Component Marking - Bosch rexroth DBD 1X/ E Series Operating Instructions Manual

20/56 Product information
Bosch Rexroth AG, DBD...1X/..E, RE 25402-B/10.21
5.2

Component marking

Type-examination tested safety valves bear a coded component marking. The
component marking always comprises the identical elements, the meaning of which
is shown in the following example:
Table 7: Example of component marking
TÜV. SV. __- 390.
Last digit of the year of the last extension of the validity of the component
marking
Safety valve
Mark of the notified body which has carried out the type-examination procedure
1) See also "Data sheet 25402 and/or 25710, Characteristic curves: Type-examination tested safety valves"
5.2.1 Limitations of use
The safety valves may only be operated within certain operating limits. The maximum
admissible flow in l/min or the discharge coefficient is always the last but one figure
of the component marking attached to the safety valve.
Table 8: Limitations of use
Valve size
NG4
NG4
NG6, 10, 20, 30
4.5. F. 30. 500
Maximum admissible flow in l/min without
counter pressure in the discharge line
discharge coefficient
Fluid
Smallest flow diameter in front of the valve seat in mm
Number of the component marking assigned by VdTÜV
Response pressure p
A
60...315
320...500
see characteristic curves and
component marking
Set response pressure in bar
in bar maximum flow q
Vmax
10
17
see characteristic curves and
component marking
1) or
in l/min