Lp. Ls With Hydraulic Pressure Cut-Off - Linde HPR-2 Manual

Controllers. LP. Load Sensing with hydraulic pressure cut-off
02 03 04
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.

LP. LS with hydraulic pressure cut-off

P1
P
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
02 03 04
>> Any operating point under the power
curve remains accessible
>> Demand-oriented volume flow generation
LP-characteristic curve
2
p
max
1 Flow
2 Pressure
Maximum performance range of the pump
Actual power demand of the system
Regulating ∆p
Pressure cut-off characteristic
22
05 06
LP
D1
P X T
0 max
T U L
05 06
∆p
1
Q
max
07 08 09
LS2
LS1
X
Projekt-Name:
Projekt-Titel:
Dokument-Name:
Dokument-Titel:
Projekt-Ersteller:
>> Minimum power loss
Dokument-Ersteller:
Erstellt am :
Zuletzt gespeichert:
>> Reduced heat and noise generation
07 08 09
>> Longer service life of the pump and the
entire hydraulic system
>> Improved energy consumption of the overall system
LP-controller
Possible maximum pressure control setting ranges
>>
125 - 230 bar
>> 231 - 350 bar
>> 351 - 420 bar
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01
02
03
04
05
06
07
HPR-02-A2-LP00_Schaltplan_Katalog_v01
Schaltplan_LP
08
RA3 - P. Schlee
RA3 - P.Schlee
16.03.2012 13:30:12
16.03.2012 14:57:47
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