1/10
Information on available spare parts:
www.boschrexroth.com/spc
Pressure relief valve,
pilot operated
Type ZDB and Z2DB
Size 10
Component series 4X
Maximum operating pressure 315 bar [4600 psi]
Maximum flow 100 l/min [26.4 US gpm]
RE 25761/05.11
Replaces: 02.03
Table of contents Features
– Sandwich plate valve
– Porting pattern according to ISO 4401-05-04-0-05
and NFPA T3.5.1 R2-2002 D05
– 4 pressure ratings
– 6 circuit options
– With 1 or 2 pressure valve cartridges
– 4 adjustment types for pressure adjustment, optional:
•Rotaryknob
•Bushingwithhexagonandprotectivecap
•Lockablerotaryknobwithscale
•Rotaryknobwithscale
Contents Page
Features 1
Ordering code 2
Symbols 3
Function, section 4
Technical data 5
Characteristic curves 6
Unit dimensions 7 to 10
H7747
Inhalt
Table of contents 1
Features 1
Ordering code 2
Symbols (
1
= component side,
2
= plate side) 3
Function, section 4
Technical Data (For applications outside these parameters,
please consult us!) 5
Characteristic curves(measuredwithHLP46,ϑ
Oil
= 40 ± 5 °C
[104 ± 9 °F]) 6
Unit dimensions: TypeZDB10VA,VPandVT(dimensions in
mm [inch]) 7
Unit dimensions: TypeZDB10VB(dimensions in mm [inch]) 8
Unit dimensions: TypeZ2DB10VCandVD(dimensions in
[inch]) 9
Unit dimensions 10
Notes 11
Notes 12
2/10 Bosch Rexroth AG Hydraulics
ZDB; Z2DB RE 25761/05.11
Ordering code
Further details in the plain text
Seal material
No code = NBRseals
V = FKM seals
(other seals upon request)
Attention!
Observe compatibility of seals with hy-
draulic fluid used!
50
= Setting pressure up to 50 bar [725 psi]
100
= Setting pressure up to 100 bar [1450 psi]
200
= Setting pressure up to 200 bar [2900 psi]
315
= Setting pressure up to 315 bar [4600 psi]
4X
= Component series 40 to 49
(40 to 49: Identical installation and
connection dimensions)
Adjustment type for pressure adjustment
1
= Rotaryknob
2
= Bushingwithhexagonandprotectivecap
3
= Lockablerotaryknobwithscale
1)
7
= Rotaryknobwithscale
Z DB 10 4X
*
1)
H-keywithMaterialno.R900008158 is included in
the delivery
Note!
To port X and Y bored according to ISO 4401-05-05-0-05
(e.g. for pilot operated directional valve size 10), version
"SO30" at the end of the ordering code applies!
Sandwich plate = Z
1 pressure valve cartridge = No code
(Onlywithversion"VA","VB","VT"and
"VP")
2 pressure valve cartridges = 2
(Onlywithversion"VC"and"VD")
Pressure relief valve = DB
Size 10 = 10
Relief function from - to:
A – TA = VA
P – TA = VP
TB1–TA2 = VT
B–TB = VB
A–TAandB–TB = VC
A–BandB–A = VD
Standard types and standard units are contained in the
EPS (standard price list).
Hydraulics Bosch Rexroth AG
RE 25761/05.11 ZDB; Z2DB
3/10
Symbols (
1
= component side,
2
= plate side)
Type ZDB 10 VA… Type ZDB 10 VB…
TA TBPAB
1
2
TA TBPAB
1
2
Type ZDB 10 VP… Type ZDB 10 VT…
TA TBPAB
1
2
TA TBPAB
1
2
Type Z2DB 10 VC… Type Z2DB 10 VD…
TA TBPAB
1
2
TA TBPAB
1
2
Note!
Deviating from ISO 4401, port T is in this data sheet called
TA,portT1iscalledTB.
APBTBTA
APBTBTA
1
2
4 65 3 8 127
4/10 Bosch Rexroth AG Hydraulics
ZDB; Z2DB RE 25761/05.11
Function, section
PressurevalvesoftypeZDBandZ2DBarepilotoperated
pressure relief valves in sandwich plate design. They are
used for limiting a system pressure. The valves basically con-
sist of a housing (7) and one or two pressure valve cartridges.
The system pressure can be set via the adjustment type (4).
In the initial position the valves are closed. The pressure in
channel A acts on the spool (1). At the same time, the pres-
sure is applied to the spring-loaded side of the spool (1) via
nozzle (2) and to the pilot poppet (6) via nozzle (3). If the
pressure in channel A exceeds the value set at the spring (5),
the pilot poppet (6) opens. Hydraulic fluid flows from the
spring-loaded side of the spool (1), nozzle (3) and channel (8)
into the channel T (TA). The resulting pressure drop moves
the spool (1) and opens the connection A to T (TA). In chan-
nel A, the pressure set at the spring (5) is set.
Type ZDB 10 VA2-4X/…V
①=componentside
②=plateside
Hydraulics Bosch Rexroth AG
RE 25761/05.11 ZDB; Z2DB
5/10
Technical Data (For applications outside these parameters, please consult us!)
general
Weight
–TypeZDB
kg[lbs] Approx. 2.4 [5.3]
–TypeZ2DB
kg[lbs] Approx. 2.6 [5.7]
1)
The cleanliness classes stated for the components need
to be maintained in hydraulic systems. Effective filtration
prevents faults and at the same time increases the service
life of the components.
For the selection of the filters see
www.boschrexroth.com/filter.
hydraulic
Maximum operating pressure
bar [psi] 315 [4600]
Maximum setting pressure
bar [psi] 50 [725]; 100 [1450]; 200 [2900]; 315 [4600]
Maximum flow
l/min [US gpm] 100 [26.4]
Hydraulic fluid See table below
Hydraulic fluid temperature range
°C [°F] –20 to +80 [–4 to +176]
Viscosityrange
mm
2
/s [SUS] 10 to 800 [60 to 3710]
Maximum permitted degree of contamination of the hydraulic fluid -
cleanliness class according to ISO 4406 (c)
Class 20/18/15
1)
Hydraulic fluid Classification Suitable sealing materials Standards
Mineral oils and related hydrocarbons HL,HLP,HLPD NBR,FKM DIN 51524
Environmentally
compatible
– Insoluble in water
HETG NBR,FKM
ISO 15380
HEES FKM
– Soluble in water HEPG FKM ISO 15380
Flame-resistant
– Water-free HFDU, HFDR FKM ISO 12922
– Water-containing
HFC (Fuchs Hydrotherm 46M,
Petrofer Ultra Safe 620)
NBR ISO 12922
Important information on hydraulic fluids!
– For more information and data on the use of other hydrau-
lic fluids refer to data sheet 90220 or contact us!
– There may be limitations regarding the technical valve
data (temperature, pressure range, service life, mainte-
nance intervals, etc.)!
– Flame-resistant – water-containing:
• Maximumoperatingpressure210bar
• Maximumhydraulicfluidtemperature60°C
• ExpectedservicelifeascomparedtoHLPhydraulicoil
30 % to 100 %
40 60
350
300
250
200
150
100
50
0
02080 100
[5]
[0]
[10] [15] [20] [26.4]
[0]
[1000]
[2000]
[3000]
[4000]
[5076]
20
15
10
5
0
020406080 100
25
3
2
1
4
[5]
[0]
[10] [15] [20] [26.4]
[0]
[50]
[100]
[150]
[200]
[363]
[250]
[300]
6/10 Bosch Rexroth AG Hydraulics
ZDB; Z2DB RE 25761/05.11
The characteristic curves apply to the pressure at the valve
output p = 0 bar across the entire flow range.
Flow in l/min [US gpm]
→ Flow in l/min [US gpm] →
1 VD(AtoB)
2 VA
3 VB,VC,VT
4 VP,VD(BtoA)
Setting pressure in bar [psi] →
Minimum setting pressure in
bar [psi]
→
p
E
-q
V
characteristic curves p
E min
-q
V
characteristic curves
Characteristic curves(measuredwithHLP46,ϑ
Oil
= 40 ± 5 °C [104 ± 9 °F])
L3
L2
L1
18
50
1,5
L4
H
4 x 6,7
B1
L5
48,5
15,7
H
12
30
35
645
15 12
7
10 11
8
2 1 9 8
3
0
32
TA
A
P
B
TB
L6
15 13
23
9
F1
F2
F3
F4
14
B2
L7
B3
2
[0.7]
[ 1.26]
[0.059]
[1.969]
[1.909]
[ 0.618]
[ 0.181]
[
1.378]
[2.008]
51
[0.47]
[ 0.264]
[0.0787]
1,5
[0.059]
2
1
1
Hydraulics Bosch Rexroth AG
RE 25761/05.11 ZDB; Z2DB
7/10
Unit dimensions: TypeZDB10VA,VPandVT(dimensions in mm [inch])
Type B1 B2 B3 H L1 L2 L3 L4 L5 L6 L7
VA and VP 69
[2.72]
11.5
[0.45]
20.7
[0.82]
26
[1.02]
227
[8.94]
203
[7.99]
117
[4.61]
57.6
[2.27]
50.3
[1.98]
4
[0.16]
45.5
[1.79]
VT 70
[2.76]
12
[0.47]
27
[1.06]
25
[0.98]
218
[8.58]
194
[7.64]
105
[4.13]
60.9
[2.40]
53.6
[2.11]
0.7
[0.027]
32.5
[1.28]
Item explanations and valve mounting screws see page 10.
Notes!
– To port X and Y bored according to ISO 4401-05-05-0-05
(e.g. for pilot operated directional valve size 10), version
"SO30" at the end of the ordering code applies!
– Deviating from ISO 4401, port T is in this data sheet called
TA,portT1iscalledTB.
Required surface quality of
the valve mounting face
117
203
227
18
50
1,5
58
26
4 x 6,7
69
50
10,5
51
12
30
35
6451
15
7
1011
8
2 1 0 9 8
3
32
TA
A
P
B
TB
4
15
23
9
F1
F2
F3
F4
28
11,5
18,5
20,7
[8.94]
[7.99]
[4.606]
[1.969]
[0.059]
[ 0.413]
[ 1.26]
[0.7]
[1.024]
[
1.181]
[2.28]
[0.728]
[0.157]
[0.453][0.815]
[2.717]
[ 0.264]
[1.1] [1.97]
[0.47]
[2.01]
[
1.378]
2
[0.0787]
2
1
0,01/100
[0.0004/4.0]
Rzmax 4
8/10 Bosch Rexroth AG Hydraulics
ZDB; Z2DB RE 25761/05.11
Unit dimensions: TypeZDB10VB(dimensions in mm [inch])
Required surface quality of
the valve mounting face
Item explanations and valve mounting screws see page 10.
Notes!
– To port X and Y bored according to ISO 4401-05-05-0-05
(e.g. for pilot operated directional valve size 10), version
"SO30" at the end of the ordering code applies!
– Deviating from ISO 4401, port T is in this data sheet called
TA,portT1iscalledTB.
2 1 0 9 8
3
2 1 9 8
3
0
L7
L6
L1
L3
336
18
26
1,5
10,5
15,7
L5
L2
18
L4
6
15
45 1456
10
L10
L8
30
4 x 6,7
69,5
L11 L9
33
7
2
8
3
9
2
8
3
15
5112
35
11,8
F1
F2
F3
F4
AB
P
TA TB
20,7
50
[13.23]
[0.7] [0.7]
[1.024]
[1.969]
[0.059]
[ 0.413]
[
0.618]
[ 1.181]
[
1.378]
[1.299]
[0.47]
[ 0.264]
[2.01]
[0.465]
[0.81]
[2.74]
2
[0.0787]
2
1
0,01/100
[0.0004/4.0]
Rzmax 4
Hydraulics Bosch Rexroth AG
RE 25761/05.11 ZDB; Z2DB
9/10
Unit dimensions: TypeZ2DB10VCandVD(dimensions in [inch])
Type L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11
VC 123
[4.84]
111
[4.37]
112
[4.40]
89
[3.50]
90
[3.54]
59
[2.32]
60
[2.36]
52
[2.05]
53
[2.09]
2
[0.08]
1
[0.04]
VD 132
[5.20]
107
[4.20]
112
[4.40]
85
[3.30]
90
[3.54]
56
[2.20]
56
[2.20]
49
[1.93]
49
[1.93]
6
[0.24]
6
[0.24]
Required surface quality of
the valve mounting face
Item explanations and valve mounting screws see page 10.
Notes!
– To port X and Y bored according to ISO 4401-05-05-0-05
(e.g. for pilot operated directional valve size 10), version
"SO30" at the end of the ordering code applies!
– Deviating from ISO 4401, port T is in this data sheet called
TA,portT1iscalledTB.
BoschRexrothAG
Hydraulics
Zum Eisengießer 1
97816LohramMain,Germany
Phone +49 (0) 93 52 / 18-0
Fax +49 (0) 93 52 / 18-23 58
documentation@boschrexroth.de
www.boschrexroth.de
© This document, as well as the data, specifications and other informa-
tionsetforthinit,aretheexclusiveproperty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 applica-
tion can be derived from our information. The information given does not
release 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.
10/10 Bosch Rexroth AG Hydraulics
ZDB; Z2DB RE 25761/05.11
Unit dimensions
1 Name plate
2 Adjustment type "1"
3 Adjustment type "2"
4 Adjustment type "3"
5 Adjustment type "7"
6 Dimensionsrequiredtoremovethekey
7 Valvemountingbores
8 LocknutSW24
9 Hexagon SW10
10 IdenticalsealringsforportsA,B,P,TA,TB(plate side)
11
Sealing plate 80 x 70 x 1.5 [2.76 x 3.15 x 0.06] (only with
version"VA"and"VP")
12 Counterbore(onlywithversion"VT")
13 Version"VA"and"VP"
14 Version"VT"
15 Hexagon SW30, tightening torque M
A
= 50 Nm
[36.8 ft-lbs]
① Component side – porting pattern according to
ISO 4401-05-04-0-05 and NFPA T3.5.1 R2-2002 D05
② Component side – porting pattern according to
ISO 4401-05-04-0-05 and NFPA T3.5.1 R2-2002 D05
Valve mounting screws (separate order)
4 hexagon socket head cap screws
metric
ISO 4762 - M6 - 10.9-flZn-240h-L
4 hexagon socket head cap screws 1/4-20 UNC
Note!
Lengthandtighteningtorqueofthevalvemountingscrews
must be calculated according to the components mounted un-
der and over the sandwich plate valve.
BoschRexrothAG
Hydraulics
Zum Eisengießer 1
97816LohramMain,Germany
Phone +49 (0) 93 52 / 18-0
Fax +49 (0) 93 52 / 18-23 58
documentation@boschrexroth.de
www.boschrexroth.de
© This document, as well as the data, specifications and other informa-
tionsetforthinit,aretheexclusiveproperty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 applica-
tion can be derived from our information. The information given does not
release 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.
Hydraulics Bosch Rexroth AG
RE 25761/05.11 ZDB; Z2DB
11/10
Notes
BoschRexrothAG
Hydraulics
Zum Eisengießer 1
97816LohramMain,Germany
Phone +49 (0) 93 52 / 18-0
Fax +49 (0) 93 52 / 18-23 58
documentation@boschrexroth.de
www.boschrexroth.de
© This document, as well as the data, specifications and other informa-
tionsetforthinit,aretheexclusiveproperty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 applica-
tion can be derived from our information. The information given does not
release 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.
12/10 Bosch Rexroth AG Hydraulics
ZDB; Z2DB RE 25761/05.11
Notes