PressureReducingValve

    PressureReducingValve

Library

HydraulicsByFluidon/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

PressureReducingValve_0

NameLabelDescriptionData TypeValid 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

PressureReducingValve_1

NameLabelDescriptionData TypeValid Values

mo_forwardFluidProperties

forwardFluidProperties

Forward fluid properties between ports

Scalar

true
false

PressureReducingValve_2

NameLabelDescriptionData TypeValid Values

mo_volumeFlowA

volumeFlowA

volumeFlowA

Structure

mo_volumeFlowA/fixed

fixed

Cell of scalars

true
false

mo_volumeFlowA/start

start

Cell of scalars

mo_volumeFlowB

volumeFlowB

volumeFlowB

Structure

mo_volumeFlowB/fixed

fixed

Cell of scalars

true
false

mo_volumeFlowB/start

start

Cell of scalars

mo_pA

pA

pA

Structure

mo_pA/fixed

fixed

Cell of scalars

true
false

mo_pA/start

start

Cell of scalars

mo_pB

pB

pB

Structure

mo_pB/fixed

fixed

Cell of scalars

true
false

mo_pB/start

start

Cell of scalars

mo_relX

relX

relX

Structure

mo_relX/fixed

fixed

Cell of scalars

true
false

mo_relX/start

start

Cell of scalars

Ports

NameTypeDescriptionIO TypeNumber

fluidPortA

implicit

Hydraulic port A

input

1

fluidPortB

implicit

Hydraulic port B

input

2