·{10}^{-6}$ ${m}^{3}$ Volume of chamber B Vb Use volume C $\mathrm{false}$ When true a hydraulic volume chamber is added to portC useVolumeC $\mathrm{Vc}$ $1·{10}^{-6}$ ${m}^{3}$ Volume of chamber C Vc