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Information on available spare parts: www.boschrexroth.com/spc

Pump safety block

Types DBA, DBAW, DBAE(E)

Sizes �6, 25, 32Component series 2XMaximum operating pressure 350 barMaximum flow 400 l/min

RE 25890/07.07Replaces: 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 �

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 ��

Technical data �2

General notes �3

Characteristic curves �3, �4

Unit dimensions �5 to 20

Permissible pumps 2�, 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 �

Features �

Ordering code 2

3

Mating connectors to DIN EN �7530�-803 for plug-in connector “K4“ 4

Mating connectors to DIN EN �7530�-803 for plug-in connector “K�4“ 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… �0

Function, sections: Type DBAE(E)… ��

Technical data (for applications outside these parameters, please consult us!) �2

General notes �3

Characteristic curves (measured with HLP46, ϑoil = 40 °C ± 5 °C) �3

Characteristic curves (measured with HLP46, ϑoil = 40 °C ± 5 °C) �4

Unit dimensions: Type DBA… (dimensions in mm) �5

Unit dimensions: Type DBAW… (dimensions in mm) �6

Unit dimensions: Type DBAW…Z… (dimensions in mm) �7

Unit dimensions: Type DBAE(E)… (dimensions in mm) �8

Unit dimensions (dimensions in mm) �9

Unit dimensions: Explanations of items 20

Permissible pumps: Standard flange (3000 psi) 2�

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 �) 24



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 codeWith built-on directional valve (data sheet RE 23�78) = WWith built-on proportional pressure relief valve for external = E control electronics, valve type DBET-5X/…-27 �0)

With built-on proportional pressure relief valve with integrated = EE control electronics, valve type DBETE-5X/…-27 �0)

Size �6 = 15 Size 25 = 25 Size 32 = 30

Without directional valve = No codeWith built-on directional valve, normally closed = A �)

With built-on directional valve, normally open; generally with type DBAE(E) = B �)

Connection / SAE flange 2) Standard flange (3000 to 5000 psi) = FHigh-pressure flange (5000 psi) = H

Type of adjustment element for pressure adjustment 3)

Rotary knob (rotary knob with scale “KW“) = 1Sleeve 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 �7530�-803, without mating connector (data sheet RE 5006�)

Component series 20 to 29 (20 to 29: unchanged installation and connection dimensions) = 2X

Pressure rating 5)

Set pressure up to 50 bar = 50Set pressure up to �00 bar = 100Set pressure up to 200 bar = 200Set pressure up to 3�5 bar = 315Set pressure up to 350 bar = 350

DBA 2X

�) 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 �9!

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 �8 for variant “DBAEE“.

8) Generally when used for pressure relief function for and control of variable displacement pump “A�0VSO“, sizes 28 to �40 (RE 927��). Preferably with pressure and flow con-troller “DFR�“, pressure controller “DR “ or power controller “DFLR“, size �8 (RE 927�2)

9) Only when used for pressure relief function for and control of variable displacement pump “A�0VSO“

�0) Drain pilot oil from DBET(E) externally ��) When used on variable displacement pump with DFLR con-

troller, the orifice in the X port of the pump controller must be removed!


Hydraulics Bosch Rexroth AGRE 25890/07.07 DBA, DBAW, DBAE(E) 3/26

Further details in clear text

Type testNo code = Without type testE = Type-tested safety valve according to PED 97/23/EC

Seal materialNo code = NBR seals V = FKM seals

(other seals on request) Attention!

Observe compatibility of seals with hydraulic fluid used!

Orifice placement for fixed displacement pumpsNo 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 pumpsA00 = Lateral channel closed, transverse channel open; pilot oil bore closed (e.g. for A4VSO�40 with DRG controller) A08 ��) = Orifice Ø0.8 mm in lateral channel, transverse channel open; pilot oil bore

closed (standard for control pump with DFR� or DFLR controller)A10 ��) = Orifice Ø�.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 �)

K4 7) = Without mating connector; individual connection with plug-in connector to DIN EN �7530�-803

K31 7) = Without mating connector; individual connection with plug-in connector to DIN EN �7520�-804 (only variant “DBAEE…“)

N9 �; 6) = With concealed manual override (standard)N �; 6) = With manual override No code = Without manual override

G24 �) = 24 V DC (generally with variant “DBAE(E)…“)G205 �) = 205 V DC W230 �) = 230 V AC 50/60 Hz

No code = Without directional valve6E �) = With directional spool valve (only with type DBAW)

No code = Standard versionU = Valve for minimum opening pressure (not with type DBAE(E))

No code = Without additional pressure relief valveZ 5) = With built-on pressure relief valve type ZDB 6 VB…-4X/..SO2 (RE 2575�)ZZ 9; 5) = With built-on pressure relief valve type Z2DB 6 VC…-4X/..SO2 (RE 2575�)

*

Further standard types and components are shown in the EPS (standard price list).



Mating connectors to DIN EN �7530�-803 for plug-in connector “K4“

For details and further mat-ing connectors, see RE 08006

Color

Material no.

Without circuitryWith indicator lamp

�2 … 240 VWith rectifier �2 … 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 … �4 V �6 … 30 V 36 … 60 V 90 … �30 V �80 … 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

4 5

3 3

1

6

MP

P1

A

X

B

B

X

TP

A

T

Y 1)

5

M

4

X

6

�) Only with type DBAE(E)

For others, see variant code on page 5

Mating connectors to DIN EN �7530�-803 for plug-in connector “K�4“



Variant code

�) With DBAW with ZDB/Z2DB valve2) With DBAW without ZDB/Z2DB valve3) With DBAE for external control electronics/amplifier card4) With DBAEE with internal control electronics/amplifier card5) Only � pressure relief feature6) Standard for fixed displacement pumps

1 2 3 4,5,6 1 2 3 4 5 6

DBA �5 AF � – 2X/ 50 – * E G … ***

W 25 BH 2 D �00 Z 6 W A00

E 30 3 200 ZZ A08

EE 7 3�5 A�0

350

Cov

er p

late

HS

A 0

6 A

00�

…

4WE

6 H

6X

..

4WE

6 H

B 6

X..

4WE

6 L

37B

.6X

/..

DB

ET-

5X/..

K4.

-27

DB

ETE

-5X

/..K

3�.-2

7

HE

D 8

OH

2X

/...K

�4..

ZD

B 6

VB

.-4X

/...S

O2

Z2D

B 6

VC

.-4X

/...S

O2

Orif

ice

Ø0.

8 in

late

ral c

hann

el

Orif

ice

Ø�

.0 in

late

ral c

hann

el

Plu

g in

late

ral c

hann

el

Plu

g in

pilo

t oil

bore

/car

trid

ge

Plu

g in

pilo

t oil

bore

DBA X

W X X X

E X X

EE X X

A (normally closed) X

B (normally open) X�) 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

A�0 X X



Examples of possible symbols: for fixed displacement pumps (selection)

Type DBA…2X/… Type DBAW.B…2X/.Z

A

P M

P1

X

B T A

P M

P1

X

B

B

baP 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

�) 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.)



Examples of possible symbols: for variable displacement pumps (selection)

– Preferably for A�0VSO with DR, DFR� 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 bP 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

baP T

A

A

B

A

B

T

�) 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!



Examples of possible symbols: for variable displacement pumps (selection)

– Preferably for A�0VSO with DRG controller

Type DBAW.B…2X/.Z…A00

P M X

P1

X

A

B

B

a bP 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

�) 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.)


TP

P1

M

TP

P1

M

1

13

14

6 5 11 109

28

3

4

712

1 6 5 11 109

28

4

71213


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 (�) and pressure relief cartridge valve type DB 20 K (2) to RE 258�8. Optionally, a pressure switch of type HED 8 (3) to RE 5006� can be fitted to the valve block.

The valve housing is provided with a port P for the inlet and a port P� 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–P�) 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 (�0), from where it is fed internal-ly via pilot line (��) 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 (�2) 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 5006� allows an electric circuit to be closed or interrupted via pilot line (�3).

In the basic version, pilot line (�3) is plugged with a plug screw (�4).

Pressure gauge port M and tank port T are drawn rotated by 90 °!


P

P1

X

T P

P (T)A B

(T)A B16

15

15

P


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 (�5). 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 (�6) to RE 2575� and the operation of directional valve (�5) 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 A�0V… (with pressure relief valve)


Type DBAW 15 .2–2X/.Z…

Type DBAW 15 .2–2X/…

Pressure relief valve type ZDB 6 (�6) to RE 2575� and the op-eration of directional valve (�5) 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 A�0V.. (with pressure relief valve)


Due to pressure relief valve type Z2DB 6 (�6) to RE 2575� and operation of directional valve (�5) 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°!


P

P113

14

11 109

287X

P

P

561

17

Y


Function, sections: Type DBAE(E)…

Pump safety block type DBAE(E) for fixed displacement pump (with proportional pressure relief valve)

In principle the function corresponds to that of type DBA….

Unloading across the main spool is, however, achieved by activating the built-on proportional pressure relief valve type DBET/DBETE (component series 5X) (�7) to RE 29�65. Cover plate (4) is not provided.

The pressure set on proportional pressure relief valve type DBET/DBETE is only effective, if it is lower than the setting on pressure relief cartridge valve type DB 20 K.

Type DBAE 15 .2…

Type DBAEE 15 .2…

Pump safety block Type DBAE(E) for variable displacement pump type A�0V.. (with proportional pressure relief valve)

In principle, the function corresponds to that of type DBA….

By means of proportional pressure relief valve type DBET/DBETE (component series 5X) (�7) a change in pressure is achieved in pilot port X. The change in pressure acts on the controller of the pump. Cover plate (4) is not provided.

The pressure set on proportional pressure relief valve type DBET/DBETE is only effective, if it is below the setting of pres-sure relief cartridge valve type DB 20 K.

Port Y must be connected at zero pressure to the tank!

Port X drawn off-set by 90°!

Drawn rotated by 90°



Technical data (for applications outside these parameters, please consult us!)

GeneralSize Size �6 25 32

Weight With SAE flange psi 3000 5000 3000 5000 3000 5000

– Pump safety block Type DBA… kg 5.4 5.4 5.4 5.3 5.4 6.0

Type DBAW… kg 6.� 6.� 6.� 6.0 6.� 6.7

Type DBAW…Z… kg 7.9 7.9 7.9 7.8 7.9 8.5

Type DBAW…ZZ… kg 8.� 8.� 8.� 8.0 8.� 8.7

Type DBAE… kg 6.4 6.4 6.4 6.3 6.4 7.0

Type DBAEE… kg 7.0 7.0 7.0 6.9 7.0 7.6

– Pressure switch Type HED 8… kg + 0.8

Installation position Optional

Ambient temperature range NBR seals FKM seals

– Type DBA… °C –30 to +80 –�5 to +80

– Type DBAW… °C –30 to +50 –�5 to +50

– Type DBAE(E)… °C –20 to +50 –�5 to +50

HydraulicMaximum operating pressure – Port P bar 350

Maximum counterpressure, port T

– Type DBA… bar 250

– Type DBAW… bar 2�0 with DC solenoid, and �60 with AC solenoid

– Type DBAE(E)… bar At zero pressure to tank

Minimum set pressure bar Depending on flow (see characteristic curves on page �3)

Maximum set pressure bar 50; �00; 200; 3�5; 350 (type HED 8: 50; �00; 200; 350)

Maximum flow l/min 300 400 400

Hydraulic fluid – Type DBA(W)… Mineral oil (HL, HLP) to DIN 5�524 �); fast bio-degradable hydraulic fluids to VDMA 24568 (see also RE 9022�); HETG (rape seed oil) �); HEPG (polyglycols) 2); HEES (synthetic esters) 2); other hydraulic fluids on request

– Type DBAE(E)… Mineral oil (HL, HLP) to DIN 5�524 �); other hydraulic fluids on request

Hydraulic fluid temperature range

NBR seals FKM seals

– Type DBA(W)… °C –30 to +80 –20 to +80

– Type DBAE(E)… °C –20 to +80 –�5 to +80

Viscosity range – Type DBA(W)… mm2/s �0 to 800

– Type DBAE(E)… mm2/s �5 to 380

Permissible max. degree of contamination of the hydraulic fluid - cleanliness class to ISO 4406 (c)

Class 20/�8/�5 3)

�) Suitable for NBR and FKM seals2) Only suitable for FKM seals 3) The cleanliness classes specified for components must be

adhered to in hydraulic systems. Effective filtration prevents malfunction and, at the same time, prolongs the service life of components.

For the selection of filters, see data sheets RE 50070, RE 50076, RE 5008�, RE 50086, RE 50087 and RE 50088.

Further technical data:

– Directional spool valve RE 23�78

– Pressure relief valve (sandwich plate) RE 2575�

– Proportional pressure relief valve RE 29�65

• Associated amplifier (for type DBAE) type VT-VSPA�-2-�X

RE 30��5

– Pressure switch RE 5006�

For deviating technical data of type-tested safety valves, see page 24.


50

100

150

200

250

300

350

400

0 100 200 300 40050 150 250 350

1 2


Inle

t pre

ssur

e in

bar

→

�) The characteristic curves are valid for an outlet pressure of pT = 0 bar over the entire flow range!

Note!

The characteristic curves were measured with internal pilot oil drain. With internal pilot oil drain, the inlet pressure increases by the outlet pressure present in port T.

Characteristic curves (measured with HLP46, ϑoil = 40 °C ± 5 °C)

Flow in l/min →

Inlet pressure in dependence on the flow 1)

General notes

– With types DBAW.B and DBAE/DBAEE the lowest settable pressure (circulation pressure) is set in the event of a power failure, and type DBAW..A changes over to the pressure relief function.

– The unloading function (DBAW/DBAE/DBAEE) must not be used for safety functions!

Types DBA… and DBAW…

Types DBA…Z…, DBA…ZZ… and DBAE(E)…

1 Size �6

2 Size 25 and 32


5

10

15

20

25

30

35

40

0 100 200 300 40050 150 250 350

1

2 3

5

10

15

20

25

30

35

40

0 100 200 300 40050 150 250 350

1

2 3


Characteristic curves (measured with HLP46, ϑoil = 40 °C ± 5 °C)

Note!

The characteristic curves were measured with internal pilot oil drain. With internal pilot oil drain, the inlet pressure increases by the outlet pressure present in port T.

Min

imum

set

pre

ssur

e,

Circ

ulat

ion

pres

sure

in b

ar →

Flow in l/min →

Minimum set pressure and circulation pressure in dependence on the flow 1)

Standard version



1 Size �6

2 Size 25

3 Size 32

Min

imum

set

pre

ssur

e,

circ

ulat

ion

pres

sure

in b

ar →

Flow in l/min →

Minimum set pressure and circulation pressure in in dependence on the flow 1)

Variant “U“

�) The characteristic curves are valid for an outlet pressure of pT = 0 bar over the entire flow range!



1 Size �6

2 Size 25

3 Size 32


0,01/100

Rtmax 4

M X

L3

B1

145

40,5

B3

B4

31

L2

99

26,3

B2

65

48L1

H5 H

2

Ø30

H3

H4

85

8

4 2 3

32,5

P

P1

15

T

34,5

H1

15B6

15B5

7

5

6

14

3

82

90

1

Ø32

Ø35

40

100

12 9

13

18

1011

103

481

24 25

28


For explanations of items, see page 20

Unit dimensions: Type DBA… (dimensions in mm)

Required surface quality of valve mounting face

Standard flanges type DBA…F…

Size L1 L2 L3 B1 B2 B3 B4 B5 B6 H1 H2 H3 H4 H5

16 88 ��7 22.2 47.6 28.5 45 80 ��0 �05 24 47 22 60 37

25 88 ��5.5 26.2 52.4 28.5 45 80 ��0 �05 24 47 22 60 37

32 �08.5 �08.5 30.2 58.7 30.5 47 80 ��0 �05 30 47 20 60 4�

High-pressure flanges type DBA…H…

Size L1 L2 L3 B1 B2 B3 B4 B5 B6 H1 H2 H3 H4 H5

16 88 ��7 23.8 50.8 28.5 45 80 ��0 �05 24 47 22 60 37

25 84 ��5.5 27.8 57.2 28.5 45 80 ��0 �05 24 47 22 60 37

32 �08.5 �08.5 3�.8 66.7 26 52 90 ��5 ��0 30 50 20 64 4�


0,01/100

Rtmax 4

M X

H7

815

H6

15

16

56

34

1

14

P

15

T

14

B7

B2

19

P1

57,3

201

B8

24PT

F1F2 F3

F4

3,5

3,5

18

18

14

14

1917

26

25

28



For dimensions for

– pump safety block,

– pressure switch type HED 8 and

– further adjustment elements,

see page �5.

Unit dimensions: Type DBAW… (dimensions in mm)


Standard flanges type DBAW…F…

Size B2 B7 B8 H6 H7

16 �2 �44.5 �09.5 �59 �53

25 �2 �44.5 �09.5 �59 �53

32 �0 �44.5 ��.5 �59 �53

High-pressure flanges type DBAW…H…

Size B2 B7 B8 H6 H7

16 �2 �44.5 �09.5 �59 �53

25 �2 �44.5 �09.5 �59 �53

32 �4.5 �45 �07 �63 �57


0,01/100

Rtmax 4

M X

H9

8

15

H8

15

16

56

34

20

14

228

1 17

382 901

227

256,

518

14

13

912

11

P

P1

T

1510

382 901

239

293

2424

222

24

PTF1

F2 F3F4

26

25

28

B2

57,3


Unit dimensions: Type DBAW…Z… (dimensions in mm)


For dimensions for




see page �5.

For dimensions for directional spool valve type WE 6, see page �6.


Standard flanges type DBAW..F…Z…

Size B2 H8 H9

16 �2 �99 �93

25 �2 �99 �93

32 �0 �99 �93

High-pressure flanges type DBAW..H…Z…

Size B2 H8 H9

16 �2 �99 �93

25 �2 �99 �93

32 �4.5 203 �97


0,01/100

Rtmax 4

M X

199,

5

H11

815

H10

15

177,

5

22

56

341B2

18 21

14

T P

245,

5

14

P

P1

15

T

15

1423

24

25

F1F2 F3

F4

Y

B9

57,3

27

2628


Unit dimensions: Type DBAE(E)… (dimensions in mm)


For dimensions for




see page �5.


Standard flanges type DBAE(E)…F

Size B2 B9 H10 H11

16 �2 �3 �47 �47

25 �2 �3 �47 �47

32 �0 �5 �47 �47

High-pressure flanges type DBAE(E)…H

Size B2 B9 H10 H11

16 �2 �3 �47 �47

25 �2 �3 �47 �47

32 �4.5 �0.5 �5� �5�



Standard flanges type DBA…F… to DIN ISO 6�62-�S

ize

Ports 4 valve mounting screws ISO 4762 - 10.9 1)

Tightening torque

MT in Nm 2)

P and P1 T X, M Material no.

16 SAE 3/4“ G3/4 G�/4 M�0 x 95 R9�3000338 52

25 SAE �“ G� G�/4 M�0 x 95 R9�3000338 52

32 SAE � �/4“ G� �/4 G�/4 M�0 x 95 R9�3000338 52

Unit dimensions (dimensions in mm)

Permissible pressures (flanged connections to DIN ISO 6�62-�)

in psi in bar

SAE 3/4“ 5000 350

SAE �“ 4500 3�5

SAE � �/4“ 3600 250

High-pressure flanges type DBA…H… to DIN ISO 6�62-2

Siz

e

Ports 4 valve mounting screws ISO 4762 - 10.9 1)

Tightening torque

MT in Nm 2)

P and P1 T X Material no.

16 SAE 3/4“ G3/4 G�/4 M�0 x 95 R9�3000338 52

25 SAE �“ G� G�/4 M�2 x �05 R9�3000659 66

32 SAE � �/4“ G� �/4 G�/4 M�4 x �05 R9�3000660 ��3

Permissible pressures (flanged connections to DIN ISO 6�62-2)

in psi in bar

SAE 3/4“ 5000 350

SAE �“ 5000 350

SAE � �/4“ 5000 350

�) Valve mounting screws (separate order)

4 hexagon socket head cap screws ISO 4762 - 10.9-flZnnc-240h-L (with friction coefficient µtotal = 0.09 to 0.�4)

Attention! For strength reasons, no other valve mounting screws may be used!

Depending on the operating pressure, flange height and thread depth of the pump plate, different screw lengths may be required!

2) The specified tightening torques are guidelines when screws with the specified friction coefficients and a torque wrench are used (tolerance ±�0%).



Unit dimensions: Explanations of items

1 Nameplate

2 Cover plate type HSA 06 A00�-3X… (data sheet RE 48042)

3 Port X for variable displacement pump type A�0VSO (otherwise plugged); G�/4

4 Port M for pressure gauge; G�/4

5 Mating connector without circuitry (separate order, see page 4)

6 Mating connector with circuitry (separate order, see page 4)

7 Pressure switch type HED 8 OH…(data sheet RE 5006�)

8 Adjustment element “�” �)

9 Adjustment element “2” �)



12 Hexagon A/F�0

13 Space required to remove key

14 Space required to remove mating connector

15 Seal rings

16 Directional spool valve type WE 6 (data sheet RE 23�78)

�) Type DBAW…Z: Identical adjustment types as for pressure relief cartridge valve type DB 20 K and pressure relief valve type Z(2)DB 6!

17 Dimension for solenoid with concealed manual over-ride “N9“ (standard) – the manual override can only be operated at tank pressures of up to approx. 50 bar. Avoid damage to the bore for the manual override! (Use special tool for operation, separate order, Material no. R900024943)

18 Dimension for valve with manual override “N“

19 Dimension for valve without manual override

20 Pressure relief valve (sandwich plate) type Z(2)DB 6 … (data sheet RE 2575�)

21 Dimension for valve with integrated electronics type DBAEE…

22 Proportional pressure relief valve type DBET(E)… (data sheet RE 29�65)

23 Mating connector for type DBAEE to DIN EN �7520�-804 (separate order, Material no. R90021267)

24 Hexagon A/F 30, Tightening torque MT = 50 Nm

(For tightening, a torque wrench with a tolerance of �0% must be used.)

25 Locknut A/F 22, Tightening torque MT = �0±5 Nm

26 Porting pattern to DIN 24340 Form A (without locat-ing bore), or ISO 440�-03-02-0-05 (with locating bore for locating pin ISO 8752-3x8-St, Material no. R900005694, separate order)

27 Port Y (G�/4) must be connected at zero pressure to tank (if required, via leakage line L of the hydraulic sys-tem)!

28 Valve mounting bores



Permissible pumps: Standard flange (3000 psi)

�) When the pump is used with a SAE flange as pressure con-nection, “..07..“ in the type code of the pump

2) Attention!

Depending on the drive motor, a spacer plate may be re-quired, e.g. Height = 23 mm, Material no. R900058716 or alternatively a 90° plate: Height = 40 mm, Material no. R900241813

Pump safety block Size 16 Size 25 Size 32

Port P SAE 3/4“ SAE �“ SAE � �/4“

Pum

p ty

pe

– Variable displacement pump

Type A�0VO, series 3� to RE 9270� A�0VO28 –

A�0VO45 A�0VO7�

A�0VO�00 A�0VO�40

Type A�0VO, series 5X to RE 92703 A�0VO28 –

A�0VO45 A�0VO60

A�0VO�00 A�0VO�40

Type A�0VSO, series 3� to RE 927�� – A�0VSO45 A�0VSO7�

Type A�0VSO, series 3� to RE 927�2 A�0VSO�8 A�0VSO7� –

Type A�0VSO, series 32 to RE 927�4 – A�0VSO7� –

– Internal gear pump

Type PGH4, component series 2X to RE �0223 – – PGH4-2X/063

Type PGF3, component series 3X to RE �02�3 �) PGF3-3X/020 PGF3-3X/022 PGF3-3X/025 PGF3-3X/032 PGF3-3X/040

– – – – –

– – – – –

Type PGP3, component series 3X to RE �023� �) PGP3-3X/020 PGP3-3X/022 PGP3-3X/025 PGP3-3X/032

– – – –

– – – –

– Vane pump 2)

Type PV7, component series �X to RE �05�5 – –

– –

PV7-�X/63-7� PV7-�X/63-94



Permissible pumps: High-pressure flange (5000 psi)

�) Mounting the pressure switch directly opposite to pressure relief cartridge valve type DB 20 K is impossible!

Pump safety block Size 16 Size 25 Size 32

Port P SAE 3/4“ SAE �“ SAE � �/4“

Pum

p ty

pe

– Fixed displacement pump

Type A2FO, series 6 to RE 9�40� A2FO45 A2FO56 A2FO63

– –

A2FO80 A2FO90 A2FO�07

– –

A2FO�25 A2FO�60 A2FO�80 A2FO200 A2FO250

Type A4FO, series � to RE 9�455 – A4FO7� –

Type A4FO, series 3 to RE 9�455 A4FO�6 A4FO22

– –

A4FO�25 –

– Variable displacement pump

Type A4SFO, series � to RE 92050 A4VSO40 A4VSO7� –

Type A4SFO, series 3 to RE 92050 – –

– –

A4VSO�25 A4VSO�80

Type A��VO, series � to RE 92500 A��VO40 A��VO60

–

A��VO75 A��VO95 A��VO�30

A��VLO�30 – –

Type A�0VSO, series 3� to RE 927�� Type A�0VSO, series 32 to RE 927�4

– –

– –

A�0VSO�00 A�0VSO�40

Type A�0VSO, series 3� to RE 9270� – –

– –

A�0VO�00 A�0VO�40

Type A�0VO, series 5X to RE 92703 �) – – A�0VO85

Type A7VO, series 6 to RE 92202 �) A7VO55 –

A7VO80 A7VO�07

A7VO�60 –

Type A7VO, series 6 to RE 92203 �) – – A7VO250

– Variable displacement double pump

Type A8VO, series 6X to RE 930�0 A8VO28 A8VO55

–

A8VO80 A8VO�07 A8VO�40

A8VO200 – –

– Internal gear pump

Type PGH4 and 5, component series 2X to RE �0223

PGH4-2X/020 PGH4-2X/025 PGH4-2X/032 PGH4-2X/040

PGH4-2X/050 PGH5-2X/063

– –

PGH5-2X/080 PGH5-2X/�00 PGH5-2X/�25

–



Ordering code: Type-tested safety valves of type DBA…E, component series 2X according to Pressure Equipment Directive 97/23/EC

Size Type designation Component identification

Permissible max. flow qVmax

in l/min

with pilot oil drain

Set re-sponse

pressure p in bar

16

DBA �5 2

3

4

2X/ 5

6

7

E

TÜV.SV. –�00�.�4,4.F.G.p

60

�00

�50

200

250

30 to 60

6� to ��0

�� to 2�0

2�� to 3�5

3�6 to 350

DBAW �5 �

2

3

4

2X/ 5

6

6 * 7

E

DBAE �5 �

2

3

4

2X/ 5

6

6 * 7

E

DBAEE �5 �

2

3

4

2X/ 5

6

6 * 7

E

25

DBA 25 2

3

4

2X/ 5

6

7

E

TÜV.SV. –�00�.�4,4.F.G.p

70

�00

�50

200

300

30 to 60

6� to ��0

�� to 2�0

2�� to 3�5

3�6 to 350

DBAW 25 �

2

3

4

2X/ 5

6

6 * 7

E

DBAE 25 �

2

3

4

2X/ 5

6

6 * 7

E

DBAEE 25 �

2

3

4

2X/ 5

6

6 * 7

E

32

DBA 30 2

3

4

2X/ 5

6

7

E

TÜV.SV. –�00�.�4,4.F.G.p

70

�00

�50

200

300

30 to 60

6� to ��0

�� to 2�0

2�� to 3�5

3�6 to 350

DBAW 30 �

2

3

4

2X/ 5

6

6 * 7

E

DBAE 30 �

2

3

4

2X/ 5

6

6 * 7

E

DBAEE 30 �

2

3

4

2X/ 5

6

6 * 7

E

� Directional valve, normally closed

Directional valve, normally open

= A

= B

2 Standard flange (3000 psi)

High-pressure flange (5000 psi)

= F

= H

3 Adjustment element, hand wheel

(Pressure setting lead-sealed, unloading or setting of a lower response pressure is possible!)

= 1

Adjustment element with lead-sealed protective cap (adjustment/unloading impossible)

= 2

4 With built-on pressure switch type HED 8 OH… (without mating connector)

Without pressure switch

= D

= –

5 The customer must enter the pressure in the designation; pressure settings ≥ 30 bar and in 5-bar increments are possible.

e.g. = 150

Important safety notes, see page 24!

6 2nd/3rd pressure relief function (ordering code according to symbols on pages 6 to 8)

Without additional pressure relief valve

With built-on pressure relief valve (Z, ZZ), see ordering code on page 3 (types DBAW…Z(Z)E and DBAE(E)…E only possible in con-junction with ordering code A00, A08 or A�0)

= No code

*For ordering code of electrical data, see page 3

e.g. = EG24N9K4

7 NBR seals

FKM seals

= No code

= V

Details entered in the factory



Safety notes: Type-tested safety valves of type DBA…E, component series 2X according to Pressure Equipment Directive 97/23/EC

– Before ordering a type-tested safety valve, please note that at the requested response pressure p the permissible max-imum flow qVmax is greater than the possible maximum flow of the system to be protected.

Observe the relevant regulations!

– According to PED 97/23/EC the increase in the system pressure caused by the flow must not exceed �0 % of the set response pressure (see component identification).

The specified permissible maximum flow qVmax (= figure in the place of letter “G“ in the component identification, see page 23) must not be exceeded.

– The outlet of return lines from safety valves must be free from any hazards. No fluid is allowed to collect in the return lines.

– When a seal is removed from the safety valve, the approval according to the PED becomes invalid!

– Generally observe the requirements laid down in Pressure Equipment Directive 97/23 EC and AD2000 sheet A2 !

– The options DBAE/DBAEE or 2nd/3rd pressure relief func-tion ( 6 ) are only possible in conjunction with pressure relief valves for variable displacement pumps (see also page 3).

– The unloading function (DBAW../DBAE../DBAEE..) must not be used for safety functions!

– The unloading function, which is realized by means of the directional valve, must not be used for safety-relevant tasks! If an unloading function is required for safety-relevant tasks, an additional unloading valve must be installed.

Strictly observe the application notes!

– The response pressure specified in the component identifi-cation is factory-set at a flow of 2 l/min.

– The permissible maximum flow indicated in the component identification is valid for applications without backpressure in the return line (port T).

Attention! As the flow increases, the system pressure rises by the back-pressure in the return line (port T) (observe AD2000 sheet A2, section 6.3).

In order to prevent this increase in the system pressure caused by the flow from exceeding �0 % of the set response pressure, the permissible flow must be reduced in dependence on the backpressure in the return line (port T) (see the following dia-grams on pages 25 and 26).

Deviating technical data: Type-tested safety valves of type DBA…E, component series 2X according to Pressure Equipment Directive 97/23/EC 1)

HydraulicMaximum flow See table on page 23 and characteristic curves on pages 25

and 26

Hydraulic fluid Mineral oil (HL, HLP) to DIN 5�524 and DIN 5�524-2

Hydraulic fluid temperature range °C –20 to +60 (NBR seals) –�5 to +60 (FKM seals)

Viscosity range mm2/s �2 to 230

�) for applications outside these parameters, please consult us!


0

11

21,5

3

6,56

11,5

21

31,5

100 20050 150 250

35

32

2

8

7

65

43

1

910

15,75

0

100

200

350

300

60



Permissible maximum flow qVmax in dependence on backpressure pT in the return line with internal pilot oil drain

Type DBA 15 …-2X/…E

pA in bar pT in bar

Flow qVmax in l/min →

Char-acter-istic

curves

Re-sponse pres-sure

pA in bar

1 30

2 60

3 65

4 ��0

5 ��5

6 2�0

7 2�5

8 3�5

9 320

10 350

Characteristic curves for interme-diate values can be generated by way of interpola-tion. For further explanations, see below.

pA = Response pressure in bar

pT = Permissible maximum backpressure in the return line in bar (port T) (sum of all backpressures pos-sible; see also AD2000 sheet A2)

pT max = �0% x pA (at qV = 0) to PED 97/23/EC

qV max = Permissible maximum flow in l/min

Explanation of diagrams (Example: Type DBA �5…E):

Given: – System/accumulator flow to be safeguarded qVmax = �00 l/min

– Set response pressure of the safety valve pA = 3�5 bar

Required: pTpermissible

Solution: See arrows on the diagram above

pTpermissible (�00 l/min; 3�5 bar) = �5.75 bar


0

11

21,5

3

6,56

11,5

21

31,5

100 200 30070 150 250

35

32

0

100

200

350

300

1 23

45

67

8

9 10

Bosch Rexroth AG HydraulicsZum Eisengießer �978�6 Lohr am Main, Germany Phone +49 (0) 93 52 / �8-0 Fax +49 (0) 93 52 / �8-23 [email protected] www.boschrexroth.de

© This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent.The data specified above only serve to describe the product. No state-ments concerning a certain condition or suitability for a certain application can be derived from our information. The information given does notrelease the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.



pA = Response pressure in bar

pT = Permissible maximum backpressure in the return line in bar (port T) (sum of all backpressures possi-ble; see also AD2000 sheet A2)

pT max = �0% x pA (at qV = 0) to PED 97/23/EC

qV max = Permissible maximum flow in l/min

Permissible maximum flow qVmax in dependence on backpressure pT in the return line with internal pilot oil drain

Type DBA 25 …-2X/…E and type DBA 30 …-2X/…E

pA in bar pT in bar

Flow qVmax in l/min →

Char-acter-istic

curves

Re-sponse pres-sure

pA in bar

1 30

2 60

3 65

4 ��0

5 ��5

6 2�0

7 2�5

8 3�5

9 320

10 350

Characteristic curves for interme-diate values can be generated by way of interpola-tion. For further explanations, see page 25.





Notes


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