PUMP SAFETY BLOCK

DBAW...1X

Material #: R900930445

Model : DBAW30BH2N1X/350-6EG24N9K4

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

This product is not available. Please call 888-REXROTH to speak to a local distrubutor who can assist in locating your part or a suitable replacement

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

With check valve

R 1)

04

Size 32

30

Size 40

40

05

Normally closed

A 2)

Normally open

B 2)

Connection / SAE flange

3)

06

Standard flange (200 … 350 bar)

F

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

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)

Internal pilot oil supply, external pilot oil return

Y

12

Standard version

no code

Valve for minimum cracking pressure (not suitable for mutual relief!)

U

13

Without switching shock damping

no code

With switching shock damping

S

14

With directional spool valve (data sheet 23178)

6E 2)

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)

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

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

 

 

HEES

FKM

Soluble in water

HEPG

FKM

VDMA 24568

 

 

Containing water

Water-free

HFDU, HFDR

FKM

 

ISO 12922

 

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

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

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

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

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

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

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

Directional valve, normally open

B

2

Standard flange

F

High-pressure flange

H

Adjustment type

3

Hand wheel (pressure adjustment sealed, unloading or setting of a lower response pressure possible!)

1

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)

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

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)