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DBD
| Pressure relief valve
Bosch Rexroth AG
, RE 25710, edition: 2016-07
Designation
Component marking
Maximum flow
q
V max
in l/min
Set
response overpressure
p
in bar
DBDS 4 K1X/
E
DBDH 4 K1X/
E
TÜV.SV.- -1038.4.F.G.p
10
60 … 315
17
320 … 500
Ordering code:
Type-examination tested safety valves type DBD
1)
Type-examination tested safety valves
The functionality of these valves corresponds to that of the
standard series (see page 3). Valves of type
DBD..1X/..E are, however, type-examination tested
pressure relief valves according to the Pressure Equipment
Directive 2014/68/EU and intended for use as safety
valves.
At the factory, the response pressure is set to a fixed
maximum value using the adjustment type. Afterwards, the
safety valve is sealed.
The safety valves are available with graded response
pressures (in 5 bar steps). With valve versions equipped
with rotary knob or hand wheel, the valve spring can be
unloaded by the user and a response pressure lower than
the factory setting can be set without the need of
removing the lead seal.
Pressure in the type designation is to be entered by the
customer, pressure adjustment
≥
60 bar and possible in 5-bar
steps.
Information is entered at the factory
1)
Component series 1X according to the Pressure Equipment
Directive 2014/68/EU
1)
Component series 1X, according to Pressure Equipment Directive
2014/68/EU (For applications outside these parameters, please
consult us!)
hydraulic
Set response pressure
bar See last figure of the component marking above
Maximum counter pressure in the discharge line
bar See characteristic curves on page 9 and 10
Maximum flow
l/min The last but one figure of the component marking attached at
the safety valve is always binding, see above. For valve types
which have a variable maximum flow depending on the response
pressure, the discharge coefficient is specified at this place (see
also page 10)
Hydraulic fluid
Hydraulic fluids according to DIN 51524:
Hydraulic oils HL and HLP are suitable for safety valves with
FKM seals.
Hydraulic fluid temperature range
°C –10 … +60
Viscosity range
mm
2
/s 12 … 230
Deviating technical data:
Type-examination tested safety valves type DBD
1)
general
Ambient temperature range
°C –10 … +60
