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[ << nomally open >> << normally closed >> << dsabled>> ]
Output No.
[ 1,06 ] 0
11.2.4 DU1 auto-change-over per zone
The principle behind the operation of the
DU1 corresponds to that of a hydraulically
controlled 4/2 directional control valve. The
DU1 supplies an amount of lubricant fed by
the pump into one of the two main lines,
while the other main line is connected to the
return flow connection of the pump.
Once the change-over pressure is reached,
the DU1 switches a valve piston against the
DU1’s internal spring force. The pressure
in the pre-pressurized main line is then re-
lieved towards the pump reservoir.
The lubricant in the main line can be re-
leased. At the same time, a change-over
is performed to pressurize the previously
relieved main line.
Application-specific nomenclature
EOL End of the main line
Reversing valve Hydraulic reversing valve
Proximity sensor For stroke monitoring
Instructions
Pressure-controlled change-over valve DU1,
Document No. 951-171-011-EN
EN
100
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