DBAW40BH2N1X/250S6EG24N9K4R12

Manufacturer: Bosch Rexroth

Material #: R901437842

Model : DBAW40BH2N1X/250S6EG24N9K4R12

***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 DBAW40BH2N1X/250S6EG24N9K4R12 (R901437842) is a sophisticated pump safety block designed to be directly mounted onto the SAE pressure port of pumps. It serves as a pilot-operated pressure relief valve, integrated into a block, and is crucial for limiting the operating pressure. The unit comprises a valve block, a main spool insert, and a pilot control valve that features various adjustment types for precise pressure modification. The valve housing includes an input port P for hydraulic fluid and an output port P, with the main spool insert situated between these ports to facilitate connection to port T for tank line when open. This model offers enhanced functionality by allowing for zero-pressure startup and circulation of the pump through its built-in directional valve. This ensures that pumps can be started without pressurization, which is particularly beneficial in systems requiring gentle start-up procedures. Additionally, it boasts switching shock damping capabilities which are achieved by installing it between the pilot control valve and the directional valve. This feature helps mitigate pressure peaks and reduce acoustic decompression shocks in return lines by delaying the opening of connections from B to B or P to P. The DBAW40BH2N1X/250S6EG24N9K4R12 comes equipped with various options for adjustment types including rotary knobs, sleeves with hexagon and protective cap, lockable rotary knobs with scale, or rotary knobs with scale. It also offers optional features such as solenoid-actuated unloading via the built-on directional valve and an integrated check valve. The shock damping function can be customized with different nozzle sizes to control decompression shock levels. This pump safety block operates at a maximum pressure of 250 bar and supports maximum flow rates as specified in its product documentation. Its design ensures quick pressure buildup while providing options for customization based on specific application needs.

$4,087.00 USD

More are expected on May 21, 2025

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Status: This product is temporarily out of stock.

Qty: Delivered as early as May 21, 2025 when ordered in

This product is eligible for factory repair.

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Zero-pressure start-up and circulation of the pump For direct mounting to the SAE pressure port of the pump Quick pressure build-up 4 adjustment types for pressure adjustment, optionally
• Rotary knob
• Sleeve with hexagon and protective cap
• Lockable rotary knob with scale
• Rotary knob with scale 5 pressure ratings, optional Solenoid-actuated unloading via a built-on directional valve Integrated check valve, optional Switching shock damping, optional

Pump safety blocks of type DBAW are pilot-operated pressure relief valves which are integrated into a block and intended to be mounted directly onto the SAE pressure port of pumps.

They are used for limiting the operating pressure. The pump safety blocks (DBAW) basically consist of a valve block (1), main spool insert (3) and pilot control valve (2) with adjustment type for pressure adjustment. The valve housing has a port P for the hydraulic fluid input and port P1 for the output. In a branch of the through-bore between these two ports there is the main spool insert. When this is open there is a connection to port T (tank line).

Pump safety block type DBAW...

In addition, it can be switched from the pressure limiting function to depressurized circulation by controlling the built-on directional valve (16). Thus, a depressurized start-up of the pump is possible.

Representation: directional valve open

Pump safety block with switching shock damping (sandwich plate), type DBAW…S6E...R12 and type DBAW…S6SM...B12

The opening of the connection from B2 to B1 or P2 to P1 is delayed by means of the switching shock damping valve (17). Pressure peaks and acoustic decompression shocks in the return line can thus be avoided. It is installed between the pilot control valve (2) and the directional valve (16).

The degree of damping (decompression shock) is determined by the size of the nozzle (18). By default, a nozzle Ø1.2 mm is installed (ordering code ..R12.. or ..B12..).

Type DBAW…S6E...R12

Type DBAW…S6SM...B12

01	02	03	04	05	06	07	08	09		10	11	12	13	14	15	16	17	18	19	20	21
DBA	W							1X	/												*

01	Pump safety block	DBA
02	With attached directional valve	W
03	Without check valve	no code
03	With check valve	R 1)
04	Size 32	30
04	Size 40	40
05	Normally closed	A 2)
05	Normally open	B 2)
Connection / SAE flange 3)
Connection / SAE flange 3)
06	Standard flange (200 … 350 bar)	F
06	High-pressure flange (350 bar)	H
Adjustment type for pressure adjustment
07	Rotary knob	1
	Sleeve with hexagon and protective cap	2
	Lockable rotary knob with scale	3 4)
	Rotary knob with scale	7
08	With main spool Ø24 mm	–
08	With main spool Ø28 mm	N
09	Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions)	1X
Pressure rating
10	Set pressure … 50 bar	50
	Set pressure … 100 bar	100
	Set pressure … 200 bar	200
	Set pressure … 250 bar	250
	Set pressure … 315 bar	315
	Set pressure … 350 bar (only version “H”)	350
Pilot flow
11	Pilot oil supply and pilot oil return internal (standard)	– 5)
11	Internal pilot oil supply, external pilot oil return	Y
12	Standard version	no code
12	Valve for minimum cracking pressure (not suitable for mutual relief!)	U
13	Without switching shock damping	no code
13	With switching shock damping	S
14	With directional spool valve (data sheet 23178)	6E 2)
14	With directional seat valve (data sheet 22058)	6SM 2)
15	Direct voltage 24 V	G24 2)
	Direct voltage 205 V	G205 2)
	Alternating voltage 230 V 50/60 Hz (version "6E" only)	W230 2)
16	Without manual override	no code
	With manual override (version "6E“ only)	N 2)
	With concealed manual override (standard)	N9 2)
Electrical connection
17	Without mating connector, with connector DIN EN 175301-803	K4 2;6)
18	Nozzle Ø1.2 mm in channel B of the directional spool valve	R12 7)
18	Nozzle Ø1.2 mm in channel P of the directional seat valve	B12 7)
Seal material
19	NBR seals	no code
	FKM seals	V
	(other seals upon request) Attention! Observe compatibility of seals with hydraulic fluid used!
Type-examination procedure
20	Without type-examination procedure	no code
20	Type-examination tested safety valve according to PED 2014/68/EU	E
21	Further details in the plain text	*

	1) Only … 315 bar
	2) Ordering code only required if 02 = “W”
	3) Please observe pressure ratings and connection dimensions! (see dimensions)
	4) H-key with the material no. R900008158 is included in the scope of delivery.
	5) Hyphen “–” only required if 02 = “W” and 12 and 13 = “no code”
	6) Mating connectors, separate order.
	7) Ordering code only required if 02 = “W” and 13 = “S”

Preferred types and standard units are contained in the EPS (standard price list).

Hydraulic fluid		Classification	Suitable sealing materials	Standards
Mineral oils and related hydrocarbons		HL, HLP, HLPD	NBR, FKM	DIN 51524
Bio-degradable	Insoluble in water	HETG	NBR, FKM	VDMA 24568
	Insoluble in water	HEES	FKM	VDMA 24568
	Soluble in water	HEPG	FKM	VDMA 24568
Containing water	Water-free	HFDU, HFDR	FKM	ISO 12922
Containing water	Containing water	HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620)	NBR	ISO 12922
Important information on hydraulic fluids! For further information and data on the use of other hydraulic fluids, please refer to data sheet 90220 or contact us! There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.)! Flame-resistant – containing water: Maximum operating pressure 210 bar Maximum hydraulic fluid temperature 60 °C Expected life cycle as compared to HLP hydraulic oil 30 % to 100 %

Technical data for directional seat valves see data sheet 22058, directional spool valves data sheet 23178.

Also see Deviating technical data for type-examination tested safety valves.

hydraulic

Size				32	40
Maximum operating pressure	Port P		bar	350
	Port T		bar	315
Cracking pressure	(with DBAR...)			0.5 bar
Maximum counter pressure	Port Y	DC solenoid	bar	210
		AC solenoid	bar	160
	Port T	DC solenoid	bar	210
		AC solenoid	bar	160
Maximum set pressure			bar	50 100 200 315 350
Minimum set pressure				flow-dependent, see characteristic curves
Maximum flow	DBAW, DBAWR		l/min	600 350	650 450
Hydraulic fluid				see table
Hydraulic fluid temperature range	NBR seals		°C	-30 … +80
	FKM seals		°C	-15 … +80
Viscosity range			mm²/s	10 … 800
Maximum admissible degree of contamination of the hydraulic fluid 1)				Class 20/18/15 according to ISO 4406 (c)

1)	The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter.

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

hydraulic

Maximum counter pressure	Port Y	bar	0
Maximum counter pressure	Port T	bar	10
Maximum flow			See ordering code, safety instructions and characteristic curves "Type-examination tested safety valve"
Hydraulic fluid			Mineral oil (HL, HLP) to DIN 51524
Hydraulic fluid temperature range	NBR seals	°C	-20 … +60
Hydraulic fluid temperature range	FKM seals	°C	-15 … +60
Viscosity range		mm²/s	12 … 230

general

Size			32	40
Weight		kg	9.2	12.6
	Check valve "R"	kg	0.3	0.4
	Switching shock damping "S"	kg	0.6
Installation position			any
Ambient temperature range	NBR seals	°C	-30 … +50
	FKM seals	°C	-15 … +50
Minimum stability of the housing materials			Housing materials are to be selected so that there is sufficient safety for all imaginable operating conditions (e.g. with regard to pressure resistance, thread stripping strengths and tightening torques).

For applications outside these parameters, please consult us!

(measured with HLP46, ϑOil = 40 ±5 °C)

Standard version

Minimum set pressure and circulation pressure dependent on the flow

Notice!

The characteristic curves were measured with external, depressurized pilot oil return. Due to the internal pilot oil return, the inlet pressure increases by the output pressure present in port T. The characteristic curves apply to the pressure at the valve output pT = 0 bar across the entire flow range.

Version “U”

Minimum set pressure and circulation pressure dependent on the flow

Inlet pressure dependent on the flow

Maximum admissible flow qV max dependent on the counter pressure pT in the discharge line with internal pilot oil return

Type DBA 30 …-1X/…E

Characteristic curves for intermediate values can be generated by interpolation.

Further explanations see explanation of the diagrams.

Type DBA 40 …-1X/…E

pA	Response pressure in bar
pT	maximum admissible counter pressure in bar) (sum of all possible counter pressures; also see AD2000 - data sheet A2)
	maximum admissible flow in l/min
	10 % x pA (with qV = 0) according to PED 97/23/EC

Explanation of the diagram
(Example: type DBA…E, above):
known:	Flow of the system/accumulator that has to be secured qVmax = 320 l/min
	Set response pressure of the safety valve pA = 350 bar
unknown:	pTadmissible
Solution:	see arrows in diagram above
	pT admissible (320 l/min; 350 bar) = 16.2 bar

Type DBAW…–…

Type DBAW…Y…

Type DBAWR…–…

Type DBAWR…Y…

With directional spool valve

Dimensions in mm

1	Name plate
2	Omitted with internal pilot oil return
3	Y port for pilot oil return, external
4	Adjustment type "1"
5	Adjustment type "2"
6	Adjustment type "3"
7	Adjustment type "7"
8	Hexagon SW10
9	Switching shock damping sandwich plate, optional
10	Space required to remove the key
11	Space required to remove the mating connector
12	Valve mounting bores
13.1	Directional spool valve NG6 (data sheet 23178)
14	Solenoid “a”
15	Optional auxiliary operating device
16	Mating connector without circuitry (separate order)
17	Mating connector with circuitry (separate order)
18	Seal ring
19	Integrated check valve, version "R"
20	Dimension for valve without manual override
21	Dimension for valve with concealed manual override "N9"
22	Dimension for valve with manual override "N"
23	Space required to remove the coil
24	Lock nut SW17, tightening torque MA = 10+5 Nm

With directional seat valve

Dimensions in mm

1	Name plate
2	Omitted with internal pilot oil return
3	Y port for pilot oil return, external
4	Adjustment type "1"
5	Adjustment type "2"
6	Adjustment type "3"
7	Adjustment type "7"
8	Hexagon SW10
9	Switching shock damping sandwich plate, optional
10	Space required to remove the key
11	Space required to remove the mating connector
12	Valve mounting bores
13.2	Directional seat valve NG6 (data sheet 22058)
14	Solenoid “a”
15	Optional auxiliary operating device
16	Mating connector without circuitry (separate order)
17	Mating connector with circuitry (separate order)
18	Seal ring
19	Integrated check valve, version "R"
23	Space required to remove the coil
24	Lock nut SW17, tightening torque MA = 10+5 Nm

NG	Version	Ports		4 valve mounting screws ISO 4762 - 10.9 1)		Tightening torqueMA in Nm 2)
		P and P1	T		Part number
32	„DBA“	SAE 1 1/4“	G1 1/4	M10 x 120	R913000074	52
	„DBAR“			M10 x 125	R913000668
40	„DBA“	SAE 1 1/2“	G1 1/2	M12 x 135	R913024229	77
	„DBAR“			M12 x 140	R913000312

Admissible pressures (flange connections according to DIN ISO 6162-2)

	Pressure
	bar
SAE 1 1/4″	250
SAE 1 1/2″	200

NG	Version	Ports		4 valve mounting screws ISO 4762 - 10.9 1)		Tightening torqueMA in Nm 2)
		P and P1	T		Part number
32	„DBA“	SAE 1 1/4“	G1 1/4	M14 x 135	R913024230	113
	„DBAR“			M14 x 145	R913024233
40	„DBA“	SAE 1 1/2“	G1 1/2	M16 x 155	R913024234	184
	„DBAR“			M16 x 160	R913000354

Admissible pressures (flange connections according to DIN ISO 6162-2)

	Pressure
	bar
SAE 1 1/4″	350
SAE 1 1/2″	350

Standardflansche, Ausführung „DBA(R)…F“

Version	L1	L2	L3	L4	B1	B2	B3	B4	B5	B6	H1	H2	H3	H4	H5	H6	ØD1	ØD3
Version	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
DBA32...F	121	138	55	38.5	30.2	58.7	65	48.3	-	-	105	125	43	85	43	-	11	45
DBA40...F	138	156	54.5	49.5	35.8	69.9	74.5	54.7	-	-	118	138	50	98	56	-	13	54
DBAR32...F	121	138	55	38.5	30.2	58.7	65	48.3	60	80	105	125	43	85	43	9	11	40
DBAR40...F	138	156	54.5	49.5	35.8	69.9	74.5	54.7	60	100	118	138	50	98	56	8	13	54

High-pressure flanges, version “DBA(R)…H“

Version	L1	L2	L3	L4	B1	B2	B3	B4	B5	B6	H1	H2	H3	H4	H5	H6	ØD1	ØD3
Version	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
DBA32...H	121	138	55	38.5	31.8	66.7	65	48.3	-	-	105	125	43	85	43	-	15	45
DBA40...H	138	156	54.5	49.5	36.6	79.4	74.5	54.7	-	-	118	138	50	98	56	-	17	54
DBAR32...H	121	138	55	38.5	31.8	66.7	65	48.3	60	90	105	125	43	85	43	8	15	40
DBAR40...H	138	156	54.5	49.5	36.6	79.4	74.5	54.7	65	110	118	138	50	98	56	8	17	54

Safety instructions: Type-examination tested safety valves type DBA…E, component series 1X according to Pressure Equipment Directive 97/23/EC

Before ordering a type-examination tested safety valve, it must be ensured that at the desired response pressure p, the maximum admissible flowqV max (= numerical value at the position of letter "G" in the component marking) of the safety valve is higher than the maximum possible flow of the system/accumulator to be secured. In this respect, the applicable regulations must be observed! According to PED 97/23/EC, the increase in the system pressure due to the flow must not exceed 10 % of the set response pressure (see component marking). The maximum admissible flow qV max stated in the component marking must not be exceeded. Discharge lines of safety valves must end in a risk-free manner. The accumulation of fluids in the discharge lines must not be possible (see AD2000 - data sheet A2). The unloading function (directional valve function with version "W") must not be used for safety functions! With version "B", the lowest adjustable pressure (circulation pressure) is set in case of power failure or cable break. With version "A", the pressure limiting function is set in case of power failure or cable break. Hydraulic counter pressures in port T with internal pilot oil return and/or port Y with external pilot oil return add 1:1 to the response pressure of the valve set at the pilot control.

Example:

Pressure adjustment of the valve due to spring pretensioning in the pilot control valve/adjustment type

pspring =200 bar

Hydraulic counter pressure in port T with internal pilot oil return

phydraulic =50 bar

⇒ Response pressure= pspring+ phydraulic =250 bar

It is imperative to observe the application notes!

In the plant, the response pressure specified in the component marking is set at a flow of 2 l/min. The maximum admissible flow specified in the component marking applies to:

External pilot oil return “Y” without counter pressure in the pilot oil return line, admissible counter pressure in the discharge line (port T) <15 bar

Internal pilot oil return "–“ without counter pressure in the discharge line (port T) With internal pilot oil return, the system pressure increases by the counter pressure in the discharge line (port T) due to the increasing flow (observe AD2000 - data sheet; A2, item 6.3).

To ensure that this increase in system pressure caused by the flow does not exceed the value of 10 % of the set response pressure, the admissible flow has to be reduced dependent on the counter pressure in the discharge line (port T) (see characteristic curves Safety instructions, Type-examination tested safety valves).

By removing a lead seal at the safety valve, the approval according to the PED becomes void Basically, the requirements of the Pressure Equipment Directive and of data sheet AD2000 A2 have to be observed! Before ordering a type-examination tested safety valve, it must be ensured that at the desired response pressure p, the maximum admissible flowqV max (= numerical value at the position of letter "G" in the component marking) of the safety valve is higher than the maximum possible flow of the system/accumulator to be secured. In this respect, the applicable regulations must be observed! According to PED 97/23/EC, the increase in the system pressure due to the flow must not exceed 10 % of the set response pressure (see component marking). The maximum admissible flow qV max stated in the component marking must not be exceeded. Discharge lines of safety valves must end in a risk-free manner. The accumulation of fluids in the discharge lines must not be possible (see AD2000 - data sheet A2). The unloading function (directional valve function with version "W") must not be used for safety functions! With version "B", the lowest adjustable pressure (circulation pressure) is set in case of power failure or cable break. With version "A", the pressure limiting function is set in case of power failure or cable break. Hydraulic counter pressures in port T with internal pilot oil return and/or port Y with external pilot oil return add 1:1 to the response pressure of the valve set at the pilot control.

Example:

Pressure adjustment of the valve due to spring pretensioning in the pilot control valve/adjustment type

pspring =200 bar

Hydraulic counter pressure in port T with internal pilot oil return

phydraulic =50 bar

⇒ Response pressure= pspring+ phydraulic =250 bar

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

Ordering code: Type-examination tested safety valves type DBA…E, component series 1X according to Pressure Equipment Directive 97/23/EC

NG	Type designation	Component marking	Maximum flow qVmax in l/min with pilot oil return		Set response overpressurep in bar
			external "Y"	internal "–"
32	1 2 3 4 5 * 6 DBAW 30 ▢▢▢N1X/▢▢6▢▢E	TÜV.SV.▢–938.22.F.G.p	600	360	111 ... 210
	1 2 3 4 5 * 6 DBAWR 30 ▢▢▢N1X/▢▢6▢▢E		700	520	211 ... 350
40	1 2 3 4 5 * 6 DBAW 40 ▢▢▢N1X/▢▢6▢▢E	TÜV.SV.▢–939.22.F.G.p	550	500	111 ... 210
	1 2 3 4 5 * 6 DBAWR 40 ▢▢▢N1X/▢▢6▢▢E		700	600	211 ... 350

1	Directional valve, normally closed	A
1	Directional valve, normally open	B
2	Standard flange	F
2	High-pressure flange	H
Adjustment type
3	Hand wheel (pressure adjustment sealed, unloading or setting of a lower response pressure possible!)	1
3	With sealed protective cap (no adjustment/unloading possible)	2
4	Pressure in the designation is to be entered by the customer, pressure adjustment ≥ 30 ... 350 bar and possible in 5 bar steps.	z. B. 150
Pilot oil supply and return
5	Internal	– 1)
5	Recommendation: Internal pilot oil supply, external pilot oil return (ordering code according to symbols)	Y
*	Ordering code of the electric data	z. B. EG24N9K4
6	NBR seals	no code
6	FKM seals	V
	Value entered at the factory	1X

	1) Dash “–” only required if 02= “W” and 12 and 13 = “no code” (see ordering code)

DBAW40BH2N1X/250S6EG24N9K4R12

Manufacturer: Bosch Rexroth

Material #: R901437842

Model : DBAW40BH2N1X/250S6EG24N9K4R12

More are expected on May 21, 2025

This product is eligible for factory repair.

Type DBAW…S6E...R12

Type DBAW…S6SM...B12

hydraulic

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

hydraulic

general

(measured with HLP46, ϑOil = 40 ±5 °C)

Standard version

Version “U”

Inlet pressure dependent on the flow

Maximum admissible flow qV max dependent on the counter pressure pT in the discharge line with internal pilot oil return

Type DBA 30 …-1X/…E

Type DBA 40 …-1X/…E

Type DBAW…–…

Type DBAW…Y…

Type DBAWR…–…

Type DBAWR…Y…

With directional spool valve

With directional seat valve

Admissible pressures (flange connections according to DIN ISO 6162-2)

Standardflansche, Ausführung „DBA(R)…F“

High-pressure flanges, version “DBA(R)…H“

Safety instructions: Type-examination tested safety valves type DBA…E, component series 1X according to Pressure Equipment Directive 97/23/EC

Ordering code: Type-examination tested safety valves type DBA…E, component series 1X according to Pressure Equipment Directive 97/23/EC

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