PROPORTIONAL DIRECTIONAL VALVES, PILOT OPERATED, WITHOUT ELECTRICAL POSITION FEEDBACK, WITHOUT INTEG

4WRZ

Material #: R900249813

Model : 4WRZ32W6-520-7X/6EG24N9TK4/M

Pilot-operated 2-stage proportional directional valve without integrated electronics (OBE) Control of the direction and magnitude of a flow Operation by means of proportional solenoids with central thread and detachable coil For subplate mounting: Porting pattern according to ISO 4401 Optional auxiliary operating device Spring-centered control spool

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Pilot-operated 2-stage proportional directional valve without integrated electronics (OBE) Control of the direction and magnitude of a flow Operation by means of proportional solenoids with central thread and detachable coil For subplate mounting: Porting pattern according to ISO 4401 Optional auxiliary operating device Spring-centered control spool

Pilot-operated proportional directional valves type 4WRZ(E)… and 5WRZ(E).52…

Valves of type 4WRZ(E)... are pilot-operated 4-directional valves that are actuated by means of proportional solenoids. Their function is to control the flow direction and size.

Valves of type 5WRZ(E)... are equipped with an additional port "R" (only NG52).

Set-up:

The valve basically consists of:

Pilot control valve (9) with proportional solenoids (5 and 6)

Main valve (10) with main control spool (11) and centering spring (12)

Function:

With de-energized solenoids (5, 6), the main control spool (11) is held in the central position by means of the centering spring (12)

The main control spool (11) is controlled by the pilot control valve (9); the main control spool is proportionally moved, e.g. by actuating solenoid "b" (6)

→ The control spool (2) is moved to the right, pilot oil enters the pressure chamber (13) via the pilot control valve (9) and deflects the main control spool (11) proportionally to the electric input signal

→ Connection from P to A and B to T via orifice-type cross-sections with progressive flow characteristics

Pilot oil supply to the pilot control valve internally via port P or externally via port X

Switching off the solenoid (6)

→ The control spool (2) and main control spool (11) are moved back into the central position

Depending on the spool position, flow occurs from P to A and B to T or P to B and A to T (R)

An optional manual override (14 and 15) can be used to move the control spool (2) without solenoid energization.

Notice:

Accidental activation of the manual override may lead to uncontrolled machine movements!

Notice:

Due to the design principle, internal leakage which may increase over the life cycle is inherent to the valves.

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

16

4

WRZ

7X

/

6E

G24

*

01

4 main ports

4

02

Proportional directional valve with electro-hydraulic operation and external electronics

WRZ

03

Size 10

10

Size 16

16

Size 25

25

Size 32

32

Size 52

52

04

Symbols; for the possible version, see "Symbols/Circuit diagrams"

E; E1-; E3-; W6-; W8-; W9-; EA; W6A

Rated flow NG10

05

25 l/min

25

50 l/min

50

90 l/min

85

Rated flow NG16

05

100 l/min

100

125 l/min

125

150 l/min

150

180 l/min

180

Rated flow NG25

05

220 l/min

220

325 l/min

325

Rated flow NG32

05

360 l/min

360

520 l/min

520

Rated flow NG52

05

1000 l/min

1000

06

Component series 70 ... 79 (70 ... 79: unchanged installation and connection dimensions)

7X

07

For subplate mounting

no code

For flange connection (only NG 52)

F

08

Pilot control valve NG6
Proportional solenoid with detachable coil

6E

09

Supply voltage 24 V

G24

10

Without manual override

no code

With concealed manual override

N9 1)

11

Without special type of protection

no code

Sea water-resistant

J 2)

Pilot oil supply and return

12

External pilot oil supply, external pilot oil return

no code

Internal pilot oil supply, external pilot oil return

E

Pilot oil supply internal, pilot oil return internal

ET

External pilot oil supply, internal pilot oil return

T

Electrical connection

13

Without mating connector, with connector according to DIN EN 175301-803, separate order

K43)

Without mating connector, with connector according to DIN EN 175301-804, separate order

K31 3)

14

Without pressure reducing valve

no code

With pressure reducing valve ZDR 6 DP0-4X/40YM-W80 (fixedly set)

D3

15

NBR seals

M

FKM seals

V

16

Further details in the plain text

*

1)

With version “J” → “N” instead of “N9”

2)

For data regarding the seawater-resistant version refer to data sheet 29115-M

3)

For version "J" = seawater-resistant only "K31"

For applications outside these parameters, please consult us!

general

Type

4WRZ

Size

10 16 25 32 52

Installation position

any, preferably horizontal

Ambient temperature range

°C

-20 … +70

Storage temperature range

°C

-20 … +80

Weight

For subplate mounting

kg

7.8 11.9 18.2 42.2 79.5

for flange connection

kg

77.5

with "D3"

kg

8.3 12.4 18.7 42.7 80

Sine test according to DIN EN 60068-2-6

10 cycles, 10…2000.. 10 Hz with logarithmic frequency changing speed of 1 octave/min, 5 to 57 Hz, amplitude 1.5 mm (p-p), 57 to 2000 Hz, amplitude 10g, 3 axes

Noise test according to DIN EN 60068-2-64

20…2000 Hz, amplitude 0.05g2/Hz (10gRMS) 3 axes, testing time 30 min per axis

Shock test according to DIN EN 60068-2-27

Half-sine 15g / 11 ms, 3 times in positive and 3 times in negative direction per axis, 3 axes

Damp heat according to DIN EN 60068-2-30

Variant 2: +25 °C … +55 °C, 90 % … 97 % relative humidity, 2 cycles á 24 hours

hydraulic

Size

10 16 25 32 52

Maximum operating pressure

bar

315 350

Operating pressure range

External pilot oil supply

bar

30 … 100 20 … 100

Pilot control valve without "D3", internal pilot oil return

bar

30 … 100

Internal pilot oil supply

bar

100 … 315 100 … 350

Maximum return flow pressure

Port T and R, external pilot oil return

bar

315 250 150 250

Port T, internal pilot oil return

bar

30

Port Y

bar

30

Maximum flow

l/min

170 460 870 1600 2800

Nominal flow

l/min

25
50
85
100
125
150
180
220
325
360
520
1000

Pilot flow

input signal 0 → 100%

Port X and Y

l/min

3.5 5.5 7 15.9 7

Pilot volume

switching process 0 → 100%

cm³

1.7 4.6 10 26.5 54.3

Hydraulic fluid temperature range

°C

-20 … +80

preferably

°C

-40 … +50

Viscosity range

mm²/s

20 … 380

preferably

mm²/s

30 … 46

Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1)

Pilot control valve

Class 18/16/13 according to ISO 4406 (c)

Main valve

Class 20/18/15 according to ISO 4406 (c)

Hysteresis

%

≤ 6
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.

electrical

Size

10 16 25 32 52

Voltage type

Direct voltage

Command value overlap

%

15

Maximum solenoid current

A

1.5

Solenoid coil resistance

Cold value at 20 °C

Ω

4.8

Maximum hot value

Ω

7.2

Actuated time

%

100

Maximum coil temperature 1)

°C

+ 150

Protection class according to DIN EN 60529

IP65 (with mating connector mounted and locked)

Power supply

V

24

Supply voltage range

V

19.4 … 35
1) Due to the surface temperatures occurring at the solenoid coils, the European standards ISO 13732-1 and EN 982 need to be adhered to.

Hydraulic fluid

Classification

Suitable sealing materials

Standards

Mineral oils and related hydrocarbons

HL, HLP

NBR / FKM

DIN 51524

Flame-resistant   - containing water

HFC (Fuchs HYDROTHERM 46M, Petrofer Ultra Safe 620)

NBR

ISO 12922

Important information on hydraulic fluids:

For more information and data on the use of other hydraulic fluids please contact us.

There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.).

The flash point of the process and operating medium used must be 40 K over the maximum solenoid surface temperature.

Flame-resistant - containing water:
Maximum pressure differential per control edge 175 bar
Pressure pre-loading at the tank port > 20 % of the pressure differential, otherwise increased cavitation
Life cycle as compared to operation with mineral oil HL, HLP 50 % to 100 %

(measured with HLP46, ϑÖl = 40 ±5 °C)

Rated flow 25 l/min at a valve pressure differential of 10 bar

Size 10

Rated flow 50 l/min at a valve pressure differential of 10 bar

Size 10

Rated flow 85 l/min at a valve pressure differential of 10 bar

Size 10

Transition function with stepped electric input signals (ps = 50 bar)

Rated flow 100 l/min at a valve pressure differential of 10 bar

Size 16

Rated flow 125 l/min at a valve pressure differential of 10 bar

Size 16

Rated flow 150 l/min at a valve pressure differential of 10 bar

Size 16

Rated flow 180 l/min at a valve pressure differential of 10 bar

Size 16

Transition function with stepped electric input signals (ps = 50 bar)

Size 16

Rated flow 220 l/min at a valve pressure differential of 10 bar

NG25

Rated flow 325 l/min at a valve pressure differential of 10 bar

NG25

Transition function with stepped electric input signals (ps = 50 bar)

NG25

Rated flow 360 l/min at a valve pressure differential of 10 bar

Size 32

Rated flow 520 l/min at a valve pressure differential of 10 bar

Size 32

Transition function with stepped electric input signals (ps = 50 bar)

Size 32

Rated flow 1000 l/min at a valve pressure differential of 10 bar

NG52

Transition function with stepped electric input signals (ps = 50 bar)

NG52

Symbols

With symbols E1- and W8-, the following applies:

P → A: qvmax

B → T: qv/2

P → B: qv/2

A → T: qvmax

With symbols E3- and W9-, the following applies:

P → A: qvmax

B → T: blocked

P → B: qv/2

A → T: qvmax

(Differential circuit, piston top at port A)

Notice:
With symbols W6-, W8-, W9- and W6A, there is - in the “0” spool position - a connection from A →T and B → T with less than 2% of the relevant nominal cross-section.

Pilot oil supply

3 Switching positions

2 Switching positions

(Version ".A)"

Type 4WRZ …

External pilot oil supply, external pilot oil return

The pilot oil is supplied from a separate control circuit (external). The pilot oil return is not directed into channel T of the main valve, but is separately directed to the tank via port Y (external).

Type 4WRZ …E…

Internal pilot oil supply, external pilot oil return

The pilot oil supply is implemented from channel P of the main valve (internally). The pilot oil return is not directed into channel T of the main valve, but is separately directed to the tank via port Y (external).

In the subplate, port X is to be closed.

Type 4WRZ …ET…

Internal pilot oil supply; internal pilot oil return

The pilot oil supply is implemented from channel P of the main valve (internally). The pilot oil is directly returned to channel T of the main valve (internally).

In the subplate, ports X and Y are to be closed.

Type 4WRZ …T…

External pilot oil supply, internal pilot oil return

The pilot oil is supplied from a separate control circuit (external). The pilot oil is directly returned to channel T of the main valve (internally).

In the subplate, port Y is to be closed.

Connection at mating connector

Connection at connector

Size 10

Dimensions in mm

1

Main valve

2

Pilot control valve

3

Dimension for version 4WRZ (not seawater-resistant)

4

Dimension for version 4WRZE

5

Proportional solenoid "a"

6

Proportional solenoid "b"

7

Mating connector "A", color gray, separate order

8

Mating connector "B", color black, separate order

9

Mating connector according to DIN EN 175201-804, separate order

10

Concealed manual override “N9”

11

Plug screw for valve with one solenoid

12

Name plate pilot control valve

13

Name plate main valve

14

Integrated electronics (OBE)

15

"D3” pressure reducing valve

16

Identical seal rings for ports A, B, P and T (T1)

17

Identical seal rings for ports X and Y

18

Space required to remove the mating connector

19

Diversion plate

20

Machined valve contact surface; Porting pattern according to ISO 4401-05-05-0-05
- Ports X and Y as required

Recommended valve mounting screws (separate order):

4 hexagon socket head cap screws ISO 4762 - M6 x 45 - 10.9-flZn-240h-L

Tightening torque MA = 13.5 Nm ± 10 %, material no. R913000258 or

4 hexagon socket head cap screws ISO 4762 - M6 x 45 - 10.9

Tightening torque MA = 15.5 Nm ± 10 %

Size 16

Dimensions in mm

1

Main valve

2

Pilot control valve

3

Dimension for version 4WRZ (not seawater-resistant)

4

Dimension for version 4WRZE

5

Proportional solenoid "a"

6

Proportional solenoid "b"

7

Mating connector "A", color gray, separate order

8

Mating connector "B", color black, separate order

9

Mating connector according to DIN EN 175201-804, separate order

10

Concealed manual override “N9”

11

Plug screw for valve with one solenoid

12

Name plate pilot control valve

13

Name plate main valve

14

Integrated electronics (OBE)

15

"D3” pressure reducing valve

16

Identical seal rings for ports A, B, P, and T

17

Identical seal rings for ports X and Y

18

Space required to remove the mating connector

19

Diversion plate

20

Machined valve contact surface; Porting pattern according to ISO 4401-07-07-0-05
Deviating from the standard:
Ports P, A, B, T Ø20 mm
Minimum screw-in depth:
- Ferrous metal 1.5 x Ø
- Non-ferrous metal 2 x Ø

21

Locking pin

Recommended valve mounting screws (separate order):

2 hexagon socket head cap screws ISO 4762 - M6 x 60 - 10.9-flZn-240h-L

Tightening torque MA = 12.2 Nm ± 10 % , material no. R913000115

4 hexagon socket head cap screws ISO 4762 - M10 x 60 - 10.9-flZn-240h-L

Tightening torque MA = 58 Nm ± 20 %, material no. R913000116 or

2 hexagon socket head cap screws ISO 4762 - M6 x 60 - 10.9

Tightening torque MA = 15.5 Nm ± 10 %

4 hexagon socket head cap screws ISO 4762 - M10 x 60 - 10.9

Tightening torque MA = 75 Nm ± 20 %

NG25

Dimensions in mm

1

Main valve

2

Pilot control valve

3

Dimension for version 4WRZ (not seawater-resistant)

4

Dimension for version 4WRZE

5

Proportional solenoid "a"

6

Proportional solenoid "b"

7

Mating connector "A", color gray, separate order

8

Mating connector "B", color black, separate order

9

Mating connector according to DIN EN 175201-804, separate order

10

Concealed manual override “N9”

11

Plug screw for valve with one solenoid

12

Name plate pilot control valve

13

Name plate main valve

14

Integrated electronics (OBE)

15

"D3” pressure reducing valve

16

Identical seal rings for ports A, B, P, and T

17

Identical seal rings for ports X and Y

18

Space required to remove the mating connector

19

Diversion plate

20

Machined valve contact surface; Porting pattern according to ISO 4401-08-08-0-05 (ports X and Y as required)

21

Locking pin

Recommended valve mounting screws (separate order):

6 hexagon socket head cap screws ISO 4762 - M12 x 60 - 10.9-flZn-240h-L

Tightening torque MA = 100 Nm ± 20 %, material no. R913000121 or

6 hexagon socket head cap screws ISO 4762 - M12 x 60 - 10.9

Tightening torque MA = 130 Nm ± 20 %

Size 32

Dimensions in mm

1

Main valve

2

Pilot control valve

3

Dimension for version 4WRZ (not seawater-resistant)

4

Dimension for version 4WRZE

5

Proportional solenoid "a"

6

Proportional solenoid "b"

7

Mating connector "A", color gray, separate order

8

Mating connector "B", color black, separate order

9

Mating connector according to DIN EN 175201-804, separate order

10

Concealed manual override “N9”

11

Plug screw for valve with one solenoid

12

Name plate pilot control valve

13

Name plate main valve

14

Integrated electronics (OBE)

15

"D3” pressure reducing valve

16

Identical seal rings for ports A, B, P, and T

17

Identical seal rings for ports X and Y

18

Space required to remove the mating connector

19

Diversion plate

20

Machined valve contact surface; Porting pattern according to ISO 4401-10-09-0-05 (Ports X and Y as required)
Deviating from the standard:
‒ Ports P, A, B and T Ø38 mm
‒ position G11) according DIN 24340 Form A

21

Locking pin

Recommended valve mounting screws (separate order):

6 hexagon socket head cap screws ISO 4762 - M20 x 80 - 10.9-flZn-240h-L

Tightening torque MA = 340 Nm ± 20 %, material no. R901035246 or

4 hexagon socket head cap screws ISO 4762 - M20 x 80 - 10.9

Tightening torque MA = 430 Nm ± 20 %

NG52

Dimensions in mm

1

Main valve

2

Pilot control valve

3

Dimension for version 4WRZ (not seawater-resistant)

4

Dimension for version 4WRZE

5

Proportional solenoid "a"

6

Proportional solenoid "b"

7

Mating connector "A", color gray, separate order

8

Mating connector "B", color black, separate order

9

Mating connector according to DIN EN 175201-804, separate order

10

Concealed manual override “N9”

11

Plug screw for valve with one solenoid

12

Name plate pilot control valve

13

Name plate main valve

14

Integrated electronics (OBE)

15

Space required to remove the mating connector

16

Adapter plate

17

"D3” pressure reducing valve

18

Diversion plate

19

Transport aid

Recommended valve mounting screws (separate order):

4 hexagon socket head cap screws ISO 4762 - M12 x 70 - 10.9-flZn-240h-L

Tightening torque MA = 100 Nm ± 20 %, material no. R913000515 or

4 hexagon socket head cap screws ISO 4762 - M12 x 70 - 10.9

Tightening torque MA = 130 Nm ± 20 %

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