DBAW25BH2-2X/315Z6EG24N9K4A08
Manufacturer: Bosch Rexroth
Material #: R900743438
Model : DBAW25BH2-2X/315Z6EG24N9K4A08
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth DBAW25BH2-2X/315Z6EG24N9K4A08 (R900743438) is a sophisticated pump safety block designed for direct mounting onto SAE pressure ports of pumps. This pilot-operated pressure relief valve is integrated into a block and serves the critical function of limiting the operating pressure and enabling solenoid-actuated unloading. The DBAW25BH2-2X/315Z6EG24N9K4A08, in particular, allows for unloading the main control spool by controlling the mounted directional valve without requiring a cover plate.
This model maintains the core functionality of the DBAW series, with additional features tailored to specific pump types. For displacement pumps, it uses a pressure relief valve type ZDB and directional valve actuation to deactivate pilot control and activate pressure set at the ZDB valve. Similarly, for control pump AV applications, it manipulates pressure at control port X through the ZDB valve affecting the pump's controller. In dual-pressure adjustment scenarios for control pump AV applications, two separate adjustments can be made at port X with settings below those of the screw-in cartridge valve type DB K.
The unit comes with options including various adjustment types such as a rotary knob or lockable rotary knob with scale, and optional pressure ratings to accommodate different operational requirements. Its design ensures zero-pressure startup and circulation of the pump while maintaining low circulation pressure due to its proximity to the pump. The compact compression volume allows for soft switching to depressurized circulation and quick pressure buildup. Moreover, its direct flange mounting contributes to a reduced noise level during operation.
In summary, this Bosch Rexroth safety block is an essential component for hydraulic systems requiring precise pressure relief and unloading capabilities suitable for various types of pumps while ensuring efficient operation and noise reduction.
$5,026.00 USD
More are expected on April 11, 2025
Status: This product is temporarily out of stock.
Qty: Delivered as early as April 11, 2025 when ordered in
This product is eligible for factory repair.
General
Pump safety blocks type DBAW are pilot-operated pressure relief valves which are integrated into a block and intended to be mounted directly onto SAE pressure ports of pumps.
They are used for limiting and solenoid-actuated unloading (type DBAW) the operating pressure.
Pump safety block type DBAW
In principle, the function of this block corresponds to the function of block type DBA.... Unloading the main control spool, however, is achieved by controlling the mounted directional valve (15). In this case, no cover plate (4) is required.
Pump safety block type DBAW.B…Z… for displacement pumps (with pressure relief valve)
In principle, the function corresponds to type DBAW....
By means of the pressure relief valve type ZDB 6 (16) (data sheet 25751) and actuation of the directional valve (15), the pilot control of the pressure limitation screw-in cartridge valve type DB 20 K is deactivated and the pressure set at the pressure relief valve type ZDB 6 is activated. The pressure adjustment at the pressure relief valve type ZDB 6 only works if it is below the setting of the pressure limitation screw-in 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 type DBAW....
By means of the pressure relief valve type ZDB 6 (16) (data sheet 25751) and by actuation of the directional valve (15), a pressure change is achieved at control port X. The pressure change set at the pressure relief valve type ZDB 6 acts on the controller of the pump. The pressure adjustment at the pressure relief valve type ZDB 6 only works if it is below the setting of the pressure limitation screw-in cartridge 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 type DBAW....
By means of the pressure relief valve type Z(2)DB 6 (16) (data sheet 25751) and by actuation of the directional valve (15), two pressure adjustments are possible at control port X. The pressure adjustment at the pressure relief valve type Z(2)DB 6 only works if it is below the setting of the pressure limitation screw-in cartridge valve type DB 20 K.
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01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
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DBAW |
2X |
/ |
6E |
K4 |
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Type |
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01 |
With mounted directional spool valve (data sheet 23178) |
DBAW |
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Size |
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02 |
Size 16 |
15 |
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Size 25 |
25 |
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Size 32 |
30 |
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03 |
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With mounted directional spool valve 4WE 6 L37B.6X/..; normally closed |
A |
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With mounted directional spool valve 4WE 6 H 6X/..; normally open 1) |
B |
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With mounted directional spool valve 4WE 6 HB 6X/..; normally open 2) |
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Type of connection / SAE flange 3) |
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04 |
Standard flange (250 … 350 bar) |
F |
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High-pressure flange (350 bar) |
H |
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Adjustment type for pressure adjustment 4) |
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05 |
Rotary knob |
1 |
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Sleeve with hexagon and protective cap |
2 |
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Lockable rotary knob with scale |
3 12) |
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Rotary knob with scale |
7 |
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06 |
Without pressure switch |
– |
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With mounted pressure switch type HED 8 OH… (connector according to DIN EN 175301-803, without mating connector), (data sheet 50061) |
D 5) |
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Component series |
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07 |
Component series 20 ... 29 (20 ... 29: unchanged installation and connection dimensions) |
2X |
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Pressure rating 6) |
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08 |
Set pressure up to 50 bar |
50 |
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Set pressure up to 100 bar |
100 |
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Set pressure up to 200 bar |
200 |
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Set pressure up to 315 bar |
315 |
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Set pressure up to 350 bar |
350 |
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09 |
Without additional pressure relief valve (standard, only one pressure limitation) |
no code |
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With mounted pressure relief valve type ZDB 6 VB…-4X/..SO2 (data sheet 25751) |
Z6) |
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With mounted pressure relief valve type Z2DB 6 VC…-4X/..SO2 (data sheet 25751) |
ZZ 6) 7) |
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10 |
Standard version |
no code |
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Valve for minimum cracking pressure |
U |
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11 |
Without directional valve |
no code |
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With directional spool valve |
6E |
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12 |
Direct voltage 24 V |
G24 |
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Direct voltage 205 V |
G205 |
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Alternating voltage 230 V, 50/60 Hz |
W230 |
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13 |
With concealed manual override (standard) |
N98) |
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With manual override |
N8) |
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Without manual override |
no code |
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Electrical connection 10) |
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14 |
Without mating connector; connector DIN EN 175301-803 |
K4 5) |
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Interface electronics |
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15 |
Without electronics |
no code |
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Nozzle fitting |
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16 |
Fixed pumps |
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Lateral channel closed, transverse channel open, pilot oil bore open; (standard for displacement pumps; pure DB-/DBW function) |
no code |
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Variable pumps |
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Lateral channel closed, transverse channel open, pilot oil bore closed (e.g. for axial piston variable displacement pump type A4VSO140 with DRG controller) |
A00 |
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Nozzle Ø0.8 mm in lateral channel, transverse channel open; pilot oil bore closed (standard for control pumps with DFR1 or DFLR controller) |
A08 9) |
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Nozzle Ø1.0 mm in lateral channel, transverse channel open; pilot oil bore closed (for nozzle fitting of the block, refer to the circuit examples) |
A10 9) |
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Seal material 11) |
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17 |
NBR seals |
no code |
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FKM seals |
V |
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Type-examination procedure |
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18 |
Without type-examination procedure |
no code |
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Type-examination tested safety valve according to PED 2014/68/EU |
E |
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19 |
Standard solenoid coil |
no code |
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Solenoid coil is an approved component with UR-marking according to UL 906 (only version "6E") |
= UR |
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| 1) In versions with pressure relief valve type Z(2)DB | |
| 2) In versions without pressure relief valve type Z(2)DB | |
| 3) Observe pressure ratings and connection dimensions! | |
| 4) Adjustment type for pressure switch type HED8 in brackets! | |
| 5) Mating connectors, separate order | |
| 6) Identical pressure rating for pressure limitation screw-in cartridge valve type DB 20 K, pressure relief valve (sandwich plate valve) type Z(2)DB 6 and pressure switch type HED 8 | |
| 7) Only in case of use for pressure limitation and control of the variable displacement pump type A10VSO | |
| 8) Notice! Accidental activation of the manual override may lead to uncontrolled machine movements! | |
| 9) If used on variable displacement pumps with DFLR controllers, the nozzle at port X of the pump control must be removed! | |
| 10) Externally discharge the pilot oil from the proportional pressure relief valve type DBET(E) | |
| 11) Observe compatibility of seals with hydraulic fluid used. (Other seals upon request) | |
| 12) H-key with material no. R900008158 is included in the scope of delivery. |
Notice! Preferred types and standard units are contained in the EPS (standard price list).
(measured with HLP46, ϑOil = 40 ±5 °C)
Inlet pressure dependent on the flow 2)
| 1) | The characteristic curves apply to an output pressure pT =0 bar in the entire flow range. |
Notice!
The characteristic curves were measured with internal pilot oil return.
Due to the internal pilot oil return, the inlet pressure increases by the output pressure present in port T.
Minimum set pressure and circulation pressure dependent on the flow 1)
Standard version
| 1) | The characteristic curves apply to an output pressure pT =0 bar in the entire flow range. |
Minimum set pressure and circulation pressure dependent on the flow 1)
Version “U”
| 1) | The characteristic curves apply to an output pressure pT =0 bar in the entire flow range. |
Safety instructions:Type-examination tested safety valves type DBA…E, component series 2X according to Pressure Equipment Directive 2014/68/EU
Maximum admissible flow q Vmax dependent on the counter pressure pT in the discharge line with internal pilot oil return
Type DBA 15 …-2X/…E
Characteristic curves for intermediate values can be generated by interpolation. Further explanations see below.
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pA |
Response pressure in bar |
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pT |
Maximum admissible counter pressure in the discharge line in bar (port T) (sum of all possible counter pressures; also see AD2000 data sheet A2) |
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pT max |
10 % x pA (with qV = 0) according to PED 2014/68/EU |
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qV max |
Maximum admissible flow in l/min |
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Explanation of the diagrams (Example: type DBA 15...E): |
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known: |
Flow of the system/accumulator that has to be secured qVmax = 100 l/min |
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Set response pressure of the safety valve pA = 315 bar |
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unknown: |
pTadmissible |
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Solution: |
see arrows in diagram above |
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pT admissible (100 l/min; 315 bar) = 15.75 bar |
|
Type DBA 25 …-2X/…E and type DBA 30 …-2X/…E
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pA |
Response pressure in bar |
|
pT |
Maximum admissible counter pressure in the discharge line in bar (port T) (sum of all possible counter pressures; also see AD2000 data sheet A2) |
|
pT max |
10 % x pA (with qV = 0) according to PED 2014/68/EU |
|
qV max |
Maximum admissible flow in l/min |
General circuit example set-up
Arrangement of the nozzles/plugs items 17.1, 17.2 and 17.3
Circuit examples: for displacement pumps (selection)
Type DBAW.B…2X/.Z
Type DBAW.A…2X/…
Type DBAW.B…2X/…
Circuit examples: for variable displacement pump (selection)
Preferably for axial piston variable displacement pumps type A10VSO with DR, DFR1 or DFLR controller 2)
Type DBAW.B…2X/…A08
Type DBAW.B…2X/.Z…A08
Type DBAW.B…2X/.ZZ…A08
| 2)Notice! | |
| If used on variable displacement pumps with DFLR controllers, the nozzle at port X of the pump control must be removed! |
Preferably for axial piston variable displacement pumps type A10VSO with DRG controller
Type DBAW.B…2X/.Z…A00
Type DBAW.B…2X/.ZZ…A00
Dimensions in mm
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|
Required surface quality of the valve contact surface |
|
1 |
Name plate |
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3 |
Port X for variable displacement pump type A10VSO (otherwise closed); G1/4 |
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4 |
Port M for pressure gauge; G1/4 |
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5 |
Mating connector without circuitry (separate order) |
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6 |
Mating connector with circuitry (separate order) |
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8 |
Adjustment type "1" 1) |
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14 |
Space required to remove the mating connector |
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15 |
Seal ring |
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16 |
Directional spool valve type WE 6 (data sheet 23178) |
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17 |
Dimensions for solenoid with concealed manual override "N9” (standard) – The manual override can only be operated up to approx. 50 bar tank pressure. Avoid damage to the bore of the manual override! (Special tool for the operation, separate order, material no. R900024943). |
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18 |
Dimension for valve with manual override "N" |
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19 |
Dimension for valve without manual override |
|
24 |
Hexagon SW30, tightening torque MA = 50 Nm (For tightening, a manual torque wrench with a tolerance ≤ 10 % must be used.) |
|
25 |
Lock nut SW22, tightening torque MA = 10±5 Nm |
|
26 |
Porting pattern according to DIN 24340 form A (without locating hole), or ISO 4401-03-02-0-05 (with locating hole for locking pin ISO 8752-3x8-St, material no. R900005694, separate order) |
|
28 |
Valve mounting bores |
Dimensions in mm
| 1) | Version "ZZ" |
| 2) | Version "Z" |
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Required surface quality of the valve contact surface |
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1 |
Name plate |
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3 |
Port X for variable displacement pump type A10VSO (otherwise closed); G1/4 |
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4 |
Port M for pressure gauge; G1/4 |
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5 |
Mating connector without circuitry (separate order) |
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6 |
Mating connector with circuitry (separate order) |
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8 |
Adjustment type "1" 1) |
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9 |
Adjustment type "2" 1) |
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10 |
Adjustment type "3" 1) |
|
11 |
Adjustment type "7" 1) |
|
12 |
Hexagon SW10 |
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13 |
Space required to remove the key |
|
14 |
Space required to remove the mating connector |
|
15 |
Seal ring |
|
16 |
Directional spool valve type WE 6 (data sheet 23178) |
|
20 |
Pressure relief valve (sandwich plate) type Z(2)DB 6 …(data sheet 25751) |
|
24 |
Hexagon SW30, tightening torque MA = 50 Nm (For tightening, a manual torque wrench with a tolerance ≤ 10 % must be used.) |
|
25 |
Lock nut SW22, tightening torque MA = 10±5 Nm |
|
26 |
Porting pattern according to DIN 24340 form A (without locating hole), or ISO 4401-03-02-0-05 (with locating hole for locking pin ISO 8752-3x8-St, material no. R900005694, separate order) |
|
28 |
Valve mounting bores |
|
Standard flanges type DBA…F… according to DIN ISO 6162-1 |
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Size |
Line connections |
4 valve mounting screws ISO 4762 - 10.9 1) |
Tightening torqueMA in Nm 2) |
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P and P1 |
T |
X, M |
Part number |
|||
|
16 |
SAE 3/4″ |
G3/4 |
G1/4 |
M10 x 95 |
R913015585 |
52 |
|
25 |
SAE 1″ |
G1 |
G1/4 |
M10 x 95 |
R913015585 |
52 |
|
32 |
SAE 1 1/4″ |
G1 1/4 |
G1/4 |
M10 x 95 |
R913015585 |
52 |
|
Admissible pressures (flange connections according to DIN ISO 6121-1) |
|
|
in bar |
|
|
SAE 3/4″ |
350 |
|
SAE 1″ |
315 |
|
SAE 1 1/4″ |
250 |
|
High-pressure flanges type DBA…H… according to DIN ISO 6162-2 |
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|
Size |
Line connections |
4 valve mounting screws ISO 4762 - 10.9 1) |
Tightening torqueMA in Nm 2) |
|||
|
P and P1 |
T |
X |
Part number |
|||
|
16 |
SAE 3/4″ |
G3/4 |
G1/4 |
M10 x 95 |
R913015585 |
52 |
|
25 |
SAE 1″ |
G1 |
G1/4 |
M12 x 105 |
R913000659 |
66 |
|
32 |
SAE 1 1/4″ |
G1 1/4 |
G1/4 |
M14 x 105 |
R913000660 |
113 |
|
Admissible pressures (flange connections according to DIN ISO 6121-2) |
|
|
in bar |
|
|
SAE 3/4″ |
350 |
|
SAE 1″ |
350 |
|
SAE 1 1/4″ |
350 |
| 1) Valve mounting screws (separate order) | |
| 4 hexagon socket head cap screws ISO 4762 - 10.9-flZn-240h-L | |
| (with friction coefficient μtotal = 0.09 ... 0.14) |
2) Notice!
The tightening torques stated are guidelines when using screws with the specified friction coefficients and when using a manual torque wrench (tolerance ± 10 %).
Standard flanges type DBAW…F…
|
NG |
B2 |
B7 |
B8 |
H6 |
H7 |
|
mm |
mm |
mm |
mm |
mm |
|
| 16 | 12 | 144.5 | 109.5 | 159 | 153 |
| 25 | 12 | 144.5 | 109.5 | 159 | 153 |
| 32 | 10 | 144.5 | 111.5 | 159 | 153 |
High-pressure flanges type DBAW…H…
|
NG |
B2 |
B7 |
B8 |
H6 |
H7 |
|
mm |
mm |
mm |
mm |
mm |
|
| 16 | 12 | 144.5 | 109.5 | 159 | 153 |
| 25 | 12 | 144.5 | 109.5 | 159 | 153 |
| 32 | 14.5 | 145 | 107 | 163 | 157 |
Standard flanges type DBAW..F…Z…
|
NG |
B2 |
H8 |
H9 |
|
mm |
mm |
mm |
|
| 16 | 12 | 199 | 193 |
| 25 | 12 | 199 | 193 |
| 32 | 10 | 199 | 193 |
High-pressure flanges type DBAW..H…Z…
|
NG |
B2 |
H8 |
H9 |
|
mm |
mm |
mm |
|
| 16 | 12 | 199 | 193 |
| 25 | 12 | 199 | 193 |
| 32 | 14.5 | 203 | 197 |
Notice!
For reasons of stability, other valve mounting screws must not be used!
Depending on the operating pressure, flange height and thread depth of the pump plate, other screw lengths may be necessary!
Mating connectors for valves with connector “K4”, without circuitry, standard
3P Z4
Mating connectors for valves with connector “K4”, without circuitry, standard
3P Z4
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair
Mating connectors for valves with connector “K4”, with indicator light
3P Z5L
Mating connectors for valves with connector “K4”, with indicator light
3P Z5L
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair
Mating connectors for valves with connector “K4”, with indicator light and Zener diode suppression circuit
3P Z5L1
Mating connectors for valves with connector “K4”, with indicator light and Zener diode suppression circuit
3P Z5L1
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair
Mating connectors for valves with connector “K4”, with rectifier
3P RZ5
Mating connectors for valves with connector “K4”, with rectifier
3P RZ5
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair
Mating connectors for mechanical pressure switches with connector “K14”, without circuitry, standard
4P Z14
Mating connectors for mechanical pressure switches with connector “K14”, without circuitry, standard
4P Z14
For mechanical pressure switches with connector “K14”, according to EN 175301-803 and ISO 4400, 3-pole + PE, “large cubic connector”Data sheet
Spare parts & repair
Mating connectors for mechanical pressure switches with connector “K14”, with indicator lights at connections 2 and 3
4P Z15L
Mating connectors for mechanical pressure switches with connector “K14”, with indicator lights at connections 2 and 3
4P Z15L
For mechanical pressure switches with connector “K14”, according to EN 175301-803 and ISO 4400, 3-pole + PE, “large cubic connector”Data sheet
Spare parts & repair
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