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Navigation: Library > Iconic Diagrams > Hydraulics > Valves > checkvalve-states |
  
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Iconic Diagrams\Hydraulics\Valves
Domains: Continuous. Size: 1-D. Kind: Iconic Diagrams (Hydraulics).
This model describes a spring-loaded check valve with parasitic volumes. The resistance depends on the pressure difference:
dp < pclosed => valve closed, only leakage: pa.phi = pb.phi = dp * GLeak
pclosed < dp < popen => working range, i. e. valve partially opened
popen < dp => valve wide open: pa.phi = pb.phi = K * sqrt(dp - pclosed);
Ports |
Description |
pa, pb |
Both terminals of the hydraulic component. |
Causality |
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preferred pressure out pa preferred pressure out pb |
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Parameters |
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CheckValve\pclosed CheckValve\popen CheckValve\Q_nom |
Valve is closed under this pressure [Pa]. Valve is fully open above this pressure [Pa]. Turbulent flow at nominal pressure drop [m3/s]. |
CheckValve\Q_leak |
Leakage flow at nominal pressure drop, make 1e-12 if unknown [m3/s] |
CheckValve\p_nom Va\V Va\p_initial Vb\V Vb\p_initial |
Nominal pressure [Pa] Volume of oil under pressure [m3] (hidden) The starting pressure of the volume [Pa] (hidden) Volume of oil under pressure [m3] (hidden) The starting pressure of the volume [Pa] (hidden) |