PressureReducingValve
Library
Components/Valves/PressureValves
Description
The component PressureReducingValve is a model of a 2-port pressure control valve. It maintains a largely constant outlet pressure even at a variable (higher) inlet pressure.
If inlet pressure pA is less than Set pressure (relative value) the valve acts like an orifice with the characteristics Nominal volume flow and Nominal pressure difference.
For all pressures exceeding Set pressure (relative value) the valve opens and the flow increases linearly following the slope given by parameters Nominal volume flow and Pressure drop. The outlet pressure deviates by Deviation P-A @ Nominal volume flow.
The component PressureReducingValve is not a model of a pressure control valve according to its physical structure. It merely represents the characteristic behavior of a pressure reducing valve. Therefore dynamic effects such as forces due to inertia will not be represented.
Parameters
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_SetPressure | SetPressure | Set pressure (relative value) | Scalar | |
mo_Deviation | Deviation | Deviation | Scalar | |
mo_gain | gain | Controller gain | Scalar | |
mo_NominalVolumeFlow | NominalVolumeFlow | Nominal volume flow | Scalar | |
mo_NominalPressureDifference | NominalPressureDifference | Nominal pressure difference | Scalar | |
mo_ReferenceDensity | ReferenceDensity | Reference density for volume flow and pressure difference | Scalar | |
mo_timeConst | timeConst | Response time of valve spool | Scalar | |
mo_deadVolume | deadVolume | Dead volume at ports | Scalar |
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_forwardFluidProperties | forwardFluidProperties | Forward fluid properties between ports | Scalar | true |
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_volumeFlowA | volumeFlowA | volumeFlowA | Structure | |
mo_volumeFlowA/fixed | fixed | Cell of scalars | true | |
mo_volumeFlowA/start | start | Cell of scalars | ||
mo_volumeFlowB | volumeFlowB | volumeFlowB | Structure | |
mo_volumeFlowB/fixed | fixed | Cell of scalars | true | |
mo_volumeFlowB/start | start | Cell of scalars | ||
mo_pA | pA | pA | Structure | |
mo_pA/fixed | fixed | Cell of scalars | true | |
mo_pA/start | start | Cell of scalars | ||
mo_pB | pB | pB | Structure | |
mo_pB/fixed | fixed | Cell of scalars | true | |
mo_pB/start | start | Cell of scalars | ||
mo_relX | relX | relX | Structure | |
mo_relX/fixed | fixed | Cell of scalars | true | |
mo_relX/start | start | Cell of scalars |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
fluidPortA | implicit | Hydraulic port A | input | 1 |
fluidPortB | implicit | Hydraulic port B | input | 2 |