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Pressure Relief Valve
Poppet Type, Direct-Acting
Metric Cartridge – 400 bar
DB12120A-CE
+ TÜV Type Approved
Up to 110 l/min
Up to 400 bar
The pressure relief valve DB12120A-CE is a
direct-acting, spring-loaded poppet valve with
CE mark and TÜV SV.
Its function is to relieve pressure in the
system. The spring exerts a force on the
poppet and presses it on the valve seat. If
the hydraulic pressure is below the pre-set
spring tension, the valve is closed. Only
if the hydraulic force exceeds the pre-set
spring tension does the valve open and ow
is diverted to tank via port 2. To ensure that
stable operation is maintained, the poppet
is securely located in the damping piston
which produces a damping force, opposing
the direction of movement, and this has a
stabilizing effect.
Caution:
The valve DB12120A-CE is classied as a
safety valve according to PED. Always follow
the operating instructions supplied with the
valve!
The key points are stated below:
– Tank pressure (port 2) must be
p
2 max
= 0 bar!
– If the connections are incorrect, the safety
function of the valve is disabled!
– The pressure setting must not be altered!
– The valve must not be tampered with!
FEATURES
z CE valve according to Pressure Equipment Directive (PED) 97/23/EC
z Excellent stability throughout the entire ow range
z Low hysteresis and accurate pressure control
z External surfaces zinc-plated
z Hardened and ground valve components to ensure minimal wear and extended
service life
z Low pressure drop by CFD optimized ow path
z Various pressure ranges up to 400 bar
z TÜV type approved
FUNCTION
SPECIFICATIONS
Operating pressure: max. 400 bar
max. 0 bar at port 2 (tank)
Nominal ow: max. 110 l/min (depending on the
pressure range - see ow curves)
Pressure setting ranges: 10 to 150 bar
20 to 250 bar
30 to 350 bar
40 to 400 bar
Leakage: Leakage-free
(max. 5 drops
≙ 0,25 cm³/min at 350 bar)
Media operating temperature range: min. -20 °C to max. +80 °C
Ambient temperature range: min. -20 °C to max. +80 °C
Operating uid: Hydraulic oil to DIN 51524 Part 1 and 2
Viscosity range: min. 7.4 mm²/s to max. 420 mm²/s
Filtration: Class 21/19/16 according to ISO 4406 or
cleaner
MTTF
d
: 150 years (see "Conditions and
instructions for valves" in brochure 5.300)
Installation: No orientation restrictions
Materials: Valve body: high tensile steel
Piston: hardened and
ground steel
Seals: FKM (standard)
Back-up rings: PTFE
Cavity: 12120A
Weight: 0.42 kg
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MODEL CODE
DB12120A – 01 1 – CExxxx.ENISO4126.6L. xxx. xxx
Basic model
Pressure relief valve
Type
Series
(determined by manufacturer)
Type approval code
xxx stands for the identication number of the notied body
and CE to EN ISO 4126
Max. permitted ow rate
065 = 65 l/min
Rate depends on the pressure range
(see performance curves)
Opening pressure setting
030 = 30 bar, opening pressure in bar, factory-set
(See Application Range chart)
TYPE APPROVAL CODE
TÜV.SV.XX-981.6.F. XXX. XXX
Type approval code
Year of type approval test
Flow rate (l/min)
Opening pressure setting, bar
Standard models
Model code Part No.
DB12120A-011-CExxxx.ENISO4126.6L.065.030 3109740
DB12120A-011-CExxxx.ENISO4126.6L.095.100 3108618
DB12120A-011-CExxxx.ENISO4126.6L.110.150 3108621
DB12120A-011-CExxxx.ENISO4126.6L.110.200 3108625
DB12120A-011-CExxxx.ENISO4126.6L.110.250 3108629
DB12120A-011-CExxxx.ENISO4126.6L.110.300 3108632
DB12120A-011-CExxxx.ENISO4126.6L.110.350 3087728
DB12120A-011-CExxxx.ENISO4126.6L.110.400 3108636
Standard in-line bodies
Code Part No. Material Ports Pressure
R12120A-01X-01 396489 Steel, zinc-plated G 3/4 420 bar
Other line bodies on request
Seal kits
Code Material Part No.
SEAL KIT DB12120A-01X-...V FKM 557399
DOCUMENTATION
Each valve is supplied with an Operating Manual in accordance with
the Pressure Equipment Directive.
PERFORMANCE
Pressure range ... 150 bar
Pressure range ... 350 bar
Flow rate [l/min]
Flow rate [l/min]
Flow rate [l/min]
Flow rate [l/min]
Pressure drop [bar]Pressure drop [bar]Pressure drop [bar]Pressure drop [bar]
Pressure range ... 400 bar
Pressure range ... 250 bar
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DIMENSIONS
CAVITY
12120A
hex. SW 32
torque 50
+10
Nm
Millimeter
Subject to technical modications
Form tools
Tool Part No.
Countersink 173958
Reamer 174874
Tap 1002625
APPLICATION RANGE
Flow rate Q [l/min]
Operating pressure p [bar]
permitted
range
Millimeter
Subject to technical modications
tting depth
HYDAC Fluidtechnik GmbH
Justus-von-Liebig-Str.
D-66280 Sulzbach/Saar
Tel: 0 68 97 /509-01
Fax: 0 68 97 /509-598
E-Mail: utec@hydac.com
NOTE
The information in this brochure relates to the
operating conditions and applications described.
For applications or operating conditions not
described, please contact the relevant technical
department.
Subject to technical modications.
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