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Information on the
• The released operating media and limitations of operation for your safety valve are
hydraulic fluid
contained in "Data sheet 25880".
• Bosch Rexroth offers the suitable seal designs for the hydraulic fluid used.
Bleeding the
hydraulic system
1.
Leak test
Check whether during operation hydraulic fluid leaks at the safety valve and at the
connections.
9 Operation
Incorrect area of application!
The approval according to Pressure Equipment Directive and thus the safe pressure
relief function are no longer applicable if the safety valve is used incorrectly or
outside its area of application.
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▶
▶
If errors occur, refer to chapter 14 "Troubleshooting".
Observe the operating instructions of the system into which the valve is installed.
Switch the valve several times under operating pressure before placing it into full
operation. This will expel any remaining air from the valve. Mechanical damage
due to inadmissibly high acceleration of the hydraulic fluid and the control spool
is thus avoided and the valve's life cycle is increased.
You can also achieve the switching movement of the valve spool necessary for the
bleeding procedure by manually actuating the manual override. For further
information, see chapter 9.4 "Operating the optional manual override at the
directional valve".
Do not use the safety valve as high-response valve!
Possible unloading via the directional valve must not be applied for safety-
relevant functions!
If unloading is required for safety-relevant functions, an additional unloading
valve must be installed.
For information on the operation, please refer to the operating instructions for
the hydraulic system into which the safety valve is installed.
WARNING
RE 25880-B/10.18, DBA...1X/...E, Bosch Rexroth AG
Operation
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