22
In addition to the load sensing function the LP-controller offers maximum pressure limitation. Once the system pressure reaches
the set pressure of the pressure cut-off valve, the LS-controller is overridden and the pump swashes back, whilst maintaining the
system’s regulating pressure. The hydraulic pump remains in this state until the system pressure falls below the set pressure. The
hydraulic pump then returns to normal LS operation.
Possible maximum pressure control setting ranges
>> 125 - 230 bar
>> 231 - 350 bar
>> 351 - 420 bar
Controllers. LP. Load Sensing with hydraulic pressure cut-off
LP-characteristic curve
The maximum pressure cut-off valve prevents prolonged operation of pressure relief valves installed in the hydraulic system for
protection. This has the following benefits for the hydraulic system:
>> Operating pressure is maintained
>> No operation in the overload range
>> Any operating point under the power
curve remains accessible
>> Demand-oriented volume flow generation
>> Minimum power loss
>> Reduced heat and noise generation
>> Longer service life of the pump and the
entire hydraulic system
>> Improved energy consumption of the overall system
LP. LS with hydraulic pressure cut-off
LP-controller
Q
max
p
max
2
∆p
1 Flow
2 Pressure
Maximum performance range of the pump
Actual power demand of the system
Regulating ∆p
Pressure cut-off characteristic
1
To Next Page
Loading...