DGUV Information 209-071e - Safe maintenance of hydraulic systems (DGUV Informat...

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Abschnitt 4.6, 4.6 Valve blocks
Abschnitt 4.6
Safe maintenance of hydraulic systems (DGUV Information 209-071)
Titel: Safe maintenance of hydraulic systems (DGUV Information 209-071)
Normgeber: Bund
Amtliche Abkürzung: DGUV Information 209-071
Gliederungs-Nr.: [keine Angabe]
Normtyp: Satzung

Abschnitt 4.6 – 4.6 Valve blocks

In order to prevent confusions, the individual connections of the valves or stacking assemblies of valve blocks have to be numbered or marked before being disassembled (see figure 20).

Valves must be installed and demounted exerting the utmost care and cleanliness only. During the installation, the O-ring sealing elements within valve stacking assemblies have to be checked for proper seat. Defective seal elements must be replaced immediately.

All technical data (including wiring symbols and settings) of replacement valves have to comply with the provisions of the manufacturer or with the data of the type to be replaced.

The valves/valve blocks have to be assembled observing the order of the stacking assembly. In doing so, the installation position specified by the manufacturer has to be observed. The selected attachment screws have to comply with the dimensions and strength classes specified in the valve data sheet. The screws have to be tightened evenly and exactly to the torque specified in the valve data sheet as well.


Fig. 20
Marking hydraulic valve blocks

When replacing faulty switching solenoids on valves, the required voltages and performance details have to be observed.

Solenoids for 24 Volts operation do not execute the switching function when operated with 12 Volts, for example.

When installing replacement valves of other manufacturers, the electric pin assignments of the connection plugs have to be observed. These can be found in the related valve data sheet.