PRESSURE RELIEF VALVE, PILOT CONTROLLED

DBW…W65

Material #: R900929270

Model : DBW15BG2-4X/315-6EW110N9K4W6

For threaded connection 4 adjustment types for pressure adjustment, optionally
• Rotary knob
• Sleeve with hexagon and protective cap
• Lockable rotary knob with scale
• Rotary knob with scale 4 pressure ratings Solenoid-operated unloading via built-on directional spool valve

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For threaded connection 4 adjustment types for pressure adjustment, optionally
• Rotary knob
• Sleeve with hexagon and protective cap
• Lockable rotary knob with scale
• Rotary knob with scale 4 pressure ratings Solenoid-operated unloading via built-on directional spool valve

Valves of type DBW are pilot-operated pressure relief valves. They are used for limitation and solenoid-actuated unloading of the operating pressure.

The valves basically consist of housing (1) and pilot control valve (2) with adjustment type.

The pressure applied to channel P acts on the main spool (3). Via the nozzle bores (4 and 5), the pressure is at the same time applied to poppet (6). If the pressure in channel P exceeds the value set at spring (7), poppet (6) opens against spring (7). Via the nozzle bores (4 and 5), the hydraulic fluid from channel P now flows into the spring chamber (8). From here, it is led into the tank internally (version "–"), via the control line (9 and 10), or externally (version "Y") via the control line (9 and 11).

Due to the state of equilibrium at the main spool (3), hydraulic fluid flows from channel P to channel T, maintaining the set operating pressure.

A pressure gauge connection (12) allows for the control of the operating pressure.

The pressure relief valve can be unloaded or switched to another pressure (second pressure rating) via port X (13).

The main spool (3) is unloaded by controlling a built-on directional valve.

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

16

17

DB

W

G

4X

/

6E

K4

W65

*

Type

01

Pressure relief valve

DB

02

With attached directional valve

W

Size

03

Size 10

Threaded connection "G" (G1 1/2)

10

Size 25

Threaded connection "G" (G3/4)

15

Threaded connection "G" (G1)

20

Type of connection

04

Normally closed

A

Normally open

B

05

Threaded connection

G

Adjustment type

06

Rotary knob

1

Sleeve with hexagon and protective cap

2

Lockable rotary knob with scale

3 1)

Rotary knob with scale

7

Component series

07

Component series 40 ... 49 (40 ... 49: unchanged installation and connection dimensions)

4X

Pressure rating

08

Set pressure up to 50 bar

50

Set pressure up to 100 bar

100

Set pressure up to 200 bar

200

Set pressure up to 315 bar

315

Pilot oil supply and pilot oil return (see also Symbols)

09

Pilot oil supply and pilot oil return, internal

– 2)

External pilot oil supply, internal pilot oil return

X

Internal pilot oil supply, external pilot oil return

Y

Pilot oil supply and pilot oil return external

XY

Version

10

Standard version

no code

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

U

11

With directional spool valve (data sheet 23178)

6E

12

Direct voltage 24 V

G24

Alternating voltage 230 V, 50/60 Hz

W230

Manual override

13

With concealed manual override (standard)

N9

With manual override

N

Electrical connection

14

without mating connector with connector DIN EN 175301-803

K4

Seal material

15

NBR seals

no code

FKM seals

V

(other seals upon request) Attention! Observe compatibility of seals with hydraulic fluid used!

Installation position

16

Vertical installation position of the screw-in cartridge valve (cartridge)

W65

17

Further details in the plain text

*

1)H-key with material no. R900008158 is included in the scope of delivery.
2)Dash "–" only without specification of "U".

Notice:

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

general

Size

10 25

Weight

Threaded connection "G"

kg

4.25

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).

hydraulic

Size

10 25

Maximum operating pressure

Port P

bar

350

Port X

bar

350

Port T

bar

315

Maximum counter pressure

Port Y (DC solenoid)

bar

210

Port Y (AC solenoid)

bar

160

Port T (DC solenoid)

bar

210

Port T (AC solenoid)

bar

160

Minimum set pressure

flow-dependent, see characteristic curves

Maximum set pressure

bar

50
100
200
315

Maximum flow

G3/4 G1

Threaded connection "G"

l/min

150 200 300

Hydraulic fluid

see table below

Hydraulic fluid temperature range

NBR seals

°C

-20 … +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.

Hydraulic fluid

Classification

Suitable sealing materials

Standards

Data sheet

Mineral oils

HL, HLP

NBR, FKM

DIN 51524

90220

Bio-degradable

Insoluble in water

HETG

FKM

ISO 15380

90221

HEES

FKM

Soluble in water

HEPG

FKM

ISO 15380

90221

Important information on hydraulic fluids:

For further information and data on the use of other hydraulic fluids, please refer to the data sheets above or contact us. There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.). The ignition temperature of the hydraulic fluid used must be 50 K higher than the maximum surface temperature.

Bio-degradable:

If this hydraulic fluid is used, small amounts of dissolved zinc may get into the hydraulic system.

Notice:

Technical data for directional spool valve see data sheet 23178.

For applications outside these parameters, please consult us!

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

Inlet pressure dependent on the flow

Threaded connection

Minimum set pressure and circulation pressure dependent on the flow 1)
Standard version

1) The characteristic curves apply to the pressure at the valve output pT = 0 bar across the entire flow range.

Minimum set pressure and circulation pressure dependent on the flow 1)
Version “U”

1) The characteristic curves apply to the pressure at the valve output pT = 0 bar across the entire flow range.

Notices!

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.

Type DBW…–…

Type DBW…X…

Type DBW…Y…

Type DBW…XY…

Threaded connection

Dimensions in mm

1

Name plate

2

Port X for remote control, optional

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

Lock nut SW22, tightening torque MA = 10±5 Nm

9

Hexagon SW10

10

Hexagon SW30, tightening torque MA = 50 Nm

11

Space required to remove the key

17

Grub screw is omitted with internal pilot oil return

18

Directional spool valve NG6 (data sheet 23178)

19

Mating connector without circuitry (separate order)

20

Mating connector with circuitry (separate order)

21

Dimension for valve without manual override

22

Dimension for valve with manual override "N"

23

Dimension for valve with concealed manual override "N9"

24

Housing for version "W“

25

Space required to remove the mating connector

26

Valve contact surface; port A is not bored

27

Space required to remove the solenoid coil

Version

D1

ØD2

mm

DB.10.G G1/2 34
DB.15.G G3/4 42
DB.20.G G1 47

Mounting cavity

Version "XY" and type-examination tested safety valves version "Y…E"

Dimensions in mm

1) Installation depth

Required surface quality of the valve contact surface

37

Bore X, Y and T optionally at the circumference for version "XY"

Bore T optionally at the circumference for version "Y" (no separate bore Y required; pilot oil return via bore T)

38

Depth of fit

39

Bore Ø2.5 mm is only to be bored if required

40

Port X does not have to be bored for type-examination tested safety valves version "Y…E" as it does not have any function!

Version “Y”

Dimensions in mm

1) Installation depth

Required surface quality of the valve contact surface

37

Bore X, Y and T optionally at the circumference for version "XY"

Bore T optionally at the circumference for version "Y" (no separate bore Y required; pilot oil return via bore T)

38

Depth of fit

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 (item 7 on Product description) in the pilot control valve/adjustment type

pspring = 200 bar

 

Hydraulic counter pressure in port T with internal pilot oil returnphydraulic = 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