REXROTH DBA Series User manual

1/26
Information on available spare parts:
www.boschrexroth.com/spc
Pump safety block
Types DBA, DBAW, DBAE(E)
Sizes 16, 25, 32
Component series 2X
Maximum operating pressure 350 bar
Maximum flow 400 l/min
RE 25890/07.07
Replaces: 07.03
Table of contents Features
– Pressureless start-up and circulation of the pump
– Provided for direct mounting to the SAE pressure port of the
pump
– Low circulation pressure due to short distance
– Small compressive volume, hence smooth change-over to
pressureless circulation
– Fast pressure build-up
– 4 pressure adjustment elements, optional:
• Rotary knob
• Sleeve with hexagon and protective cap
• Lockable rotary knob with scale
• Rotary knob with scale
– 5 pressure ratings, optional
– Low noise level due to direct flange-mounting to the pump
H5872
Content Page
Features 1
Ordering code 2, 3
Mating connectors 4
Schematic arrangement of symbols 4
Variant code 5
Examples of possible symbols 6 to 8
Function, sections 9 to 11
Technical data 12
General notes 13
Characteristic curves 13, 14
Unit dimensions 15 to 20
Permissible pumps 21, 22
Type-tested safety valves of type DBA…E,
component series 2X, according to Pressure Equipment
Directive 97/23/EC
(in the following, “PED“ in short)
Ordering code 23
Safety notes 24
Deviating technical data 24
Characteristic curves 25, 26
Inhalt
Table of contents 1
Features 1
Ordering code 2
3
Mating connectors to DIN EN 175301-803 for plug-in connector
“K4“ 4
Mating connectors to DIN EN 175301-803 for plug-in connector
“K14“ 4
Schematic arrangement of symbols 4
Variant code 5
Examples of possible symbols: for fixed displacement pumps
(selection) 6
Examples of possible symbols: for variable displacement pumps
(selection) 7
Examples of possible symbols: for variable displacement pumps
(selection) 8
Function, sections: Type DBA… 9
Function, sections: Type DBAW… 10
Function, sections: Type DBAE(E)… 11
Technical data (for applications outside these parameters, please
consult us!) 12
General notes 13
Characteristic curves (measured with HLP46, ϑoil = 40 °C ± 5
°C) 13
Characteristic curves (measured with HLP46, ϑoil = 40 °C ± 5
°C) 14
Unit dimensions: Type DBA… (dimensions in mm) 15
Unit dimensions: Type DBAW… (dimensions in mm) 16
Unit dimensions: Type DBAW…Z… (dimensions in mm) 17
Unit dimensions: Type DBAE(E)… (dimensions in mm) 18
Unit dimensions (dimensions in mm) 19
Unit dimensions: Explanations of items 20
Permissible pumps: Standard flange (3000 psi) 21
Permissible pumps: High-pressure flange (5000 psi) 22
Ordering code: Type-tested safety valves of type DBA…E, com-
ponent series 2X according to Pressure Equipment Directive
97/23/EC 23
Safety notes: Type-tested safety valves of type DBA…E, com-
ponent series 2X according to Pressure Equipment Directive
97/23/EC 24
Deviating technical data: Type-tested safety valves of type
DBA…E, component series 2X according to Pressure Equip-
ment Directive 97/23/EC 1) 24
Safety notes: Type-tested safety valves of type DBA…E, com-
ponent series 2X according to Pressure Equipment Directive
97/23/EC 25
Safety notes: Type-tested safety valves of type DBA…E, com-
ponent series 2X according to Pressure Equipment Directive
97/23/EC 26
Notes 27
Notes 28
Blocked for new applications / Für Neuanwendung gesperrt

2/26 Bosch Rexroth AG Hydraulics DBA, DBAW, DBAE(E) RE 25890/07.07
Ordering code
Pump safety block
Without directional valve = No code
With built-on directional valve (data sheet RE 23178) = W
With built-on proportional pressure relief valve for external = E
control electronics, valve type DBET-5X/…-27 10)
With built-on proportional pressure relief valve with integrated = EE
control electronics, valve type DBETE-5X/…-27 10)
Size 16 = 15
Size 25 = 25
Size 32 = 30
Without directional valve = No code
With built-on directional valve, normally closed = A 1)
With built-on directional valve, normally open; generally with type DBAE(E) = B 1)
Connection / SAE flange 2)
Standard flange (3000 to 5000 psi) = F
High-pressure flange (5000 psi) = H
Type of adjustment element for pressure adjustment 3)
Rotary knob (rotary knob with scale “KW“) = 1
Sleeve with hexagon and protective cap (spindle with protective cap “S“; = 2
Adjustment element on pressure switch “AS”)
Lockable rotary knob with scale (lockable rotary knob with scale “KS“) = 3 4)
Rotary knob with scale (rotary knob with scale “KW“) = 7
Without pressure switch = –
With built-on pressure switch type HED 8 OH… = D 7)
With plug-in connector to DIN EN 175301-803, without mating connector (data sheet RE 50061)
Component series 20 to 29 (20 to 29: unchanged installation and connection dimensions) = 2X
Pressure rating 5)
Set pressure up to 50 bar = 50
Set pressure up to 100 bar = 100
Set pressure up to 200 bar = 200
Set pressure up to 315 bar = 315
Set pressure up to 350 bar = 350
DBA 2X
1) Ordering detail required only for variant with built-on direc-
tional valve “DBAW“ or proportional pressure relief valve
“DBAE(E)“.
2) Please observe pressure ratings and connection dimen-
sions on page 19!
3) Adjustment element for pressure switch “HED 8“ in brack-
ets!
4) H-key, Material no. R900008158, is included in the scope of
supply.
5) Identical pressure rating of pressure relief cartridge valve
“DB 20 K“, pressure relief valve (sandwich plate valve)
“Z(2)DB 6“, and pressure switch “HED 8“.
6) Attention! The unintended actuation of the manual over-
ride can result in uncontrolled machine movements!
7) Mating connectors, separate order, see page 4 and/or page
18 for variant “DBAEE“.
8) Generally when used for pressure relief function for and
control of variable displacement pump “A10VSO“, sizes 28
to 140 (RE 92711). Preferably with pressure and flow con-
troller “DFR1“, pressure controller “DR “ or power controller
“DFLR“, size 18 (RE 92712)
9) Only when used for pressure relief function for and control
of variable displacement pump “A10VSO“
10) Drain pilot oil from DBET(E) externally
11) When used on variable displacement pump with DFLR con-
troller, the orifice in the X port of the pump controller must
be removed!
Blocked for new applications / Für Neuanwendung gesperrt

Hydraulics Bosch Rexroth AG
RE 25890/07.07 DBA, DBAW, DBAE(E) 3/26
Further details in clear text
Type test
No code = Without type test
E = Type-tested safety valve according to PED 97/23/EC
Seal material
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
Observe compatibility of seals with hydraulic fluid used!
Orifice placement for fixed displacement pumps
No code = Lateral channel closed, transverse channel open, pilot oil bore open;
(standard for fixed displacement pumps; pure DB/DBW function)
Orifice placement for variable displacement pumps
A00 = Lateral channel closed, transverse channel open; pilot oil bore closed
(e.g. for A4VSO140 with DRG controller)
A08 11) = Orifice Ø0.8 mm in lateral channel, transverse channel open; pilot oil bore
closed (standard for control pump with DFR1 or DFLR controller)
A10 11) = Orifice Ø1.0 mm in lateral channel, transverse channel open; pilot oil bore closed
(for orifice placement of the block, see symbols on pages 6 to 8)
Electrical connection 1)
K4 7) = Without mating connector; individual connection with plug-in connector
to DIN EN 175301-803
K31 7) = Without mating connector; individual connection with plug-in connector
to DIN EN 175201-804 (only variant “DBAEE…“)
N9 1; 6) = With concealed manual override (standard)
N1; 6) = With manual override
No code = Without manual override
G24 1) = 24 V DC (generally with variant “DBAE(E)…“)
G205 1) = 205 V DC
W230 1) = 230 V AC 50/60 Hz
No code = Without directional valve
6E 1) = With directional spool valve (only with type DBAW)
No code = Standard version
U = Valve for minimum opening pressure (not with type DBAE(E))
No code = Without additional pressure relief valve
Z5) = With built-on pressure relief valve type ZDB 6 VB…-4X/..SO2 (RE 25751)
ZZ 9; 5) = With built-on pressure relief valve type Z2DB 6 VC…-4X/..SO2 (RE 25751)
*
Further standard types and components are shown in the
EPS (standard price list).
Blocked for new applications / Für Neuanwendung gesperrt

4/26 Bosch Rexroth AG Hydraulics DBA, DBAW, DBAE(E) RE 25890/07.07
Mating connectors to DIN EN 175301-803 for plug-in connector “K4“
For details
and further mat-
ing connectors,
see RE 08006
Color
Material no.
Without circuitry
With indicator lamp
12 … 240 V
With rectifier
12 … 240 V
With indicator lamp and
Zener diode suppressor
circuit 24 V
Gray R901017010 – – –
Black R901017011 R901017022 R901017025 R901017026
Material no.
Without circuitry
250 V
With circuitry (indicator lamp) AC/DC
6 … 14 V 16 … 30 V 36 … 60 V 90 … 130 V 180 … 240 V
Black R901017012 R901017030 R901017048 R901017032 R901017035 R901017037
Imax 16 A 4 A 4 A 4 A 4 A 4 A
Schematic arrangement of symbols
Symbol Location of orifices/plugs items 4, 5 and 6
2
45
3 3
1
6
MP
P1
A
X
B
B
X
TP
A
T
Y1)
5
M
4
X
6
1) Only with type DBAE(E)
For others, see variant code on page 5
Mating connectors to DIN EN 175301-803 for plug-in connector “K14“
Blocked for new applications / Für Neuanwendung gesperrt

Hydraulics Bosch Rexroth AG
RE 25890/07.07 DBA, DBAW, DBAE(E) 5/26
Variant code
1) With DBAW with ZDB/Z2DB valve
2) With DBAW without ZDB/Z2DB valve
3) With DBAE for external control electronics/amplifier card
4) With DBAEE with internal control electronics/amplifier card
5) Only 1 pressure relief feature
6) Standard for fixed displacement pumps
1 2 3 4,5,6 1 2 3 4 5 6
DBA 15 AF 1 – 2X/ 50 – * E G … ***
W 25 BH 2 D 100 Z 6 W A00
E 30 3 200 ZZ A08
EE 7 315 A10
350
Cover plate HSA 06 A 001 … 4WE 6 H 6X.. 4WE 6 HB 6X.. 4WE 6 L37B.6X/.. DBET-5X/..K4.-27 DBETE-5X/..K31.-27 HED 8 OH 2X/...K14.. ZDB 6 VB.-4X/...SO2 Z2DB 6 VC.-4X/...SO2 Orifice Ø0.8 in lateral channel Orifice Ø1.0 in lateral channel Plug in lateral channel Plug in pilot oil bore/cartridge Plug in pilot oil bore
DBA X
W X X X
E X X
EE X X
A (normally closed) X
B (normally open) X1) X2) X3) X4)
– (without pressure switch) –
D (with pressure switch) X
– (standard valve 5)) – –
Z (max. 2 pressure relief features) X
ZZ (max. 3 pressure relief features) X
No code 6) X
A00 X X
A08 X X
A10 X X
Blocked for new applications / Für Neuanwendung gesperrt

6/26 Bosch Rexroth AG Hydraulics DBA, DBAW, DBAE(E) RE 25890/07.07
Examples of possible symbols: for fixed displacement pumps (selection)
Type DBA…2X/… Type DBAW.B…2X/.Z
A
P M
P1
X
BT
A
P M
P1
X
B
B
ba
P T
A
A
B
T
Type DBAW.A…2X/… Type DBAE(E)…2X/…
A
B
X
B
P M
P T
P1
A
T
X
A B
P M Y1)
P1
P
T
Type DBAW.B…2X/…
BA
B
X
P M
P1
A
P T
T
1) Attention!
Port Y of the DBET valve on the DBA block must be connected
at zero pressure to the tank! (If required, via leakage line of the
hydraulic system.)
Blocked for new applications / Für Neuanwendung gesperrt

Hydraulics Bosch Rexroth AG
RE 25890/07.07 DBA, DBAW, DBAE(E) 7/26
Examples of possible symbols: for variable displacement pumps (selection)
– Preferably for A10VSO with DR, DFR1 or DFLR controller 2)
Type DBAW.B…2X/…A08 Type DBAW.B…2X/.Z…A08
X
X
A
B
B
P M
P1
P T
A
T
X
A
P M
P1
X
B
B
a b
P T
A
A
B
T
Type DBAE(E)…2X/…A08 Type DBAW.B…2X/.ZZ…A08
X
A B
P XM Y1)
P1
P
T
T
MP X
P1
B
X
A
B
ba
P T
A
A
B
A
B
T
1) Attention!
Port Y of the DBET valve on the DBA block must be con-
nected at zero pressure to the tank! (If required, via leakage
line of the hydraulic system.)
2) Attention!
When used on variable displacement pump with DFLR
controller, the orifice must be removed from the X port of the
pump controller!
Blocked for new applications / Für Neuanwendung gesperrt

8/26 Bosch Rexroth AG Hydraulics DBA, DBAW, DBAE(E) RE 25890/07.07
Examples of possible symbols: for variable displacement pumps (selection)
– Preferably for A10VSO with DRG controller
Type DBAW.B…2X/.Z…A00
P M X
P1
X
A
B
B
a b
P T
A
T
A
B
Type DBAW.B…2X/.ZZ…A00
MP
P1
A
X
B
B
a b
X
TP
A
A
B
A
B
T
Type DBAE(E)…2X/…A00
X
A
T
P M X Y1)
P
P1
B T
1) Attention!
Port Y of the DBET valve on the DBA block
must be connected at zero pressure to the
tank! (If required, via leakage line of the hy-
draulic system.)
Blocked for new applications / Für Neuanwendung gesperrt

T
P
P1
M
T
P
P1
M
1
13
14
6 5 11 109
28
3
4
712
1 6 5 11 109
28
4
71213
Hydraulics Bosch Rexroth AG
RE 25890/07.07 DBA, DBAW, DBAE(E) 9/26
Function, sections: Type DBA…
General
Pump safety blocks of type DBA… are pilot operated pressure
relief valves, which are integrated in a block and provided for
direct mounting to the SAE pressure port of the pump.
They are used for the limitation (DBA) or limitation and sole-
noid-operated unloading (DBAW, DBAE.) of the operating
pressure.
These pump safety blocks basically consist of valve block
(1) and pressure relief cartridge valve type DB 20 K (2) to
RE 25818. Optionally, a pressure switch of type HED 8 (3) to
RE 50061 can be fitted to the valve block.
The valve housing is provided with a port P for the inlet and a
port P1 for the outlet of the hydraulic fluid. The pressure relief
cartridge valve is installed in a branch of this passage and pro-
vides a connection to port T (tank line) in the open position.
Type DBA 15 .2 –2X/…
Type DBA 15 .2 D2X/…
In the basic version, the porting pattern of size 6 is covered by
cover plate (4). The pressure applied in the passage connec-
tion (P–P1) acts on main spool (5) of the pressure relief car-
tridge valve. At the same time, the pressure is applied via ori-
fice bores (6 and 7) to poppet (8). When the pressure in port
P exceeds the pressure set on spring (9), poppet (8) opens
against spring (9).
Now, the hydraulic fluid flows from channel P via orifice bores
(6 and 7) into spring chamber (10), from where it is fed internal-
ly via pilot line (11) to the tank.
Due to the balanced condition at spool (5), hydraulic fluid flows
from channel P to channel T while the set operating pressure is
maintained.
A pressure gauge connection (12) allows the operating pres-
sure to be checked.
Pump safety block type DBA…D (with pressure switch)
The use of an electrical pressure switch of type HED 8 (3) to
RE 50061 allows an electric circuit to be closed or interrupted
via pilot line (13).
In the basic version, pilot line (13) is plugged with a plug screw
(14).
Pressure gauge port M and tank port T
are drawn rotated by 90 °!
Blocked for new applications / Für Neuanwendung gesperrt

P
P1
X
T P
P (T)
A B
(T)A B
16
15
15
P
10/26 Bosch Rexroth AG Hydraulics DBA, DBAW, DBAE(E) RE 25890/07.07
Function, sections: Type DBAW…
Pump safety block type DBAW
In principle, the function of this block corresponds to that of
block type DBA…. Here, unloading across the main spool is,
however, accomplished through the activation of built-on direc-
tional valve (15). In this variant, cover plate (4) is not provided.
Pump safety block type DBAW.B…Z… for fixed displacement
pump (with pressure relief valve)
In principle, the function corresponds to that of type DBAW….
The pressure relief valve type ZDB 6 (16) to RE 25751 and the
operation of directional valve (15) deactivates the pilot control
of pressure relief cartridge valve type DB 20 K, and the pres-
sure set on pressure relief valve type ZDB 6 is activated. The
pressure setting on pressure relief valve type ZDB 6 is only ef-
fective, if it is lower than the setting of pressure relief cartridge
valve type DB 20 K.
Pump safety block Type DBAW.B…Z…A for control pump
A10V… (with pressure relief valve)
In principle, the function corresponds to that of type DBAW….
Type DBAW 15 .2–2X/.Z…
Type DBAW 15 .2–2X/…
Pressure relief valve type ZDB 6 (16) to RE 25751 and the op-
eration of directional valve (15) cause a change in pressure at
pilot port X. The change in pressure, which is set on pressure
relief valve type ZDB 6, acts on the controller of the pump. The
pressure set on pressure relief valve type ZDB 6 is only ef-
fective, if it is lower than the setting on the pressure relief car-
tridge valve type DB 20 K.
Pump safety block DBAW.B…ZZ…A for control pump A10V..
(with pressure relief valve)
In principle, the function corresponds to that of type DBAW….
Due to pressure relief valve type Z2DB 6 (16) to RE 25751 and
operation of directional valve (15) two pressures can be gener-
ated in pilot port X. The pressure setting on pressure relief
valve type Z2DB 6 is only effective, if it is lower than the setting
on pressure relief cartridge valve type DB 20 K.
Drawn rotated by 90°
Port X drawn offset by 90°!
Blocked for new applications / Für Neuanwendung gesperrt