Counter Balance Valve
Check valve and relief valve connected in parallel
The Counter Balance Valve component is a check valve and a relief valve connected in parallel, which can be piloted internally, externally, or both internally and externally.
When pressure at port A is greater than the pressure at port B, the check valve orifice area is assumed to be a piecewise linear function of the pressure difference between port A and port B.
When pressure at port B is greater than the pressure at port A, the relief valve orifice area is assumed to be a piecewise linear function and will be affected by the pilot mode selected.
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 and Use volume B, when true, add optional volumes VA and VB to ports A and B, respectively. See Port Volumes for details.
If two orfices or valves are connected, enabling a volume at the common port reduces the the stiffness of the system and improves the solvability.
Pressure across component
Pressure drop from A to B
Flow rate through component
Flow rate from port A to port B
Internal flow sensor
Internal pressure difference sensor
Upstream hydraulic port
Downstream hydraulic port
Hydraulic port for external pilot
Reynolds number at critical flow
Check Valve Settings Parameters
Pressure at which valve is fully closed (A=Aclose)
Pressure at which valve is fully open (A=Aopen)
Valve area when fully open
Valve area when closed (leakage)
Pressure Ratios Parameters
Relief Settings Parameters
Pressure at which valve is fully closed (A = Aclose)
Pressure at which valve is fully open (A = Aopen)
Valve Dynamics Parameters
When true (checked) a first-order dynamics is used for the valve area
Use volume A
When true a hydraulic volume chamber is added to portA
Volume of chamber A
Use volume B
When true a hydraulic volume chamber is added to portB
Volume of chamber B
For more information see Port Volumes.
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