Electric Drives
and Controls Hydraulics
Linear Motion and
Assembly Technologies Pneumatics
Service
1/8
Table of contents
Contents Page
Features 1
Ordering details 2
Standard types 2
Symbols 3
Function, section 3
Technical data 4
Characteristic curves 4
Unit dimensions 5 to 7
RA 25761/02.03
Replaces: 06.98
Pressure relief valve,
pilot operated
Features
– Sandwich plate valve
– Porting pattern to ISO 4401-3, NFPA T3.5.1M R1 and
ANSI B93.7 D 05
– 4 pressure stages
– 6 circuit options
– With 1 or 2 pressure relief cartridges
– 4 adjustment elements:
• Rotary knob
• Sleeve with hexagon and protective cap
• Lockable rotary knob with scale
• Rotary knob with scale
Nominal size 10
Series 4X
Maximum operating pressure 315 bar (4600 PSI)
Maximum flow 100 L/min (26.4 GPM)
Models ZDB and Z2DB
2/8 Bosch Rexroth Corp. | Industrial Hydraulics ZDB and Z2DB | RE 25761/02.03
Further details in clear text
V = FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fl uid has to be taken into account!
50 = Settable pressure up to 50 bar (725 PSI)
100 = Settable pressure up to 100 bar (1450 PSI)
200 = Settable pressure up to 200 bar (2900 PSI)
315 = Settable pressure up to 315 bar (4600 PSI)
4X = Series 40 to 49
(40 to 49: unchanged installation and connection dimensions)
Adjustment element
1 = Rotary knob
2 = Sleeve with hexagon and protective cap
3 = Lockable rotary knob with scale
1)
7 = Rotary knob with scale
Sandwich plate = Z
With 2 pressure valve cartridges = 2
(only for versions VC and VD)
Pressure relief valve = DB
Nominal 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
Ordering details
1)
H-key to Material No. R900008158 is included
within the scope of supply
Z DB 10 – 4X V
*
Standard types
Type Material No.
ZDB 10 VA2-4X/50V
R900423244
ZDB 10 VA2-4X/100V
R900424537
ZDB 10 VA2-4X/315V
R900409955
ZDB 10 VB2-4X/50V
R900425723
ZDB 10 VB2-4X/100V
R900409951
ZDB 10 VB2-4X/315V
R900409956
ZDB 10 VP2-4X/50V
R900422752
ZDB 10 VP2-4X/100V
R900409959
ZDB 10 VP2-4X/315V
R900409958
Z2DB 10 VC2-4X/50V
R900441974
Z2DB 10 VC2-4X/100V
R900425700
Z2DB 10 VC2-4X/315V
R900411430
RE 25761/02.03 | ZDB and Z2DB Industrial Hydraulics | Bosch Rexroth Corp. 3/8
TA TBPAB
1
2
TA TBPAB
1
2
TA TBPAB
1
2
TA TBPAB
1
2
TA TBPAB
1
2
TA TBPAB
1
2
A2 P2 B2 TB2TA2
A1 P1 B1 TB1TA1
4653812 7
Type ZDB 10 VA..
Type ZDB 10 VP..
Type Z2DB 10 VC..
Type ZDB 10 VB..
Type Z2DB 10 VT..
Type Z2DB 10 VD..
Functional description, cross-section
Pressure valves types ZDB and Z2DB are pilot operated pressure
relief valves of sandwich plate design. They are used to limit
the pressure within a hydraulic system. They basically consist
of the housing (7) together with one or two pressure relief valve
cartridges. The system pressure is set by means of the adjustment
element (4).
At rest, the valve is closed. Pressure in port A acts on the spool
(1). At the same time pressure is applied via orifi ce (2), on to the
sp ring loa ded side of the spool (1) and via orifi ce (3) on to the
pilot poppet (6). If the pressure in port A rises above the value
set on spring (5), then the pilot poppet (6) opens. Fluid can now
fl ow from the spring loa ded side of spool (1), orifi ce (3) and
channel (8) into port T. The resulting pressure drop moves the
spool (1) causing this to open the connection from A to T, while
the pressure set at spring (5) is maintained.
Pilot oil return from the two spring chambers is taken externally
via port T.
Type ZDB 10 VA2-4X/…V
Symbols ( = valve side, = subplate side)
12
4/8 Bosch Rexroth Corp. | Industrial Hydraulics ZDB and Z2DB | RE 25761/02.03
350 (5076)
300 (4351)
250
200
150
50
100
(3626)
(2900)
(2175)
(1450)
(725)
(5.28) (10.56) (15.85) (21.13) (26.4)
0 20 40 60 80 100
20
15
10
5
25
3
5
2
1
4
(5.28) (10.56) (15.85) (21.13) (26.4)
0 20 40 60 80 100
(362.6)
(290)
(217.5)
(145)
(72.5)
Pressure fl uid Mineral oil (HL, HLP) to DIN 51 524;
Fast bio-degradable pressure fl uids to
VDMA 24 568 (also see RE 90 221); HETG (rape seed oil);
HEPG (polyglycols); HEES (synthetic ester);
Other pressure fl uids on request
Pressure fl uid temperature range °C (°F) –20 to +80 (-4 to 176)
Viscosity range mm2/s (SUS) 10 to 800 (60 to 3710)
ISO code cleanliness class Maximum permissible degree of contamination of the pressure
fl uid is to ISO 4406 (C) class 20/18/15
1)
Maximum operating pressure bar (PSI) 315 (4600)
Maximum settable pressure bar (PSI) 50; 100; 200; 315 (725; 1450; 2900; 4600)
Maximum fl ow L/min (GPM) 100 26.4)
Weight Type ZDB 10 kg (lbs) Approx. 2.4 (5.3)
Type Z2DB 10 kg (lbs) Approx. 2.6 (5.7)
Technical data (for applications outside these parameters, please consult us!)
Characteristic curves – measured with HLP46, ϑ
oil
= 40 °C ± 5 °C (104 °F ±41 °F)
1)
The cleanliness class stated for the components must be adhered to in hydraulic systems. Effective fi ltration prevents faults
from occurring and at the same time increases the component service life.
For the selection of fi lters see catalogue sheets:
RE 50 070, RE 50 076 and RE 50 081.
The characteristic curves are valid for the outlet pressure =
zero over the entire fl ow range!
Flow in L/min (GPM) → Flow in L/min (GPM) →
1 VD (A to B)
2 VA
3 VB, VC
4 VP, VD (B to A)
Settable pressure in bar (PSI)→
Lowest settable pressure in bar (PSI)→
p
E
-q
V
-characteristic curves p
E min
-q
V
-characteristic curves
RE 25761/02.03 | ZDB and Z2DB Industrial Hydraulics | Bosch Rexroth Corp. 5/8
VA and VP VT
B
69 (2.72) 70 (2.76)
H
26 (1.02) 25 (0.98)
L1
227 (8.94) 218 (8.58)
L2
203 (7.99) 194 (7.64)
L3
117 (4.61) 105 (4.13)
L4
57.6 (2.27) 60.9 (2.40)
L5
50.3 (1.98) 53.6 (2.11)
L6
4 (0.16) 0.7 (0.028)
L7
41.5 (1.63) 31.8 (1.25)
L3
L2
L1
18 (0.7)
50 (1.969)
1.5 (0.059)
54 (2.126)
L4
H
50.8 (2)
4 x Ø 6.7 (0.264)
46 (1.811)
B
P
A
B
TB
TA
L7L5
L6
48.5 (1.909)
Ø 15.7 (0.618)
H
51 (2.008)
27 (1.063)
12
(0.47)
Ø 30 (0.181)
Ø 35
(1.378)
645
1
15 12 710 11
2
8
3
9
13
14
21 098
3
Ø 32 (1.26)
1.5 (0.059)
Unit dimensions: types ZDB 10 VA, VP and VT – dimensions in mm (inches)
0.0004/4.0 in
0.01/100 mm
(R
max
4)
Required surface fi nish of
the mating piece
1 Name plate
2 Adjustment element "1"
3 Adjustment element "2"
4 Adjustment element "3"
5 Adjustment element "7"
6 Space required to remove the key
7 Valve fi xing holes
8 Locknut 24A/F
9 Hexagon 10A/F
10 Identical seal rings
for ports A2, B2, P2, TA2, TB2
11 Seal plate 70 x 80 x 1.5 (2.76 x 3.15 x 0.06)
(only for versions VA and VP)
12 Counter bores (only for version VT)
13 Versions ZDB 10 VA and VP
14 Version ZDB 10 VT
15 Hexagon 30A/F,
tightening torque M
A
= 50 Nm (36.8 lb-ft)
Valve fi xing screws
M6 DIN 912-10.9 (1/4-20 UNC),
tightening torque M
A
= 15.5 Nm (11.43 lb-ft),
must be ordered separately.
For X and Y ports (e.g. for NS 10 pilot
operated directional valves) the special
version SO30 is required!
6/8 Bosch Rexroth Corp. | Industrial Hydraulics ZDB and Z2DB | RE 25761/02.03
117 (4.606)
203 (7.99)
227 (8.94)
18 (0.7)
50 (1.969)
1.5 (0.059)
54 (2.126)
Ø 35 (1.378)
26
(1.024)
4 x Ø 6.7 (0.264)
69 (2.717)
P
A
B
TB
TA
28 (1.1)
50 (1.97)
4 (0.157)
Ø 10.5 (0.413)
51 (2.01)
20.7 (0.815)
Ø 32 (1.26)
12
(0.47)
41.5 (1.634)
46 (1.811)
645
1
1571011
2
8
3
9
58 (2.28)
Ø 30 (1.181)
21 098
3
1 Name plate
2 Adjustment element "1"
3 Adjustment element "2"
4 Adjustment element "3"
5 Adjustment element "7"
6 Space required to remove the key
7 Valve fi xing holes
8 Locknut 24A/F
9 Hexagon 10A/F
10 Identical seal rings
for ports A2, B2, P2, TA2, TB2
11 Seal plate 70 x 80 x 1.5 (2.76 x 3.15 x 0.06)
15 Hexagon 30A/F,
tightening torque M
A
= 50 Nm (36.8 lb-ft)
Valve fi xing screws
M6 DIN 912-10.9 (1/4-20 UNC),
tightening torque M
A
= 15.5 Nm (11.43 lb-ft),
must be ordered separately.
For X and Y ports (e.g. for NS 10 pilot
operated directional valves) the special
version SO30 is required!
Unit dimensions: type ZDB 10 VB – dimensions in mm (inches)
0.0004/4.0 in
0.01/100 mm
(R
max
4)
Required surface fi nish of
the mating piece
RE 25761/02.03 | ZDB and Z2DB Industrial Hydraulics | Bosch Rexroth Corp. 7/8
VC VD
L1
123 (4.84) 132 (5.20)
L2
111 (4.37) 107 (4.20)
L3
112 (4.40) 112 (4.40)
L4
89 (3.50) 85 (3.30)
L5
90 (3.54) 90 (3.54)
L6
59 (2.32) 56 (2.20)
L7
60 (2.36) 56 (2.20)
L8
52 (2.05) 49 (1.93)
L9
53 (2.09) 49 (1.93)
L10
2 (0.08) 6 (0.24)
L11
1 (0.04) 6 (0.24)
21 098
3
21 098
3
Ø 35
(1.378)
L10L8
L7
Ø 30 (1.181)
L6
Ø 30 (1.181)
L1
L3
336 (13.23)
18
26 (1.024)
1.5 (0.059)
54 (2.126)
20.7
(0.81)
4 x Ø 6.7 (0.264)
46 (1.811)
69.5 (2.74)
L11
Ø 10.5 (0.413)
51 (2.01)
12
L9
Ø 15.7 (0.618)
L5
L2
18
L4
87 (3.43)
33 (1.299)
P
A
B
TB
TA
6
15
7
2
8
3
9
45
10
2
8
3
15
1 5 4 6
(0.7)
(0.47)
(0.7)
Unit dimensions: types Z2DB 10 VC and VD – dimensions in mm (inches)
1 Name plate
2 Adjustment element "1"
3 Adjustment element "2"
4 Adjustment element "3"
5 Adjustment element "7"
6 Space required to remove the key
7 Valve fi xing holes
8 Locknut 24A/F
9 Hexagon 10A/F
10 Identical seal rings
for ports A2, B2, P2, TA2, TB2
15 Hexagon 30A/F,
tightening torque M
A
= 50 Nm (36.8 lb-ft)
Valve fi xing screws
M6 DIN 912-10.9 (1/4-20 UNC),
tightening torque M
A
= 15.5 Nm (11.43 lb-ft),
must be ordered separately.
For X and Y ports (e.g. for NS 10 pilot
operated directional valves) the special
version SO30 is required!
0.0004/4.0 in
0.01/100 mm
(R
max
4)
Required surface fi nish of
the mating piece
8/8 Bosch Rexroth Corp. | Industrial Hydraulics ZDB and Z2DB | RE 25761/02.03
Notes
Bosch Rexroth Corp.
Industrial Hydraulics
2315 City Line Road
Bethlehem, PA 18017-2131
USA
Telephone (610) 684-8300
Facsimile (610) 694-8467
www.boschrexroth-us.com
© This document, as well as the data, specifi cations and other
information set forth in it, are the exclusive property of Bosch Rexroth
Corporation. Without their consent it may not be reproduced or given to
third parties.
The data specifi ed above only serve to describe the product. No
statements concerning a certain condition or suitability for a certain
application can be derived from our information. The information given
does not release the user from the obligation of own judgment and
verifi cation. It must be remembered that our products are subject to a
natural process of wear and aging.
