Table of Contents
Advertisement
18/40
Product information
Bosch Rexroth AG, DB20K.1X/...E, RE 25818-B/11.21
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.
__-
1001.
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 25818, characteristic curves: Type-examination tested safety valves"
5.2.1 Limitations of use
The safety valves may only be operated within certain limitations of use. The
maximum admissible flow in l/min is always the last but one figure of the component
marking attached to the safety valve.
In the plant, the response pressure specified in the component marking is set at a
flow of 2 l/min.
The maximum admissible flow stated in the component marking applies for:
- pilot oil return external "Y" without counter pressure in the pilot oil return line:
Admissible counter pressure in the discharge line (port T) < 10 bar.
Table 8: Limitations of use
Response pressure p
30...60
61...110
111...210
211...315
316...350
14,4.
F.
G.
Maximum admissible flow in l/min without
counter pressure in the discharge line
Fluid
Smallest flow diameter in front of the valve seat in mm
Number of the component marking assigned by VdTÜV
in bar
maximum flow q
A
70
100
150
200
300
p
Set response pressure in bar
in l/min
Vmax
1)
Advertisement
Table of Contents
