2-WAY SLIP-IN
PRESSURE RELIEF
CARTRIDGE VALVES
DBV, DBM, DBE SERIES
ISO 7368 SIZES 16 TO 50
'-08015*.*;&% %&4*(/ '03 01&3"5*/(
13&4463&4 0' 61 50  #"3  14*
3FW $ .BSDI 
www.axxeron-hydrolux.com
2
2-way Slip-in Pressure Relief Cartridge Valves
Whenever the highest levels of motion control
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our expertise at work. Through collaboration, creativity
and world-class technological solutions, we help you
overcome your toughest engineering obstacles. Enhance
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This catalog is for users with technical knowledge. To ensure all the necessary characteristics for the functionality and safety of the system,
the user has to check the suitability of the products described herein. The products described herein are subject to change without notice.
In case of doubt, please contact AXXERON HYDROLUX.
For the full disclaimer the most current information refer to www.axxeron-hydrolux.com.
INTRODUCTION
INTRODUCTION ..........................................................................2
Product Overview ..............................................................3
Description of Operation ...............................................4
TECHNICAL DATA .....................................................................9
DBV, DBE, DBM ..................................................................9
Characteristic Curves .......................................................10
Dimensions ............................................................................ 13
Pressure Relief Sandwich Valve ................................17
Pressure Relief Valve .....................................................19
Accessories ...........................................................................21
Spare Parts ..........................................................................22
ORDERING INFORMATION ....................................................23
General Ordering Information ......................................23
DBV - Standard Pressure Relief Valve, Pilot
Operated ................................................................................24
DBV - Pressure Relief Valve with 2 Pressure
Settings ..................................................................................26
DBV - Pressure Relief Valve with 3 Pressure
Settings
..................................................................................27
DBM - Pressure Relief Valve with Unloading
Function ..................................................................................28
DBM - Pressure Relief Valve, Bypassed / Soft
Unloading when Solenoid is De-energized .............30
DBM - Pressure Relief Valve, Unloading Function,
2 Pressure Settings..........................................................31
DBE - Pressure Relief Valve, Proportionally
Operated ................................................................................32
Ordering Code DBV, DBM, DBE ..................................33
Ordering Code DBD, ZDBD ...........................................35
Rev. C, March 2025
3
2-way Slip-in Pressure Relief Cartridge Valves
Pilot-operated 2-way slip-in pressure relief cartridge
valves are used to protect hydraulic systems against
excessively high pressures, and/or for setting and limiting
a given system pressure in hydraulic systems. These
valves are designed for use in hydraulic manifolds. With a
compact design, this product series offers a high power
density for high performance hydraulic systems.
The valves featured in this catalog are designed for
420 bar (6,000 psi) operation. They are available in sizes
16 to 50 according to ISO 7368.
All configurations shown in this catalog, as well as
additional options, can also be generated by using
individual cartridges, cartridge covers and pilot valves
from the respective catalogs and ordering those
components individually. For pressure relief valve sizes
between 63 and 100 please also refer to the individual
catalogs.
The 2–way slip-in pressure relief valves are classified into
three separate functions:
• DBV: Standard pressure relief valve with single or
multiple pressure settings
• DBM: Pressure relief valve with an electrically
operated unloading function, optionally with soft
unloading function.
• DBE: Pressure relief valve with an electric proportional
pressure relief valve.
PRODUCT OVERVIEW
INTRODUCTION
Y
B
CX
A
Y
AP
AP
PBTA
BA
T
a
P
X
C
B
A
2-Way Pressure Relief Valve -
Type DBV
2-Way Pressure Relief Valve
with Unloading Function -
Type DBM
Features and Benefits
Features Benefits
Flow optimized design that reduces pressure drops,
especially for unloading functions
Compact manifold design and minimal energy
Consumption which reduces operating costs
Rated pressure of up to 420 bar (6,000 psi) Highest load capability even in extreme environments
Highly reliable and durable design High degree of system availability
Optimized design of valve seat and shaft seal Leakage free valve seat and stable pressure control
performance
For soft unloading of the relief cartridge valve, an MC1
directional valve is used in combination with a pressure
relief pilot valve.
The integrated flow control function of the MC1
directional valve enables a very soft, pressure
independent opening without any loss of closing speed of
the cartridge valve.
Y
MX MZ2
AP
PBT
TP
A
XZ2Z1
B
C
A
2-way Pressure Relief Valve,
with Proportional Setting -
Type DBE
2-way Pressure Relief Valve
with Soft Unloading Function -
Type DBM
X
Y
A
B
P
T
b
A
B
P
A
B
T
Rev. C, March 2025
4
2-way Slip-in Pressure Relief Cartridge Valves
DESCRIPTION OF OPERATION
Operating Principle for Pressure Relief Function
2-Way Slip-in Pressure Relief Valves are vital components
of any hydraulic system, and are used to limit the maximum
permissible hydraulic pressure where necessary.
Typical applications include limiting pump and cylinder
pressures. The limiting of cylinder pressures not only
protects the cylinder from damage, but also enables the
reliable limitation of the force applied by the cylinder.
The pressure to be limited is applied to port A (8), and is
also routed simultaneously to port C (3) of the cover (2)
and the pilot valve (1) via a pilot line (10) equipped with
a suitable metering orifice. When the pressure in port A
exceeds the pressure setting of the pilot valve, then the
poppet (7) opens against the spring force (4) and pressure
in C. This process limits a further pressure increase in A.
The available poppets AO and EX have no or only a small
control surface at Port B, respectively (see picture below).
This leaves two primary control surfaces, surface A
working to open the valve, and surface C together with the
spring force working to close the valve (see page 8).
By combining the cover and pilot valve, both manual and
electrical proportional pressure settings can be realized
with or without unloading functionality. In order to get the
most out of these functions, it is
important to understand
the basic operating principles
of a pressure cartridge and
cover.
For pressure reducing and compensating functions we
offer the DMO series of 2-way Slip-in Cartridge Valves
with spool design. Please refer to the respective catalog
for more information.
2-Way Slip-in Pressure Relief Cartridge Valve
2
1
3
10
4
6
7
5
X
C
Y
B
A
9
8
1. Pilot valve, pressure
relief
2. Cover
3. Damping orifice
4. Spring
5. Sleeve and cap
6. B port
7. Poppet
8. A port
9. Manifold
10. X port with metering
orifice
INTRODUCTION
Control Area Ratio
A
C
=A
C
=
C
B
A
A
A
=A
A
=
A
B
=A
B
=
EXAO
1.07
1
11
0.070
Rev. C, March 2025
5
2-way Slip-in Pressure Relief Cartridge Valves
The DBV is a pressure relief valve where the opening
(relief) pressure is set via a screw-in pilot valve located in
the cover of the DBV.
If two or three different opening pressures are needed
within the same DBV, additional sandwich plates with
screw-in pilot valves can be used. A directional pilot valve
then switches between the different pressure settings
found in each sandwich plate.
For standard applications, a directional spool type valve
can be used (0B0, 1B0 or 2B0 pilot function). Applications
that require a leak free valve can make use of a seat type
valve (5B0 or 6B0 pilot function).
The directional pilot valve, if used, also determines the
maximum pressure rating for the DBV:
• 420 bar operating pressure is available for the DBV
with no directional pilot valve (only one screw-in
pilot valve / pressure setting), or DBV with 3/2-way
directional seat type pilot valves.
• 350 bar operating pressure for DBV with directional
spool type pilot valves.
INTRODUCTION
DESCRIPTION OF OPERATION
Type DBV - Standard Pressure Relief Valve
Y
B
CX
A
Y
AP
AP
PBTA
PBTA
BA
T
a
P
X
B
C
A
Y
AP
AP
PBTA
PBTA
TP
a
X
b
PBTA
BA
B
C
A
Pressure Relief Valve
Pressure Relief Valve with 2 Pressure Settings
Pressure Relief Valve with 3 Pressure Settings
Rev. C, March 2025
6
2-way Slip-in Pressure Relief Cartridge Valves
INTRODUCTION
Similar to the DBV, the DBM’s opening (relief) pressure is
determined by a screw-in pilot valve found in the cover of
the DBM.
The difference comes with the use of the directional valve
to realize an unloading function. A DBM uses one switching
position of the directional valve as an unloading function,
allowing the pressure in the system to be discharged.
For standard applications, a directional spool type valve
can be used for the unloading function (pilot function 0B0,
1B0 or 2B0). Applications that require a leak free valve
can make use of a seat type valve (pilot function 5B0 or
6B0).
As in type DBV, the directional pilot valve determines the
maximum pressure rating:
• 420 bar operating pressure is available for DBM’s with
3/2-way directional seat type pilot valves.
• 350 bar operating pressure for DBM’s with directional
spool type pilot valves.
Y
AP
AP
PBTA
BA
T
a
P
X
C
B
A
Y
AP
AP
PBTA
PBTA
X
TP
a
b
BA
B
C
A
DESCRIPTION OF OPERATION
Type DBM – 2-way Pressure Relief Valve with Unloading Function
Pressure Relief Valve with Unloading Function
Pressure Relief Valve with Unloading Function and
2 Pressure Settings
Rev. C, March 2025
7
2-way Slip-in Pressure Relief Cartridge Valves
INTRODUCTION
DBM - Pressure Relief Valve with Soft Unloading
Function
The soft unloading function can be realized with a
combination of an MC1 directional valve and a pressure
relief pilot valve.
The integrated flow control function of the MC1
directional valve enables a very soft, pressure independent
opening without any loss of closing speed of the cartridge
valve.
In general, the advantages of a soft unloading (opening)
function such as this one can be a benefit to any cartridge
valve application.
DBE – 2-way Pressure Relief Valve with Electric
Proportional Adjustment
The opening (relief) pressure of the DBE is controlled via
an electrical proportional pilot valve mounted on the cover
of the DBV. Due to pilot valve limitations, the maximum
operating pressure of the DBE is limited to 350 bar.
0 0
35
30
25
20
15
10
5
350
(5.076)
300
(4.351)
100
(1.450)
200
(2.901)
250
(3.626)
150
(2.176)
50
(725)
Time [s]
p [bar (psi)]
Voltage [V]
0 0.65
1
2
3
0.70.550.45 0.5 0.60.40.350.30.25
Y
MX MZ2
AP
PBT
TP
A
XZ2Z1
B
C
A
Y
AP
AP
PBTA
X
TP
B
C
A
DESCRIPTION OF OPERATION
Pressure Relief Valve with
Soft Unloading Function
Pressure Relief Valve,
Proportionally Operated
Pressure Relief Valve with
Manual Maximum Pressure
Setting, Proportionally
Operated
Pressure Unloading A to B in Relation to Control Signal and Time
1. Control signal
2.
Unloading via orifice Ø 0.6 mm
3. Unloading via MC1 control valve
X
Y
A
B
P
T
b
A
B
P
A
B
T
Type DBM and DBE
Rev. C, March 2025
8
2-way Slip-in Pressure Relief Cartridge Valves
INTRODUCTION
Description of Operation AO and EX Poppet
Two different poppet types are available for the pressure
relief function: The AO and EX poppets.
AO Poppet (Without Shaft Seal)
The AO poppet is designed for conventional pressure
relief functions. Due to the fact that the poppet has no
control surface in port B, the control area ratio is
A
A
:A
C
= 1:1.
Please note: For an AO poppet it is important that the
pressure in port C does not significantly exceed the
pressure in port A, otherwise damage to the valve seat
may occur.
EX Poppet (With Shaft Seal)
The EX poppet, with its shaft seal and a control area ratio
of A
A
:A
C
= 1:1.07, is ideal for pressure relief applications
where it is necessary to seal off port C from port B. The
shaft seal (1) installed on the outer diameter of the poppet
creates a leak-free seal between the poppet and the
cartridge sleeve.
The excess area in the closing direction of the cartridge
valve guarantees a tight closing of the valve, when the
pressures in ports A and C are balanced. Due to this area
ratio, the pilot valve opens at a pressure that is 7 % lower
than the cartridge main stage.
When using a cartridge valve with a shaft seal, we
recommend using the strongest spring available to
ensure a secure closing of the valve against the friction
force of the shaft seal.
Control Area Ratios
Cartridge With AO Poppet
Pilot oil supply externally
through cover interface
Pilot oil supply internally
through orifice (2)
Pilot oil supply externally
through cover interface
Pilot oil supply internally
through orifice (2)
Cartridge With EX Poppet
A
C
=A
C
=
C
B
A
A
A
=A
A
=
A
B
=A
B
=
EXAO
1.071
11
0.070
2
AA
C
BB
AO/
KOB
AO/
K99
C
2
11
AA
C
BB
EX/
KOB
EX/
K99
C
1 Shaft seal
2 Threaded bore in poppet/
orifice
Optional Internal Pilot Oil Supply
A standard pressure relief valve receives the pilot
oil supply through the X port of the cover interface
(order code “X”, external).
Alternatively, an optional orifice (2) in the cartridge
poppet enables an internal pilot oil supply from port
A to port C (order code “S”, internal).
DESCRIPTION OF OPERATION
Poppet Function
Rev. C, March 2025
9
2-way Slip-in Pressure Relief Cartridge Valves
TECHNICAL DATA
Valve type 2-way Slip-in Cartridge Valve, Pressure Relief Function
Valve model DBV, DBE, DBM
Valve design Pilot-operated 2-way pressure relief valve
Mounting type Manifold mounting
Flow direction A ≥ B
Installation position Any
Mounting pattern Size 16 25 32 40 50
ISO 7368- 06-1-1-16 08-3-1-16 09-5-1-16 10-7-1-16 11-9-1-16
Storage temperature
range
Valve with NBR seals -30 to +80 °C (-22 to +176 °F)
Valve with FKM seals -20 to +80 °C (-4 to +176 °F)
Ambient temperature
range
Valve with NBR seals -30 to +80 °C (-22 to +176 °F)
Valve with FKM seals -20 to +80 °C (-4 to +176 °F)
MTTF
d
value according to EN ISO 13849-1 150 years
Hydraulic Data
Maximum operating pressure port A, B, X 350 bar (5,000 psi) or 420 bar (6,000 psi), depending on pilot valve
Maximum operating pressure port Y 350 bar
1)
Maximum
recommended flow
2)
Size 16 25 32 40 50
Flow 350 l/min
(93 gpm)
800 l/min
(212 gpm)
1,400 l/min
(370 gpm)
2,000 l/min
(529 gpm)
3,500 l/min
(926 gpm)
Seal material /
hydraulic fluid
combination
Valve with NBR seals • Mineral oil based hydraulic fluids
• HFB, HFC hydraulic fluids
Valve with FKM seals • Mineral oil based hydraulic fluids
• HFD hydraulic fluids
Temperature range of
hydraulic fluid
Valve with NBR seals -30 to +80 °C (-22 to +176 °F)
Valve with FKM seals -20 to +80 °C (-4 to +176 °F)
Recommended viscosity range 15 to 46 mm
2
/s (cSt)
Maximum permissible viscosity range 2.8 to 380 mm
2
/s (cSt)
Recommended
cleanliness class
according to ISO 4406
For functional safety 20/18/15
For longer service life 17/14/11
1)
Y port pressure will influence the opening pressure. It is recommended that the Y port be exposed to as little pressure
as possible, e.g. direct connection to leak oil (§0 bar). Pre-set pressure + Y port pressure = opening pressure
2)
Maximum flow depends on the particular pressure setting. See the corresponding characteristics curve for details.
DBV, DBE, DBM
General Technical Data
Rev. C, March 2025
10
2-way Slip-in Pressure Relief Cartridge Valves
TECHNICAL DATA
CHARACTERISTIC CURVES
The following diagrams demonstrate the pressure vs. flow
curves for different pressure relief valve sizes and poppet
types. The relief valves are available in five different
pressure ranges (B, E, G, K and L). For each pressure range,
the characteristic curves at different pressure settings
are shown.
To reach optimal pressure relief valve performance, the
curves should be as flat as possible. To achieve this, we
recommend using the lowest possible pressure range
available for the desired pressure setting.
Example: For a pressure setting of 50 bar, a relief valve of
pressure range B – 70 bar should be used and not one of
pressure range L – 420 bar.
Size 16 with AO Poppet
Pressures set at 2 l/min (0.53 gpm).
Size 16 with EX Poppet
Pressures set at 8 l/min (2.11 gpm).
AO Poppet (1:1) EX Poppet (1:1.07, leakage free)
Y
B
CX
A
YXC
1:1.07
B
A
420
(6.000)
385
(5.500)
350
(5.000)
315
(4.500)
280
(4.000)
245
(3.500)
140
(2.000)
105
(1.500)
175
(2.500)
210
(3.000)
70
(1.000)
35
(500)
0
Q [l/min (gpm)]
50
(13)
150
(40)
100
(26)
300
(79)
250
(66)
200
(53)
10 bar
35 bar
50 bar
70 bar
105 bar
140 bar
175 bar
210 bar
245 bar
280 bar
315 bar
350 bar
385 bar
420 bar
E – 175 bar
G – 245 bar
K – 350 bar
L – 420 bar
350
(92)
0
p [bar (psi)]
B – 70 bar
420
(6.000)
385
(5.500)
350
(5.000)
315
(4.500)
280
(4.000)
245
(3.500)
140
(2.000)
105
(1.500)
175
(2.500)
210
(3.000)
70
(1.000)
35
(500)
0
0
200
(53)
0
140 bar
Q [l/min (gpm)]
50
(13)
150
(40)
100
(26)
300
(79)
250
(66)
B – 70 bar
50 bar
70 bar
10 bar
35 bar
105 bar
175 bar
210 bar
245 bar
280 bar
315 bar
350 bar
385 bar
420 bar
E – 175 bar
G – 245 bar
K – 350 bar
L – 420 bar
350
(92)
p [bar (psi)]
Notes:
The dashed line corresponds to the maximum permissible flow for the respective size.
All curves measured with pressureless control oil return (Y). Any pressure at Y-port is additional to the pressure setting.
Oil temperature 45 °C (113 °F), oil viscosity 32 mm
2
/s (cSt).
The following schematics show the test setup for the
measurement of the characteristic curves:
11
2-way Slip-in Pressure Relief Cartridge Valves
TECHNICAL DATA
Size 25 with AO Poppet
Size 32 with AO Poppet
Size 25 with EX Poppet
Size 32 with EX Poppet
0
Q [l/min (gpm)]
100
(26)
300
(79)
500
(132)
400
(107)
200
(53)
B – 70 bar
10 bar
35 bar
50 bar
70 bar
105 bar
140 bar
175 bar
210 bar
245 bar
280 bar
315 bar
350 bar
385 bar
420 bar
E – 175 bar
G – 245 bar
K – 350 bar
L – 420 bar
800
(211)
700
(185)
600
(159)
0
p [bar (psi)]
420
(6.000)
385
(5.500)
350
(5.000)
315
(4.500)
280
(4.000)
245
(3.500)
140
(2.000)
105
(1.500)
175
(2.500)
210
(3.000)
70
(1.000)
35
(500)
0
Q [l/min (gpm)]
400
(107)
200
(53)
B – 70 bar
10 bar
35 bar
50 bar
70 bar
105 bar
140 bar
175 bar
210 bar
245 bar
280 bar
315 bar
350 bar
385 bar
420 bar
E – 175 bar
G – 245 bar
K – 350 bar
L – 420 bar
800
(211)
1,40
0
(370)
1,200
(317)
1,000
(264)
600
(159)
0
p [bar (psi)]
420
(6.000)
385
(5.500)
350
(5.000)
315
(4.500)
280
(4.000)
245
(3.500)
140
(2.000)
105
(1.500)
175
(2.500)
210
(3.000)
70
(1.000)
35
(500)
420
(6.000)
385
(5.500)
350
(5.000)
315
(4.500)
280
(4.000)
245
(3.500)
140
(2.000)
105
(1.500)
175
(2.500)
210
(3.000)
70
(1.000)
35
(500)
0
0
100
(26)
300
(79)
500
(132)
400
(107)
200
(53)
800
(211)
700
(185)
600
(159)
0
Q [l/min (gpm)]
B – 70 bar
E – 175 bar
G – 245 bar
K – 350 bar
L – 420 bar
p [bar (psi)]
140 bar
50 bar
70 bar
10 bar
35 bar
105 bar
175 bar
210 bar
245 bar
280 bar
315 bar
350 bar
385 bar
420 bar
0
0
420
(6.000)
385
(5.500)
350
(5.000)
315
(4.500)
280
(4.000)
245
(3.500)
140
(2.000)
105
(1.500)
175
(2.500)
210
(3.000)
70
(1.000)
35
(500)
0
Q [l/min (gpm)]
B – 70 bar
E – 175 bar
G – 245 bar
K – 350 bar
L – 420 bar
p [bar (psi)]
140 bar
50 bar
70 bar
10 bar
35 bar
105 bar
175 bar
245 bar
210 bar
280 bar
315 bar
350 bar
385 bar
420 bar
400
(107)
200
(53)
800
(211)
1,400
(370)
1,200
(317)
1,000
(264)
600
(159)
Pressures set at 2 l/min (0.53 gpm). Pressures set at 8 l/min (2.11 gpm).
Pressures set at 2 l/min (0.53 gpm). Pressures set at 8 l/min (2.11 gpm).
Notes:
The dashed line corresponds to the maximum permissible flow.
All curves measured with pressureless control oil return (Y). Any pressure at Y-port is additional to the pressure setting.
Oil temperature 45 °C (113 °F), oil viscosity 32 mm
2
/s (cSt).
CHARACTERISTIC CURVES
12
2-way Slip-in Pressure Relief Cartridge Valves
TECHNICAL DATA
Size 40 with AO Poppet
Size 50 with AO Poppet
Size 40 with EX Poppet
Size 50 with EX Poppet
B – 70 bar
0
Q [l/min (gpm)]
400
(107)
10 bar
35 bar
50 bar
70 bar
105 bar
140 bar
175 bar
210 bar
245 bar
280 bar
315 bar
350 bar
385 bar
420 bar
E – 175 bar
G – 245 bar
K – 350 bar
L – 420 bar
800
(211)
2,000
(528)
1,200
(317)
1,600
(423)
0
p [bar (psi)]
420
(6.000)
385
(5.500)
350
(5.000)
315
(4.500)
280
(4.000)
245
(3.500)
140
(2.000)
105
(1.500)
175
(2.500)
210
(3.000)
70
(1.000)
35
(500)
0
Q [l/min (gpm)]
500
(132)
10 bar
35 bar
50 bar
70 bar
105 bar
140 bar
175 bar
210 bar
245 bar
280 bar
315 bar
350 bar
385 bar
420 bar
E – 175 bar
G – 245 bar
K – 350 bar
L – 420 bar
1,000
(264)
3,500
(925)
1,500
(396)
2,500
(660)
3,000
(793)
2,000
(528)
0
p [bar (psi)]
420
(6.000)
385
(5.500)
350
(5.000)
315
(4.500)
280
(4.000)
245
(3.500)
140
(2.000)
105
(1.500)
175
(2.500)
210
(3.000)
70
(1.000)
35
(500)
B – 70 bar
420
(6.000)
385
(5.500)
350
(5.000)
315
(4.500)
280
(4.000)
245
(3.500)
140
(2.000)
105
(1.500)
175
(2.500)
210
(3.000)
70
(1.000)
35
(500)
0
0
Q [l/min (gpm)]
E – 175 bar
G – 245 bar
K – 350 bar
L – 420 bar
p [bar (psi)]
140 bar
50 bar
70 bar
10 bar
35 bar
105 bar
175 bar
245 bar
210 bar
280 bar
315 bar
350 bar
385 bar
420 bar
400
(107)
800
(211)
2,000
(528)
1,200
(317)
1,600
(423)
0
B – 70 bar
420
(6.000)
385
(5.500)
350
(5.000)
315
(4.500)
280
(4.000)
245
(3.500)
140
(2.000)
105
(1.500)
175
(2.500)
210
(3.000)
70
(1.000)
35
(500)
0
Q [l/min (gpm)]
B – 70 bar
E – 175 bar
G – 245 bar
K – 350 bar
L – 420 bar
p [bar (psi)]
140 bar
50 bar
70 bar
10 bar
35 bar
105 bar
175 bar
245 bar
210 bar
280 bar
315 bar
350 bar
385 bar
420 bar
500
(132)
1,000
(264)
3,500
(925)
1,500
(396)
2,500
(660)
3,000
(793)
2,000
(528)
0
Notes:
The dashed line corresponds to the maximum permissible flow.
All curves measured with pressureless control oil return (Y). Any pressure at Y-port is additional to the pressure setting.
Oil temperature 45 °C (113 °F), oil viscosity 32 mm
2
/s (cSt).
Pressures set at 2 l/min (0.53 gpm).
Pressures set at 2 l/min (0.53 gpm).
Pressures set at 8 l/min (2.11 gpm).
Pressures set at 8 l/min (2.11 gpm).
CHARACTERISTIC CURVES
13
2-way Slip-in Pressure Relief Cartridge Valves
TECHNICAL DATA
B B
AA
H1
L7
H2 = H1 +
88
(3.47)
L6
74.4
(2.93)
69
(2.72)
L3
L2
B2
L4
YX
MX (32/40/50)
DX (16/25)
MY (32/40/50)
DY (16/25)
L5
B1
L1
DIMENSIONS
NG16 NG25 NG32 NG40 NG50
B1 [mm (in)] 80 (3.15)
1)
85 (3.35) 102 (4.02) 125 (4.92) 140 (5.51)
B2 [mm (in)] 65 (2.56) 85 (3.35) 102 (4.02) 125 (4.92) 140 (5.51)
H1 [mm (in)] 35 (1.38) 40 (1.57) 45 (1.77) 60 (2.36) 60 (2.36)
H2 [mm (in)] 123 (4.84) 128 (5.04) 133 (5.24) 148 (5.83) 148 (5.83)
L1 [mm (in)] 17 (0.67) 13.5 (0.53) 16 (0.63) 20 (0.79) 20 (0.79)
L2 [mm (in)] 9.5 (0.37) 13.5 (0.53) 16 (0.63) 20 (0.79) 20 (0.79)
L3 [mm (in)] 1.5 (0.06) 1.5 (0.06) 1.5 (0.06) 1.5 (0.06) -
L4 [mm (in)] - 3.5 (0.14) 4.5 (0.18) 4.5 (0.18) 4.5 (0.18)
L5 [mm (in)] - - 4.5 (0.18) 4.5 (0.18) 4.5 (0.18)
L6 [mm (in)] - 12 (0.47) 20 (0.79) 25 (0.98) 25 (0.98)
L7 [mm (in)] - - 37.5 (1.48) 47 (1.85) 47 (1.85)
Plug MX/DX - G1/8“ (SW5) G1/4“ (SW6) G1/4“ (SW6) G1/4“ (SW6)
Plug MY/DY - - G1/4“ (SW6) G1/4“ (SW6) G1/4“ (SW6)
M
A
for MX, MY
[Nm (lbf ft)]
- 14 (0.55) 30 (1.18) 30 (1.18) 30 (1.18)
Weight [kg (lb)] 1.84 (4.06) 2.6 (5.73) 4.6 (10.14) 8.14 (17.95) 11 (24.25)
1)
Dimension B1 is larger than defined by ISO 7368.
Available Adjustments (see ordering code)
2: Adjustment for wrench size 13 mm AF
8: Adjustment 2 + cap + tamper proof seal (relief pressure
factory set)
9: Adjustment 2 + cap + tamper proof seal delivered
separately
Type DBV Sizes 16 to 50
14
2-way Slip-in Pressure Relief Cartridge Valves
TECHNICAL DATA
VALVE DIMENSIONS
Type DBM Sizes 16-32
NG16 NG25 NG32
B1 [mm (in)] 80 (3.15)
1)
85 (3.35) 102 (4.02)
B2 [mm (in)] 65 (2.56) 85 (3.35) 102 (4.02)
H1 [mm (in)] 35 (1.38) 40 (1.57) 45 (1.77)
H2 [mm (in)] 132 (5.20) 137 (5.39) 142 (5.59)
L1 [mm (in)] 17 (0.67) 13.5 (0.53) 16 (0.63)
L2 [mm (in)] 9.5 (0.37) 13.5 (0.53) 16 (0.63)
L3 [mm (in)] 1.5 (0.06) 1.5 (0.06) 1.5 (0.06)
L4 [mm (in)] 40 (1.57) 45 (1.77) 50 (1.97)
L5 [mm (in)] - - 3.5 (0.14)
L6 [mm (in)] 46 (1.81) 58 (2.28) 49 (1.93)
L7 [mm (in)] 63 (2.48) 75 (2.95) 66 (2.60)
L8 [mm (in)] 76 (2.99) 87 (3.43) 79 (3.11)
L9 [mm (in)] - - 27 (1.06)
L10 [mm (in)] - - 10.3 (0.41)
Weight [kg (lb)] 3.5 (7.72) 4.2 (9.26) 6.4 (14.11)
4/2-way Spool Type Valve Type 0B0 / 1B0
DBME_F6A0(EX)__X(S)__0(1)B0
Series F6: p
max
= 350 bar (5,000 psi)
3/2-way Seat Type Valve Type 5B0 / 6B0
DBME_K6A0(EX)__X(S)__5(6)B0
Series K6: p
max
= 420 bar (6,000 psi)
B
XY
A
B
A
L3L3
L2
L9
L7
H2`= H2 -
7.5
(0.30)
L4AP
B1
L1
L8
L6
H1
H2
L10
69
(2.72)
74.4
(2.93)
88
(3.46)
MX (32/40/50)
DX (16/25)
MY (32/40/50)
DY (16/25)
Available Adjustments (see ordering code)
2: Adjustment for wrench size 13 mm AF
8: Adjustment 2 + cap + tamper proof seal
(relief pressure factory set)
9: Adjustment 2 + cap + tamper proof seal
delivered separately
1)
Dimension B1 is larger than defined by ISO 7368.
Rev. C, March 2025
15
2-way Slip-in Pressure Relief Cartridge Valves
TECHNICAL DATA
VALVE DIMENSIONS
Type DBM Sizes 40-50
NG40 NG50
B1 [mm (in)] 125 (4.92) 140 (5.51)
B2 [mm (in)] 125 (4.92) 140 (5.51)
H1 [mm (in)] 60 (2.36) 60 (2.36)
H2 [mm (in)] 157 (6.18) 157 (6.18)
L1 [mm (in)] 20 (0.79) 20 (0.79)
L2 [mm (in)] 20 (0.79) 20 (0.79)
L3 [mm (in)] 1.5 (0.06) -
L4 [mm (in)] 65 (2.56) 65 (2.56)
L5 [mm (in)] 4.5 (0.18) 4.5 (0.18)
L6 [mm (in)] 38 (1.50) 30 (1.18)
L7 [mm (in)] 55 (2.17) 47 (1.85)
L8 [mm (in)] 67 (2.64) 60 (2.36)
L9 [mm (in)] 60 (2.36) 60 (2.36)
L10 [mm (in)] 10.5 (0.41) 10.5 (0.41)
Weight [kg (lb)] 9.7 (21.38) 13 (28.66)
4/2-way Spool Type Valve Type 0B0 / 1B0
DBME_F6A0(EX)__X(S)__0(1)B0
Series F6: p
max
= 350 bar (5,000 psi)
L4
B1
L8 L2
B2
L3
L1
B
MY
YX
H1
L7
A
74.8
(2.95)
69.3
(2.73)
88.5
(3.48)
H2
L5
L6
L9
L10
H1
L7
H2
L5
L6
MX (32/40/50)
DX (16/25)
MY (32/40/50)
DY (16/25)
AP
Available Adjustments (see ordering code)
2: Adjustment for wrench size 13 mm AF
8: Adjustment 2 + cap + tamper proof seal (relief pressure
factory set)
9: Adjustment 2 + cap + tamper proof seal delivered
separately
16
2-way Slip-in Pressure Relief Cartridge Valves
TECHNICAL DATA
NG40 NG50
B1 [mm (in)] 125 (4.92) 140 (5.51)
B2 [mm (in)] 125 (4.92) 140 (5.51)
H1 [mm (in)] 60 (2.36) 60 (2.36)
H2 [mm (in)] 157 (6.18) 157 (6.18)
L1 [mm (in)] 20 (0.79) 20 (0.79)
L2 [mm (in)] 20 (0.79) 20 (0.79)
L3 [mm (in)] 1,5 (xx) -
L4 [mm (in)] 65 (2.56) 65 (2.56)
L5 [mm (in)] 4.5 (0.18) 4.5 (0.18)
L6 [mm (in)] 38 (1.50) 30 (1.18)
L7 [mm (in)] 55 (2.17) 47 (1.85)
L8 [mm (in)] 67 (2.64) 60 (2.36)
L9 [mm (in)] 30 (1.18) 30 (1.18)
L10 [mm (in)] 10.5 (0.41) 10.5 (0.41)
Weight [kg (lb)] 9.7 (21.38) 13 (28.66)
3/2-way Seat Type Valve Type 5B0 / 6B0
DBME_K6A0(EX)__X(S)__5(6)B0
Series K6: p
max
= 420 bar (6,000 psi)
B2
L4
B1
L8 L2
L3
L1
B
A
YX
H1
L7
H2
L5
L6
74.8
(2.95)
69.3
(2.73)
88.5
(3.48)
L9
L10
MX (32/40/50)
DX (16/25)
MY (32/40/50)
DY (16/25)
AP
Available Adjustments (see ordering code)
2: Adjustment for wrench size 13 mm AF
8: Adjustment 2 + cap + tamper proof seal (relief pressure
factory set)
9: Adjustment 2 + cap + tamper proof seal delivered
separately
VALVE DIMENSIONS
Type DBM Sizes 40-50
17
2-way Slip-in Pressure Relief Cartridge Valves
TECHNICAL DATA
PRESSURE RELIEF SANDWICH VALVE
Type ZDBDP06 according to ISO 4401-03-02-0-05
Notes:
The dashed line corresponds to the maximum permissible flow.
All curves measured with pressureless control oil return (Y). Any pressure at Y-port is additional to the pressure setting.
Oil temperature 45 °C (113 °F), oil viscosity 32 mm
2
/s (cSt).
420
(6.000)
385
(5.500)
350
(5.000)
315
(4.500)
280
(4.000)
245
(3.500)
140
(2.000)
105
(1.500)
175
(2.500)
210
(3.000)
70
(1.000)
35
(500)
0
8
(53)
0
140 bar
Q [l/min (gpm)]
2
(0.53)
6
(40)
4
(26)
12
(79)
10
(66)
50 bar
70 bar
10 bar
35 bar
105 bar
175 bar
210 bar
245 bar
280 bar
315 bar
350 bar
385 bar
420 bar
E – 175 bar
B – 70 bar
G – 245 bar
K – 350 bar
L – 420 bar
p [bar (psi)]
Pressure set at 2 l/min (0.53 gpm).
Mode of Operation/Scope
Type ZDBDP06 pressure valves are directly controlled
pressure relief valves of a sandwich plate design.
The valve is designed to achieve a maximum operating
pressure of 420 bar (6,000 psi).
Characteristic Curves
18
2-way Slip-in Pressure Relief Cartridge Valves
TECHNICAL DATA
Relief Valve Adjustment over A-port (MA)
Relief Valve Adjustment over B-port (MB)
69.3
(2.73)
18.5
(0.73)
74.8
(2.95)
88
(3.47)
168
(6.61)
80
(3.15)
7
(0.28)
45
(1.77)
1.5
(0.06)
40
(1.58)
6.4
(0.25)
AB TP
AB TP
AB TP
AB TP
AB TP
AB TP
AB TP
AB TP
AB TP
AB TP
AB TP
AB TP
88
(3.47)
168
(6.61)
80
(3.15)
40
(1.58)
45
(1.77)
1.5
(0.06)
69.3
(2.73)
18.5
(0.73)
74.8
(2.95)
7
(0.28)
6.4
(0.25)
Available Adjustments (see ordering code)
2: Adjustment for wrench size 13 mm AF
8: Adjustment 2 + cap + tamper proof seal
(relief pressure factory set)
9: Adjustment 2 + cap + tamper proof seal
delivered separately
Available Schematics
Available Schematics
Available Adjustments (see ordering code)
2: Adjustment for wrench size 13 mm AF
8: Adjustment 2 + cap + tamper proof seal
(relief pressure factory set)
9: Adjustment 2 + cap + tamper proof seal
delivered separately
1)
For detailed information see datasheet Z_P06
PRESSURE RELIEF SANDWICH VALVE
Type ZDBDP06 according to ISO 4401-03-02-0-05
1)
19
2-way Slip-in Pressure Relief Cartridge Valves
TECHNICAL DATA
PRESSURE RELIEF VALVE
Type DBDP06 according to ISO 4401-03-02-0-05
1)
Mode of Operation/Scope
Type DBDP06 pressure valves are direct controlled
pressure relief valves with subplate mounting design.
Maximum operating pressure of 420 bar (6,000 PSI).
Characteristic Curves
See type ZDBDP06 sandwich plate valves.
Relief Valve Adjustment over A-port (MA)
Relief Valve Adjustment over B-port (MB)
45
(1.77)
38
(1.50)
11.4
(0.45)
1.3
(0.05)
45
(1.77)
88
(3.47)
163
(6.42)
75
(2.95)
69.4
(2.73)
74.8
(2.95)
18.5
(0.73)
7
(0.28)
AB TP
TP
AB TP
TP
7
(0.28)
38
(1.50)
45
(1.77)
11.4
(0.45)
1.3
(0.05)
45
(1.77)
88
(3.47)
163
(6.42)
75
(2.95)
69.4
(2.73)
74.8
(2.95)
18.5
(0.73)
Available Adjustments (see ordering code)
2: Adjustment for wrench size 13 mm AF
8: Adjustment 2 + cap + tamper proof seal
(relief pressure factory set)
9: Adjustment 2 + cap + tamper proof seal
delivered separately
Available Adjustments (see ordering code)
2: Adjustment for wrench size 13 mm AF
8: Adjustment 2 + cap + tamper proof seal
(relief pressure factory set)
9: Adjustment 2 + cap + tamper proof seal
delivered separately
For detailed information see datasheet Z_P06
Available Schematics
Available Schematics
20
2-way Slip-in Pressure Relief Cartridge Valves
TECHNICAL DATA
Solenoid Over B-port (MB)
41.75
(1.64)
51
(2.01)
max.
1.5
(0.06)
88
(3.46)
13
(0.51)
61
(2.40)
155
(6.10)
AB TP
TP
3 (0.79) [l/min (gpm)]
1 (0.26) [l/min (gpm)]
250
(3,626)
200
(2,901)
150
(2,176)
100
(1,450)
150
(725)
0
p [bar (psi)]
Command signal [A]
0 0,5 1,0 1,5 1,6
80
(1.160)
70
(1.015)
60
(870)
50
(725)
40
(580)
30
(435)
20
(290)
10
(145)
0
Pressure [bar (psi)]
Flow [l/min (gpm)]Rated Flow
1
(0.26)
2
(0.53)
3
(0.79)
4
(1.06)
100 bar
160 bar
350 bar
250 bar
5
(1.32)
0
Pressure Gain
Typical pressure vs. command signal response of
N-DBEP06H4007GA/MB valves
Test conditions: v= 32 mm
2
/s and t= 40° C
Pressure Override
Test conditions: v= 32 mm
2
/s and t= 40° C
PROPORTIONAL PRESSURE RELIEF VALVE
Type DBEP064007 according to ISO 4401-03-02-0-05
Mode of Operation/Scope
Type DBEP06 proportional pressure relief valves are
designed for limiting the pressure in a hydraulic system in
proportion to an applied electrical input.
These open-loop, single-stage valves can be used for direct
control of pressure in low flow systems (max. 3 l/min), or
for pilot control of larger pressure controls, and for such
applications as pressure-controlled pumps.
The valves are designed for a maximum operating pressure
of 350 bar (5,000 psi).
Available schematics
21
2-way Slip-in Pressure Relief Cartridge Valves
ACCESSORIES AND SPARE PARTS
ACCESSORIES
4FUDPOTJTUJOHPGUISFFU
PPMT
3
3FNPWB
M
M5PPM
T
TGP
S
S$BSUSJEHF
T
T$&&@,
Size
?45
16 to 50
XEB19547-001-00
4
4*;
&
& 4*;&
4
4  4*;&
4
4
Size Screw Hex key +==- Quantity Torque [Nm (lbf ft)] Order number
16
*40.Y
6 4 30 (22) X784-10818
25
*40.Y
10 4 100 (74) X784-11202
32
*40.Y
14 4 300 (221) X784-11601
40, 50
*40.Y
17 4 550 (406) X784-12002
.PVOUJO
H
H4DSFXT
22
2-way Slip-in Pressure Relief Cartridge Valves
ACCESSORIES AND SPARE PARTS
SPARE PARTS
Size Cartridge N-DB_E_AO
1)
Cartridge N-DB_E_EX
1)
16 X731-016_O_D000N00 X731-016_X_D000N00
25 X731-025_O_D000N00 X731-025_X_D000N00
32 X731-032_O_D000N00 X731-032_X_D000N00
40 X731-040_O_D000N00 X731-040_X_D000N00
50 X731-050_O_D000N00 X731-050_X_D000N00
Size Cover N-DB_E_/DBA
2)
Cover N-DB_E_/DBD
2)
Cover N-DBEE_/1WDB Cover N-DBME_/DBE
16 XEB19426D000N00 XEB19417D000N00 XEB18541D000N00 XEB19508D000N00
25 XEB19425D000N00 XEB19416D000N00 XEB18520D000N00 XEB19509D000N00
32 XEB19423D000N00 XEB19415D000N00 XEB18505D000N00 XEB19510D000N00
40 XEB19422D000N00 XEB19414D000N00 XEB18446D000N00 XEB19511D000N00
50 XEB19421D000N00 XEB19392D000N00 XEB18428D000N00 XEB19512D000N00
All specified seal sets are with NBR seals.
Further information on other spare parts can be found in the built-in valves catalog.
1)
Applies to valve types DBV, DBM and DBE
2)
Applies to valve types DBV and DBM
Seal Kits for Cartridge Main Stages
Seal Kits for Cartridge Covers
23
2-way Slip-in Pressure Relief Cartridge Valves
ORDERING INFORMATION
GENERAL ORDERING INFORMATION
To support the creation of ordering codes for certain
configurations of relief valves, the following pages show
excerpts of the ordering code for different variants. Those
excerpts show the configurations options that are unique
or limited for the particular configuration. General
options like size or pressure have been left blank, and
have to be taken from the complete ordering information
table at the end of the catalog.
For the DBV pressure relief function and the DBM
simple relief with unloading functions, the preferred
configurations including ordering codes are provided in
the tables.
DBV - Standard Pressure Relief Valve, Pilot Operated
DBV - Pressure Relief Valve with 2 Pressure Settings
DBV - Pressure Relief Valve with 3 Pressure Settings
DBM - Pressure Relief Valve with Unloading Function
DBM - Pressure Relief Valve Bypassed / Soft Unloading
when Solenoid is De-energized
DBM - Pressure Relief Valve with Unloading Function and 2
Pressure Settings
DBE - Pressure Relief Valve, Proportionally operated
24
2-way Slip-in Pressure Relief Cartridge Valves
Poppet Type AO
(no shaft seal on poppet)
Poppet Type EX
(with shaft seal on poppet)
Y
B
CX
A
YXC
1:1.07
B
A
1
9
5
12
-
DBV
KX–E
/
11
14a
14b
DBA
14c
14c
C
;;X.. C..
; EP..DBA
4FBMNBUFSJBM
1PQQFUUZQF
4J[F
7BMWFTQSJOHDBSUSJEHF
1SFTTVSFSBOHFPGSFMJFGQJMPUWBMWFJODPWFS
"E
KVTUNFOUPGSFMJFGWBMWFJODPWFS
i. e. X10 = orifice Ø 1,0 mm in X-port of the
cartridge cover
Option: Orifice configuration
Option: Cover type
Cover with integrated pressure
relief valve
Opon: Pressure seng (Adjustment 8 only)
e. g. EP350 = Relief pressure factory set
to 350 bar
• Valve function DBV
• Poppet type AO or EX
• Control cover type "DBA"
Note:
A type DBV pilot operated pressure relief valve can only be
leakage-free if the EX poppet is used
DBV - STANDARD PRESSURE RELIEF VALVE, PILOT OPERATED
Ordering Code Example (Complete Ordering Code in Section "Ordering Code")
ORDERING INFORMATION



B
25
2-way Slip-in Pressure Relief Cartridge Valves
ORDERING INFORMATION
Size
Pressure range
Configuration with AO poppet
(no shaft seal on poppet)
Configuration with EX poppet
(with shaft seal on poppet)
bar psi
16
70 1,000
/%#7&,"059#9$%#" /%#7&,&959#9$%#"
175 2,500
/%#7&,"069&9$%#" /%#7&,&969&9$%#"
245 3,500
/%#7&,"069(9$%#" /%#7&,&969(9$%#"
350 5,000
/%#7&,"069,9$%#" /%#7&,&969,9$%#"
  /%#7&,"069-9$%#" /%#7&,&969-9$%#"
25
70 1,000
/%#7&,"059#9$%#" /%#7&,&959#9$%#"
175 2,500
/%#7&,"069&9$%#" /%#7&,&969&9$%#"
245 3,500
/%#7&,"069(9$%#" /%#7&,&969(9$%#"
350 5,000
/%#7&,"069,9$%#" /%#7&,&969,9$%#"
  /%#7&,"069-9$%#" /%#7&,&969-9$%#"
32
70 1,000
/%#7&,"059#9$%#" /%#7&,&959#9$%#"
175 2,500
/%#7&,"069&9$%#" /%#7&,&969&9$%#"
245 3,500
/%#7&,"069(9$%#" /%#7&,&969(9$%#"
350 5,000
/%#7&,"069,9$%#" /%#7&,&659,9$%#"
  /%#7&,"069-9$%#" /%#7&,&969-9$%#"
40
70 1,000
/%#7&,"059#9$%#" /%#7&,&959#9$%#"
175 2,500
/%#7&,"069&9$%#" /%#7&,&969&9$%#"
245 3,500
/%#7&,"069(9$%#" /%#7&,&969(9$%#"
350 5,000
/%#7&,"069,9$%#" /%#7&,&9
69,9$%#"
  /%#7&,"069-9$%#" /%#7&,&969-9$%#"
50
70 1,000
/%#7&,"059#9$%#" /%#7&,&959#9$%#"
175 2,500
/%#7&,"069&9$%#" /%#7&,&969&9$%#"
245 3,500
/%#7&,"069(9$%#" /%#7&,&969(9$%#"
350 5,000
/%#7&,"069,9$%#" /%#7&,&969,9$%#"
  /%#7&,"069-9$%#" /%#7&,&969-9$%#"
Preferred Configurations Type
DBV - STANDARD PRESSURE RELIEF VALVE, PILOT OPERATED
Rev. C, March 2025
26
2-way Slip-in Pressure Relief Cartridge Valves
ORDERING INFORMATION
DBV - PRESSURE RELIEF VALVE WITH 2 PRESSURE SETTINGS
• Poppet type AO or EX
• Control cover type "DBD"
• Sandwich plate Type ZDBD_AT_/MA
• Pilot valve WE42P06 spool type 21
Note:
A pilot operated pressure relief valve type DBV can only be
leakage-free if the EX poppet is used in combination with
a seat valve.
To achieve a maximum operating pressure of 420 bar
(6,000 psi), the pilot valve must be configured as a seat
valve.
Pilot Function
“0B0“ and „1B0“
Pilot Function
„5B0“ and “6B0”
Y
AP
AP
PBTA
PBTA
BA
T
a
P
X
B
C
A
Y
AP
AP
PBTA
X
PBTA
A
T
a
P
C
1:1,07
B
A
1
5
12
11 12 13 14a 14e14c14b
/
;;;X..
A00; B00
C.. ; EP.. ZD...DBD
;
11
14e
14a
14b
DBD
14c
13
0B0
1B0
5B0
6B0
F
6
K
Seal material
?@@5D§DI@5
Size
&1<F5§C@B9>7§§»31BDB9475¼§
Pressure range of relief pilot valve in cover
Adjustment of relief valve in cover
Option: Pressure relief sandwich valves
e. g. X10 = orifice Ø 1,0 mm in X-port of the
cartridge cover
A00; B00 = A- and B-port in cover plugged
Option: Orifice configuration
Option: Cover type
Cover with integrated pressure relief
valve and pilot valve interface
Opon: Pressure seng (Adjustment 8 only)
e. g. EP350 = Relief pressure factory set
to 350 bar
Pilot Function
Pressure Relief low-pressure when
solenoid is de-energized
(4/2-Spool Type Pilot Valve)
Pressure Relief low-pressure when
solenoid is energized
(4/2-Spool Type Pilot Valve)
Pressure Relief low-pressure when
solenoid is de-energized
(3/2-Seat Type Pilot Valve)
Pressure Relief low-pressure when
solenoid is energized
(3/2-Seat Type Pilot Valve)
Series
Max. Operating Pressure 350 bar
(Pilot funtion 0B0 and 1B0)
Max. Operating Pressure 420 bar
(Pilot funtion 5B0 and 6B0)
e. g. ZDA9L = ZDBD sandwich valve
- Adjustment aligned to A-port
- Adjustment 9 (see point 11)
- Pressure range L (see point 12)
Ordering Code Example (Complete Ordering Code in Section "Ordering Code")
Rev. C, March 2025
-
DBV
XE

 

27
2-way Slip-in Pressure Relief Cartridge Valves
ORDERING INFORMATION
DBV - PRESSURE RELIEF VALVE WITH 3 PRESSURE SETTINGS
• Poppet type AO or EX
• Control cover type "DBD"
• Sandwich plate Type ZDBD_AT_/MA
• Sandwich plate Type ZDBD_BT_/MA
• Pilot valve WE43P06 piston type 03
Note:
A pilot operated pressure relief valve type DBV can only be
leakage-free if the EX poppet is used in combination with
a seat valve.
With a 4/3-way spool valve, there is still residual leakage
through the pilot valv
e.
Y
AP
AP
PBTA
PBTA
TP
a
X
b
PBTA
BA
B
C
A
Y
AP
AP
PBTA
PBTA
TP
a
X
b
PBTA
BA
C
1:1.07
B
A
1
5
12
11 12 13 14a 14c14b
/
;;;X..
A00; B00
C.. ; EP..DBD
; ZD...
14e
; ZD...
11
14e
14a
14b
DBD
14c
13
0B0
2B0
B-K
Seal material
?@@5D§DI@5§
Size
&1<F5§C@B9>7§§»31BDB9475¼
Pressure range of relief pilot valve in cover
Adjustment of relief valve in cover
Option: Pressure relief sandwich valves
e. g. X10 = orifice Ø 1,0 mm in X-port of the
cartridge cover
A00; B00 = A- and B-port in cover plugged
Option: Orifice configuration
Option: Cover type
Cover with integrated pressure relief
valve and pilot valve interface
Opon: Pressure seng (Adjustment 8 only)
e. g. EP350 = Relief pressure factory set
to 350 bar
Pilot Function
Pressure Relief low-pressure when
solenoid is de-energized
(4/3-Spool Type Pilot Valve)
Pressure Relief low-pressure when
A-port solenoid is energized
(4/3-Spool Type Pilot Valve) )
e. g. ZDA9K = ZDBD sandwich valve
- Adjustment aligned to A-port
- Adjustment 9 (see point 11)
- Pressure range K (see point 12)
e. g. ZDA2B = ZDBD sandwich valve
- Adjustment aligned to A-port
- Adjustment 2 (see point 11)
- Pressure range B (see point 12)
Up to 350 bar (5,000 psi)
Ordering Code Example (Complete Ordering Code in Section "Ordering Code")
Rev. C, March 2025
-
DBV
X
E


 
28
2-way Slip-in Pressure Relief Cartridge Valves
ORDERING INFORMATION
• Valve function DBM
• Poppet type AO or EX
• Control cover type "DBD"
• Spool type pilot valve WE42P06 spool “21” or seat
type pilot valve
Note:
A DBM type pilot operated pressure relief valve can only
be leakage-free if the EX poppet is used in combination
with a directional seat type pilot valve.
To achieve a maximum operating pressure of 420 bar
(6,000 psi), the pilot valve must be configured as a seat
valve. A combination of an AO poppet with a seat type
pilot valve (pilot function 5B0 and 6B0) is also possible.
Pilot function “0B0” Pilot function “1B0”
Pilot function „5B0“ Pilot function „6B0“
Y
AP
AP
PBTA
BA
T
a
P
X
C
B
A
Y
AP
AP
PBTA
A
T
a
P
X
C
1:1,07
B
A
Y
AP
AP
PBTA
BA
T
a
P
XC
B
A
Y
AP
AP
PBTA
A
T
a
P
X
C
1:1,07
B
A
1
9
5
12
14c14b
/
;;;P..A00 00.. ; EP..DBD
;C..
11
14a
14b
DBD
14c
13
0B0
1B0
5B0
6B0
F
6
K
Seal material
?@@5D§DI@5
Size
&1<F5§C@B9>7§§»31BDB9475¼
Pressure range of relief pilot valve in cover
Adjustment of relief valve in cover
e. g. A00 or B00 = A-port or B-port in cover
plugged (see schematic)
e.g. P10 = Orifice Ø 1.0 mm in P-port of the
cartridge cover
A00 = AP-connection in cover plugged
Option: Orifice configuration
Option: Cover type
Cover with integrated pressure relief
valve and pilot valve interface
Opon: Pressure seng (Adjustment 8 only)
e.g. EP350 = Relief pressure factory set
to 350 bar
Pilot Function
Pressure Relief bypassed when
solenoid is de-energized
(4/2-Spool Type Pilot Valve)
Pressure Relief bypassed when
solenoid is de-energized
(4/2-Spool Type Pilot Valve)
Pressure Relief bypassed when
solenoid is de-energized
(3/2-Seat Type Pilot Valve)
Pressure Relief bypassed when
solenoid is energized
(3/2-Seat Type Pilot Valve)
Series
Max. Operating Pressure 350 bar
(Pilot funtion 0B0 and 1B0)
Max. Operating Pressure 420 bar
(Pilot funtion 5B0 and 6B0)
DBM - PRESSURE RELIEF VALVE WITH UNLOADING FUNCTION
Ordering Code Example (Complete Ordering Code in Section "Ordering Code")
Rev. C, March 2025
-

XE


112131 14a
29
2-way Slip-in Pressure Relief Cartridge Valves
ORDERING INFORMATION
Size
Pressure range
Configuration with AO poppet
(no shaft seal on poppet)
Configuration with EX poppet
(with shaft seal on poppet)
bar psi
16
70 1,000
/%#.&'"059#@#1$%#%.:
On request
175 2,500
/%#.&'"069&@#1$%#%.:
245 3,500
/%#.&'"069(@#1$%#%.:
350 5,000
/%#.&'"069,@#1$%#%.:
40
 /%#.&,"069-@QJMPUGVODUJPO#PS#POMZ
25
70 1,000
/%#.&'"059#@#1$%#%.:
On request
175 2,500
/%#.&'"069&@#1$%#%.:
245 3,500
/%#.&'"069(@#1$%#%.:
350 5,000
/%#.&'"069,@#1$%#%.:
  /%#.&,"069-QJMPUGVODUJPO#PS#POMZ
32
70 1,000
/%#.&'"069#@#1$%#%.:
On request
175 2,500
/%#.&'"069&@#1$%#%.:
245 3,500
/%#.&'"069(@#1$%#%.:
350 5,000
/%#.&'"069,@#1$%#%.:
  /%#.&,"069-@QJMPUGVODUJPO#PS#POMZ
40
70 1,000
/%#.&'"059#@#1$%#%
On request
175 2,500
/%#.&'"069&@#1$%#%
245 3,500
/%#.&'"069(@#1$%#%
350 5,000
/%#.&'"069,@#1$%#%
  /%#.&,"069-@QJMPUGVODUJPO#PS#POMZ
50
70 1,000
/%#.&'"059#@#1$%#%
On request
175 2,500
/%#.&'"06
9&@#1$%#%
245 3,500
/%#.&'"069(@#1$%#%
350 5,000
/%#.&'"069,@#1$%#%
406,00
/%#.&,"069-@QJMPUGVODUJPO#PS#POMZ
DBM - PRESSURE RELIEF VALVE WITH UNLOADING FUNCTION
Preferred Configurations Type
Rev. C, March 2025
30
2-way Slip-in Pressure Relief Cartridge Valves
ORDERING INFORMATION
DBM - PRESSURE RELIEF VALVE, BYPASSED / SOFT UNLOADING WHEN
SOLENOID IS DE-ENERGIZED
• AO or EX poppet
• DBE cover
• WE42P06_MC1 directional valve
Note:
A DBM type pilot-operated pressure relief valve can
only be leakage-free if the EX poppet type is used in
combination with a seat valve. With this soft unloading
valve, there is still residual leakage through the pilot valve.
X
Y
A
B
P
T
b
A
B
P
A
B
T
1
9
5
12
11 12
4B0
/
11
14a
14b
DBE
14c
B-K
Up to 350 bar (5,000 psi)
14a 14c14b
;;P.. A..
; EP..DBE
Seal material
?@@5D§DI@5§
Size
&1<F5§C@B9>7§§»31BDB9475¼
Pressure range of relief pilot valve
Adjustment of relief valve in cover
e. g. P10 = orifice Ø 1,0 mm in P-port of the
cartridge cover
Option: Orifice configuration
Option: Cover type
Cover with pilot valve interface for
pilot funtion 4B0 (valve function DBM)
Opon: Pressure seng (Adjustment 8 only)
e. g. EP350 = Relief pressure factory set
to 350 bar
Ordering Code Example (Complete Ordering Code in Section "Ordering Code")
Rev. C, March 2025
-

X
E


 
31
2-way Slip-in Pressure Relief Cartridge Valves
ORDERING INFORMATION
DBM - PRESSURE RELIEF VALVE, UNLOADING FUNCTION, 2 PRESSURE
SETTINGS
• Poppet type AO or EX
• Control cover type “DBD”
• Sandwich plate Type ZDBD_AT_/MA
• Pilot valve WE43P06
Note:
A pilot-operated pressure relief valve type DBM can
only be leakage-free if the EX poppet type is used in
combination with a seat valve. With a 4/3-way spool
valve, there is still residual leakage through the pilot valve.
Y
AP
AP
PBTA
PBTA
X
TP
a
b
BA
B
C
A
Y
AP
AP
PBTA
PBTA
X
TP
a
b
BA
B
C
A
1
9
5
12
11 12 13 14a
14e14c14b
/
;;;X..
A00; B00
C.. ; EP..DBD
; ZD...
11
14e
14a
14b
DBD
14c
13
1B0
2B0
B-K
Seal material
?@@5D§DI@5
Size
&1<F5§C@B9>7§§»31BDB9475¼§
Pressure range of relief pilot valve in cover
Adjustment of relief valve in cover
Option: Pressure relief sandwich valves
e. g. X10 = orifice Ø 1,0 mm in X-port of the
cartridge cover
A00; B00 = A- and B-port in cover plugged
Option: Orifice configuration
Option: Cover type
Cover with integrated pressure relief
valve and pilot valve interface
Opon: Pressure seng (Adjustment 8 only)
e. g. EP350 = Relief pressure factory set
to 350 bar
e. g. ZDA9K = ZDBD sandwich valve
- Adjustment aligned to A-port
- Adjustment 9 (see point 11)
- Pressure range K (see point 12)
Up to 350 bar (5,000 psi)
Pilot Function
Pressure Relief bypassed when
solenoid is de-energized
(4/3-Spool Type Pilot Valve)
Pressure Relief bypassed when
A-port solenoid is energized
(4/3-Spool Type Pilot Valve)
Pilot Function "1B0“ Pilot Function "2B0"
Ordering Code Example (Complete Ordering Code in Section "Ordering Code")
Rev. C, March 2025
-

X
E


 
32
2-way Slip-in Pressure Relief Cartridge Valves
ORDERING INFORMATION
DBE - PRESSURE RELIEF VALVE, PROPORTIONALLY OPERATED
• Poppet type AO or EX
• Control cover type "1WDB"
• Pilot valve DBEP06
Note:
When using poppet type EX, a very small orifice in the
X-port of the cover must be selected. This can lead to a
longer closing time.
Pressure Relief Valve, proportionally operated with
manual maximum pressure setting
• Poppet type AO or EX
• Control cover type "DBD"
• Pilot valve DBEP06
Note:
When using poppet type EX, a very small orifice in the
X-port of the cover must be selected. This can lead to
a longer closing time.
Y
MX MZ2
AP
PBT
TP
A
XZ2Z1
B
C
A
Y
AP
AP
PBTA
X
TP
B
C
A
Y
MX MZ2
AP
PBT
TP
A
XZ2Z1
C
1:1,07
B
A
Y
AP
AP
PBTA
X
TP
C
1:1,07
B
A
7 0A0
12
1
9
5
/
;;X.. C..
14a 14b
1WDB
14b
14a
1WDB
Seal material
?@@5D§DI@5§
Size
&1<F5§C@B9>7§§»31BDB9475¼
Option: Cover type
e. g. X10 = orifice Ø 1.0 mm in X-port of the
cartridge cover
Option: Orifice configuration
Cover with pilot valve interface for pilot
function 0A0 (valve function DBE)
B-K
12
Pressure range of the proportional
pressure relief pilot valve
Up to 350 bar (5,000 psi)
7 0A0
1
9
5
B-K
12
/
;;X.. C..
14a 14b
DBD
14b
14a
DBD
Seal material
?@@5D§DI@5
Size
&1<F5§C@B9>7§§»31BDB9475¼§
Pressure range of the proportional
pressure relief pilot valve
Up to 350 bar (5,000 psi)
Option: Cover type
e. g. X10 = orifice Ø 1,0 mm in X-port of the
cartridge cover
Option: Orifice configuration
Cover with integrated pressure relief
valve and pilot valve interface
Ordering Code Example (Complete Ordering Code in Section "Ordering Code")
Ordering Code Example (Complete Ordering Code in Section "Ordering Code")
Rev. C, March 2025
12
-

X
E

-

X
E



33
2-way Slip-in Pressure Relief Cartridge Valves
ORDERING INFORMATION
ORDERING CODE DBV, DBM, DBE
-
1
D …
23
5
6  

N
1
F
6
K
#
9
$
X
10
S

(
016
5
025
032
040
2
11
7
8
9
050
B
12
E
G
K
063
080
100
V
B
Model number (assigned at the factory) Type designation
Seal material
NBR
E
3
Connection
Manifold installation
Series
Max. operating pressure 350 bar
Max. operating pressure 420 bar
DBV
2
DBM
DBE
Valve type
Relief valve, pilot operated
Relief valve with electrical unloading function
Relief valve, proportional pilot operated
?@@5D§DI@5
4UBOEBSEQPQQFUXJUIPVUTIBGUTFBM
1PQQFUXJUITIBGUTFBM
Size
ISO 7368-06-1-1-16
ISO 7368-08-3-1-16
ISO 7368-09-5-1-16
ISO 7368-10-7-1-16
ISO 7368-11-9-1-16
ISO 7368-12-11-1-16
ISO 7368-13-13-1-16
ISO 7368-14-14-1-16
FPM/FKM
&1<F5§#@B9>7§§»31BDB9475¼
4QSJOH4
4QSJOH5
Pilot oil supply
External: X and Y through cover interface
Internal: X through poppet, Y through cover interface
Adjustment
Hexagon screw HEX 13 mm
Electrical proportional adjustment
see 2, relief pressure factory set with cap and tamper proof seal
see 2, cap and tamper proof seal delivered separately
Pressure range of relief pilot valve
70 bar (1,015 psi)
175 bar (2,538 psi)
245 bar (3,553 psi)
350 bar (5,076 psi)
420 bar (6,092 psi)
Rev. C, March 2025
%
Spring U
 

6
Manifold interface
ISO 7368
B
34
2-way Slip-in Pressure Relief Cartridge Valves
ORDERING INFORMATION
…
13
13
–
0B0
/ X.. C..;; ;;;EP..
14a 14b 14c 14d 14e
ZD..
1B0
2B0
0A0
4B0
5B0
6B0
14d
MX
MY
14c
14e
14a
(Leave blank, if not applicable)
Pressure relief bypassed (low-pressure) when solenoid is de-energized (4/2-Spool Type Pilot Valve)
Pressure relief bypassed (low-pressure) when solenoid is energized (4/2- or 4/3-Spool Type Pilot Valve)
Pressure relief bypassed (low-pressure) when solenoid is de-energized (4/3-Spool Type Pilot Valve)
Proportional solenoid (12V, 0-1600 mA)
Pressure relief bypassed (soft unloading) when solenoid is de-energized (Spool Type MC1-Pilot Valve)
Pressure relief bypassed (low-pressure) when solenoid is de-energized (3/2-Seat Type Pilot Valve)
Pressure relief bypassed (low-pressure) when solenoid is energized (3/2-Seat Type Pilot Valve)
Pilot function
14b
DBA
DBD
1WDB
Cover with integrated pressure relief valve
Cover with integrated pressure relief valve and pilot valve interface
Cover with pilot valve interface for pilot function 0A0 (valve function DBE)
Option cover type
Adjustment aligned to X-port
Adjustment aligned to Y-port
Option adjustment alignment
e. g. EP350 = Relief pressure factory set to 350 bar
Option pressure setting (adjustment 8 only)
e. g. ZDA9L = ZDBD sandwich valve
Option pressure relief sandwich valves
e. g. X10 = orifice Ø 1.0 mm in X-port of the cartridge cover
e. g. K12 = orifice Ø 1.2 mm in cartridge poppet
Option orifice configuration
- Adjustment aligned to A-port
- Adjustment 9 (see point 11)
- Pressure range L (see point 12)
e. g. ZDA2K = ZDBD sandwich valve
- Adjustment aligned to A-port
- Adjustment 2 (see point 11)
- Pressure range K (see point 12)
DBE
Cover with pilot valve interface for pilot function 4B0 (valve function DBM)
ORDERING CODE DBV, DBM, DBE
Rev. C, March 2025
2 Valve type
DBD Pressure Valve, Direct Operated
ZDBD Pressure Sandwich Plate Valve,
Direct Operated
4 Size
06 ISO 4401-03-02-0-05
5 Series
K Maximum operating pressure 420 bar
6 Connection interface
4
ISO 4401
7 Pressure Relief Function
PAT Pressure relief from port P and A to T (valve type DBD only)
PT Pressure relief from port P to T (valve type ZDBD only)
AT Pressure relief from port P to T (valve type ZDBD only)
BT Pressure relief from port B to T (valve type ZDBD only)
8 Adjustment
2 Hexagon Screw HEX 13 mm
8 See 2, relief pressure factory set with
cap and tamper proof seal
9 See 2, cap and tamper proof seal
delivered separately
11a Option: orifice
configuration
e. g. P10 = orifice Ø 1.0 mm
in P-port
9
Analog signals
B
70 bar (1,015 psi)
E 175 bar (2,538 psi)
G 245 bar (3,553 psi)
K 350 bar (5,076 psi)
L 420 bar (6,092 psi)
1234567891011
- P 06 K 4 /
Type designation
Model number
(assigned at the
factory)
3 Connection type
P Subplate mounting
1 Seal material
N NBR
V FPM/FKM
10 Adjustment alignment
MA
Adjustment aligned to A-port
MB
Adjustment aligned to B-port
11b
Option: pressure setting
(adjustment 8 only)
e. g. EP350 = relief pressure
factory set to 350 bar
35
2-way Slip-in Pressure Relief Cartridge Valves
ORDERING CODE DBD, ZDBD
ORDERING INFORMATION
© All rights reserved. All changes are reserved.
2-way Slip-in Pressure Relief Cartridge Valves
%#7.13&4463&3&-*&'7"-7&4&/
%#7$%-@&/
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