RE 25722, edition: 2012-08, Bosch Rexroth AG
Pressure relief valve,
direct operated
Features
▶ Sandwich plate valve
▶ Porting pattern according to ISO 4401-03-02-0-05
▶ 3 pressure ratings, optional
▶ 5 directions of action, optional
▶ With 1 or 2 pressure valve cartridges
▶ 2 adjustment types, optionally:
– Sleeve with internal hexagon
– Lockable rotary knob with scale
Contents
Features 1
Contents 1
Ordering code 2
Symbols 3
Function, section 3
Technical data 4
Characteristic curves 5, 6
Device dimensions 7 … 9
More information 10
▶ Size 6
▶ Component series 1X
▶ Maximum operating pressure 315 bar
▶ Maximum flow 60 l/min
RE 25722
Edition: 2012-08
Replaces: 01.09
tb0237
Type ZDBY D, Z2DBY D
Inhalt
Features 1
Contents 1
Ordering code 2
Symbols (① = component side, ② = plate side) 3
Function, section 3
Technical data
(For applications outside these parameters, please consult
us!) 4
Characteristic curves: Version "A", "B", "P" and "C"
(measured with HLP46, ϑ
Oil
= 40 ± 5 °C) 5
Characteristic curves: Version "D"
(measured with HLP46, ϑ
Oil
= 40 ± 5 °C) 6
Device dimensions: Version "A"
(dimensions in mm) 7
Device dimensions: Version "B" and "P"
(dimensions in mm) 8
Device dimensions: Version "C" and "D"
(dimensions in mm) 9
More information 10
Notes 11
Notes 12
2/10 ZDBY D, Z2DBY D | Pressure relief valve
Bosch Rexroth AG, RE 25722, edition: 2012-08
Ordering code
01 Sandwich plate valve Z
02 1 pressure valve cartridge (only with version "A" "B" and "P") no code
2 pressure valve cartridges (only with version "C" and "D") 2
03 Pressure relief valve DB
04 Porting pattern according to ISO 4401-03-02-0-05 Y
05 Size 6 6
06 Direct operated D
07 Relief function from - to:
P – T P
A – T A
B – T B
A – T and B – T C
A – B and B – A D
08 Adjustment type
Sleeve with internal hexagon 2
Lockable rotary knob with scale (only version "80")
1)
3
09 Component series 10 to 19 (10 to 19: unchanged installation and connection dimensions) 1X
10 Pressure rating
Set pressure up to 80 bar 80
Set pressure up to 160 bar 160
Set pressure up to 315 bar 315
11 Seal material
FKM seals V
(other seals upon request) Attention! Observe compatibility of seals with hydraulic fluid used!
12 Porting pattern according to ISO 4401-03-02-0-05 60
13 Further details in the plain text
1)
H-key with the Material no. R900008158 is included in the scope
of delivery.
01 02 03 04 05 06 07 08 09 10 11 12 13
Z DB Y 6 D – 1X / V / 60 *
Notice! Preferred types and standard units are
contained in the EPS (standard price list).
1
64 52 3
1
2
ABTP
ABTP
M
Pressure relief valve | ZDBY D, Z2DBY D 3/10
RE 25722, edition: 2012-08, Bosch Rexroth AG
Symbols (① = component side, ② = plate side)
Version "A" Version "B"
TPAB
1
2
TPAB
1
2
Version "P"
TPAB
1
2
M
Version "C" Version "D"
TPAB
1
2
TPAB
1
2
Type ZDBY 6 DP2 …
Pressure valves of type ZDBY and Z2DBY are direct oper-
ated pressure relief valves in sandwich plate design. They
are used for limiting a system pressure.
The valves basically consist of the housing (1) and one or
two pressure valve cartridges (2). The system pressure can
be set via the adjustment type (3).
In the initial position the valves are closed. The pressure in
channel A acts on the spool (4). If the pressure in channel A
exceeds the value set at the spring (5), the pilot poppet (6)
opens. Hydraulic fluid flows from channel P into channel T.
The pilot oil return from the spring chambers is imple-
mented internally via channel T.
Function, section
4/10 ZDBY D, Z2DBY D | Pressure relief valve
Bosch Rexroth AG, RE 25722, edition: 2012-08
Technical data
(For applications outside these parameters, please consult us!)
1)
The cleanliness classes specified for the components must be
adhered to 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 315
Maximum counter pressure (port T) bar 160
Maximum set pressure bar 80; 160; 315
Maximum flow l/min 60
Hydraulic fluid see table below
Hydraulic fluid temperature range °C –15 … +80
Viscosity range mm
2
/s 10 … 500
Maximum permitted degree of contamination of the hydraulic
fluid - cleanliness class according to ISO 4406 (c)
Class 20/18/15
1)
general
Weight – Version "2" kg 1.4
– Version "3" kg 1.8
Installation position any
Ambient temperature range °C –15 … +80
Hydraulic fluid Classification Suitable sealing materials Standards
Mineral oils and related hydrocarbons HL, HLP, HLPD FKM DIN 51524
Bio-degradable – insoluble in water HETG FKM VDMA 24568
HEES FKM
– soluble in water HEPG FKM VDMA 24568
Important information on hydraulic fluids!
▶ For more information and data on the use of other hydraulic fluids
refer to data sheet 90220 or contact us!
▶ There may be limitations regarding the technical valve data (tem-
perature, pressure range, service life, maintenance intervals, etc.)!
0
0
10 20 30 40 50 60
10
20
30
40
50
60
70
80
90
100
0
0
10 20 30 40 50 60
20
40
60
80
100
120
140
160
180
0
0
10 20 30 40 50 60
100
50
150
250
200
350
300
Pressure relief valve | ZDBY D, Z2DBY D 5/10
RE 25722, edition: 2012-08, Bosch Rexroth AG
Characteristic curves: Version "A", "B", "P" and "C"
(measured with HLP46, ϑ
Oil
= 40 ± 5 °C)
p-q
V
characteristic curves – version "80"
p-q
V
characteristic curves – version "160"
p-q
V
characteristic curves – version "315"
Flow in l/min →
Flow in l/min →
Flow in l/min →
Operating pressure in bar →Operating pressure in bar →Operating pressure in bar →
0
0
10 20 30 40 50 60
20
40
60
80
100
120
140
0
0
10 20 30 40 50 60
80
40
120
160
240
200
0
0
10 20 30 40 50 60
100
50
150
200
300
400
350
250
6/10 ZDBY D, Z2DBY D | Pressure relief valve
Bosch Rexroth AG, RE 25722, edition: 2012-08
Characteristic curves: Version "D"
(measured with HLP46, ϑ
Oil
= 40 ± 5 °C)
p-q
V
characteristic curves – version "80"
p-q
V
characteristic curves – version "160"
p-q
V
characteristic curves – version "315"
Flow in l/min →
Flow in l/min →
Flow in l/min →
Operating pressure in bar →Operating pressure in bar →Operating pressure in bar →
=
40
=
P
T
B
A
F1
F2
F3
F4
G
69
13
7,5
2
46
4 x Ø5,2H13
1
2
6
5
1
B
8
6
4
2
7
5
3
1
1098
max 1212620
3
4
max 76
2
7
Rz1max 4
0,01/100
Pressure relief valve | ZDBY D, Z2DBY D 7/10
RE 25722, edition: 2012-08, Bosch Rexroth AG
Device dimensions: Version "A"
(dimensions in mm)
① component side – Porting pattern according to
ISO 4401-03-02-0-05 (with locating hole Ø4 x 4 mm deep)
②
plate side – Porting pattern according to ISO 4401-03-02-0-05
(with locating hole Ø3 x 5 mm deep for locking pin
ISO 8752-3x8-St, material no. R900005694, separate order)
1 Name plate
2 Adjustment type "2"
3 Adjustment type "3"
4 Space required to remove the key
5 Valve mounting bores
6 Identical seal rings for ports A, B, P, T (plate side)
7 Lock nut SW17, tightening torque M
A
= 10
+5
Nm
Valve mounting screws (separate order)
4 hexagon socket head cap screws ISO 4762 - M5 - 10.9
Notice!
Length and tightening torque of the valve mounting screws must
be calculated according to the components mounted under and
over the sandwich plate valve.
Required surface quality of the valve
contact surface
B
8
6
4
2
7
5
3
1
1098
P
T
B
A
F1
F2
F3
F4
G
4 max 164 26 20
11
=
69
13
7,520,5
2
46
40
=
max 132
4 x Ø5,2H13
1
2
6
5
13
4
8
2
7
Rz1max 4
0,01/100
8/10 ZDBY D, Z2DBY D | Pressure relief valve
Bosch Rexroth AG, RE 25722, edition: 2012-08
Device dimensions: Version "B" and "P"
(dimensions in mm)
① component side – Porting pattern according to
ISO 4401-03-02-0-05 (with locating hole Ø4 x 4 mm deep)
②
plate side – Porting pattern according to ISO 4401-03-02-0-05
(with locating hole Ø3 x 5 mm deep for locking pin
ISO 8752-3x8-St, material no. R900005694, separate order)
1 Name plate
2 Adjustment type "2"
3 Adjustment type "3"
4 Space required to remove the key
5 Valve mounting bores
6 Identical seal rings for ports A, B, P, T (plate side)
7 Lock nut SW17, tightening torque M
A
= 10
+5
Nm
8 Measuring port (only version "P")
Valve mounting screws (separate order)
4 hexagon socket head cap screws ISO 4762 - M5 - 10.9
Notice!
Length and tightening torque of the valve mounting screws must
be calculated according to the components mounted under and
over the sandwich plate valve.
Required surface quality of the valve
contact surface
B
8
6
4
2
7
5
3
1
1098
P
T
B
A
F1
F2
F3
F4
G
69
13
20
4 x Ø5,2H13
6
5
13
2
7
B
8
6
4
2
7
5
3
1
1098
max 164 26
20
4
max 121
2620
4
7,5
2
7
3
2
46
40
max 132
max 89
20
Rz1max 4
0,01/100
Pressure relief valve | ZDBY D, Z2DBY D 9/10
RE 25722, edition: 2012-08, Bosch Rexroth AG
Device dimensions: Version "C" and "D"
(dimensions in mm)
① component side – Porting pattern according to
ISO 4401-03-02-0-05 (with locating hole Ø4 x 4 mm deep)
②
plate side – Porting pattern according to ISO 4401-03-02-0-05
(with locating hole Ø3 x 5 mm deep for locking pin
ISO 8752-3x8-St, material no. R900005694, separate order)
1 Name plate
2 Adjustment type "2"
3 Adjustment type "3"
4 Space required to remove the key
5 Valve mounting bores
6 Identical seal rings for ports A, B, P, T (plate side)
7 Lock nut SW17, tightening torque M
A
= 10
+5
Nm
Valve mounting screws (separate order)
4 hexagon socket head cap screws ISO 4762 - M5 - 10.9
Notice!
Length and tightening torque of the valve mounting screws must
be calculated according to the components mounted under and
over the sandwich plate valve.
Required surface quality of the valve
contact surface
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone+49 (0) 93 52 / 18-0
documentation@boschrexroth.de
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 repro-
duced or given to third parties without its consent.
The data specified 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 verification. It must be remembered
that our products are subject to a natural process of wear and aging.
Bosch Rexroth AG, RE 25722, edition: 2012-08
10/10 ZDBY D, Z2DBY D | Pressure relief valve
More information
▶ Subplates Data sheet 45053
▶ Hydraulic fluids on mineral oil basis Data sheet 90220
▶ Reliability characteristics according to EN ISO 13849 Data sheet 08012
▶ General product information on hydraulic products Data sheet 07008
▶ Assembly, commissioning and maintenance of industrial valves Data sheet 07003
▶ Selection of the filters www.boschrexroth.com/filter
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone+49 (0) 93 52 / 18-0
documentation@boschrexroth.de
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 repro-
duced or given to third parties without its consent.
The data specified 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 verification. It must be remembered
that our products are subject to a natural process of wear and aging.
Pressure relief valve | ZDBY D, Z2DBY D 11/10
RE 25722, edition: 2012-08, Bosch Rexroth AG
Notes
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone+49 (0) 93 52 / 18-0
documentation@boschrexroth.de
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 repro-
duced or given to third parties without its consent.
The data specified 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 verification. It must be remembered
that our products are subject to a natural process of wear and aging.
Bosch Rexroth AG, RE 25722, edition: 2012-08
12/10 ZDBY D, Z2DBY D | Pressure relief valve
Notes
