Farmer 400
Fav 700
Fav 900
Power lift / EPC electrohydraulic power lift control
Control valve EHR 23 - LS
A
General
Fav 900 chassis number 23/3001 and up
19.04.2001
8610 000011
A
a
2/2
Capitel Docu-No.
Index
Date Version
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Control valve EHR 23 - LS
Description of control valve (hydr. circuit diagram)
Text-module
The control EHR valve 23 - LS is divided into three sections:
Text-module
Section (1) is a 3-way pressure governor for:
neutral operation
and load compensation (3-way flow controller in "Lift" direction).
Load compensation means: The proportional magnet (A) deflects the valve slide (2). The slide
deflection is a measure of the flow rate. If the load-sensing pressure (LS pressure) now rises, the
variable-displacement pump PR is deflected further, and the working pressure increases.
The 3-way pressure governor (1) maintains the valve's flow rate at a constant level, irrespective of the
working pressure.
Text-module
Section (2) is a 3/2 proportional directional control valve:
for controlling the "Lift" function.
Text-module
Section (3) is a proportional throttle valve in the form of a control valve:
for controlling the "Lower" function.
Text-module
Non-return valve (4):
disconnects the Lift and Lower valve.
Text-module
Secondary pressure-relief valve (5):
to protect the consumer against overload (max. pressure = 230 +19 bar).
Text-module
Shuttle valve (6):
to pick up the respective maximum load-sensing pressure of the consumers and to transmit it to the
LS terminal plate.
Text-module
Technical specifications of control valve EHR - 23 - LS
Note:
EPC control valve for Fav 700 and Fav 900 with control-pressure bore for electrohydraulic
control valve.
EPC control valve for Farmer 400 without control-pressure bore for electrohydraulic control
valve.
Technical specifications EPC C
Rated flow 80 l/min
Max. permissible pressure, ducts
Y and P
250 bar
Max. permissible pressure, duct R 30 bar, though less than load-sensing pressure
Control principle Load-sensing (LS pressure)
Voltage 12 VDC
Actuation system Electromagnetically controlled
Set pressure 230 +19 bar
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