Contact Us (888) 651-5712

BOSCH REXROTH
4WH6D5X/SO135
R978909997
Directional Spool Valves

Direct. spool valves: WH 6.-5x/

$465.00

BOSCH REXROTH

MATERIAL:  R978909997

SUMMARY:  Direct. spool valves: WH 6.-5x/

Quantity in stock: 1

Add to Cart

General information

Valves of type WH are fluidically actuated directional spool valves. They control the start, stop and direction of a flow.

The directional valves basically consist of housing (1), one or two actuation elements (2) (hydraulic actuation cylinder), control spool (3) and one or two return springs (4). The ports for the control are positioned radially (5).

When de-energized, the control spool (3) is held in the central position or in the initial position by the return springs (4) (except impulse spool).

The control spool (3) is moved to the desired spool position by means of the actuation elements.

Throttle insert

The use of a throttle insert is required when due to prevailing operating conditions, flows can occur during the switching processes, which exceed the performance limit of the valve.

It is inserted in channel P of the directional valve.

 

Typ 4WH 6 E5X/...

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

Without spring return, with detent,

version ..OF/..

Directional valves with hydraulic actuation are also available as a 2-spool position valve with detent (7). If actuation elements with detent are used, each spool position can be locked.

Without spring return,

version ..O/..

If actuation elements without return springs and without detent are used, there is no defined spool position in the de-energized state.

Type 4WP 6 C6X/OF/N...

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

01

02

03

04

05

06

07

08

9

10

11

12

13

14

15

16

W

H

no code

6

5X

/

J

/

*

01

3 main ports

3

4 main ports

4

02

Directional valve

W

Type of actuation

03

hydraulic

H

04

Ports radial

no code

05

Size 6

6

06

Spool symbol, e. g. C, E, EA, EB etc.

2)

07

Component series 50 … 59 (50 … 59: unchanged installation and connection dimensions)

5X

08

With spring return

no code

Without spring return

O

Without spring return with detent

OF

09

Improved corrosion protection

3)

J

10

Without manual override

no code

With manual override

N3)

Spool position monitoring

7)

11

Without position switch

no code

Monitored spool position "a"

QMAG24

Monitored spool position "b"

QMBG24

Monitored rest position

QM0G24

12

Without throttle insert

no code

Throttle Ø 0.8 mm

B086)

Throttle Ø 1.0 mm

B106)

Throttle Ø 1.2 mm

B126)

Seal material

13

NBR seals

no code

FKM seals

V

Observe compatibility of seals with hydraulic fluid used. (Other seals upon request)

Clamping length

14

42 mm (standard)

no code

22 mm

Z

15

Without locating hole

no code

With locating hole

/605)

With locating hole and locking pin ISO 8752-3x8-St

/62

16

Further details in the plain text

*

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

Switching positions

2

3

Type WH

no code

O

OF

● = available

1) Not with version “N”
2) For symbols and example, see Symbols and Types of actuation
3) The external parts made of metal are galvanized, treated with an anti-corrosion agent or made of stainless steel. This design is also suitable for on-wall applications.
5) Locking pin ISO 8752-3 x 8-St, material no. R900005694, separate order
6) Use if volume flow > performance limits of the valve, effective in channel P.
7) Not for version “J”

general

Size

6

Weight (approx.)

Valve with one actuation cylinder

kg

2

Valve with two actuation cylinders

kg

2.2

Installation position 1)

any

Ambient temperature range

NBR seals

°C

-30 … +80

FKM seals

°C

-20 … +80
1) With version ../O.. (A, C and D) : horizontal

hydraulic

Size

6

Maximum operating pressure

Port P

bar

315

Port A

bar

315

Port B

bar

315

Port T 1)

bar

160

Maximum flow

l/min

60

Flow cross-section (spool position 0)

Symbol Q

mm2

approx. 6 % of nominal cross-section

Symbol W

mm2

approx. 3 % of nominal cross-section

Minimum pilot pressure 2)

bar

6

Maximum pilot pressure

bar

200

Pilot volume

cm³

1.23

Hydraulic fluid

see table

Hydraulic fluid temperature range

NBR seals

°C

-30 … +80

FKM seals

°C

-20 … +80

Viscosity range

mm²/s

2.8 … 500

Maximum admissible degree of contamination of the hydraulic fluid 3)

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

Maximum switching frequency

Hz

2
1) With symbols A and B, port T must be used as leakage oil connection if the operating pressure exceeds the admissible tank pressure.
2) 6 ... 10 bar > tank pressure, performance limits dependent on the minimum pilot pressure, see chapter "Diagrams/characteristic curves", section "Performance limits"
3) 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

Mineral oil

HL, HLP

FKM, NBR

DIN 51524

Bio-degradable

Insoluble in water

HEES (synthetic esters)

FKM

VDMA 24568

HETG (rape seed oil)

FKM, NBR

Soluble in water

HEPG (polyglycols)

FKM

VDMA 24568

Other hydraulic fluids on request

Inductive position switch type QM: electrical connection

The electric connection is realized via a 4-pole mating connector (separate order) with connection thread M12 x 1.

electrical

Connection voltage (DC voltage)

V

24

Voltage tolerance (connection voltage)

+30 %/-15 %

Admissible residual ripple

%

≤ 10

Max. load capacity

mA

400

Switching outputs

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/
PNP transistor outputs, load between switching outputs and GND

Pinout

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

1

V

24

2, 4

Switching output

mA

400

3

Earthing (GND)

V

0

For applications outside these parameters, please consult us!

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

Δp-qV characteristic curves

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

Symbol

Direction of flow

P-A

P-B

A-T

B-T

A

3

3

B

3

3

C

1

1

3

1

D

5

5

3

3

E

3

3

1

1

F

1

3

1

1

G

6

6

9

9

H

2

4

2

2

J

1

1

2

1

L

3

3

4

9

M

2

4

3

3

P

3

1

1

1

Q

1

1

2

1

R

5

5

4

T

10

10

9

9

U

3

3

9

4

V

1

2

1

1

W

1

1

2

2

Y

5

5

3

3

Further characteristic curves:

7

Symbol “R” in switching position “b” (B → A)

8

Symbol “G” and “T” in central position (P → T)

9

Symbol “H” in central position (P → T)

Minimum pilot pressure dependent on the tank pressure

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

At a higher tank pressure, the minimum pilot pressure has to be increased according to this diagram.

Performance limits

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

 

Notice!

The switching function of the valves is independent from the filtration due to the adhesive effect. To achieve the specified admissible flow values, a full flow filtration with 25 μm is recommended. The flow forces acting within the valves also influence the flow performance.

With 4-way directional valves, the specified flow data are therefore valid for normal operation with 2 directions of flow (e. g. from P to A and simultaneous return flow from B to T).

If there is only one direction of flow, the admissible flow may be significantly lower in critical cases (e. g. if a 4-way directional valve is used as a 3-way directional valve due to blocked port A or B).

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

Pilot pressure 6 bar > tank pressure

Spring return

Characteristic curve

Symbol

“no code”
(with spring return)

1

A, B

2

C, D, Y

3

E, J, L, U, M, Q, V, W, E1-

4

F, P

5

T

6

G, H

7

R

../O..

8

A, C, D

../OF..

Pilot pressure 10 bar > tank pressure

Spring return

Characteristic curve

Symbol

“no code”
(with spring return)

1

A, B

8

C, D, Y, E, G, H, J, L, U, M, Q, V, W, E1-

9

F, P

 

10

R

11

T

../O..

8

A, C, D

../OF..

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

Attention!

Caution in conjunction with differential cylinders due to pressure intensification!

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/
1) Example:
– Symbol E with spool position "a" → ordering code ..EA..
– Symbol E with spool position “b” → ordering code ..EB..
2) Symbol E1-: P → A/B pre-opening

Ordering code

Type of actuation

Symbol

Actuation side

Spool return

A, C, D

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

../O..

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

../OF..

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

B, Y

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

E, F

G, H

J, L

M, P

Q, R

T, U

V, W

a = A

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

b = B

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/
technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

Dimensions in mm

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/
technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/

Required surface quality of the valve contact surface

L1

L2

L3

L4

L5

mm

mm

mm

mm

mm

22.5 64.5 48 90 138

1

Valve with 2 spool positions and 2 actuation cylinders

Valve with 3 spool positions and 2 actuation cylinders

2

Actuation cylinder “a”

3

Actuation cylinder “b”

4

Cover for valve with 1 actuation cylinder (2 spool positions)

5

Same seal rings for ports A, B, P, T

6

Name plate

7

Porting pattern according toISO 4401-03-02-0-05 (with locating hole for locking pin ISO 8752-3x8-St, material no. R900005694, separate order)

8

Connection

9

Port with version “WHZ”

11

Alternative clamping length (): 22 mm

Subplates according to data sheet 45052 (separate order)

(without locating hole)

G 341/01 (G1/4)

G 342/01 (G3/8)

G 502/01 (G1/2)

(with locating hole)

G 341/60 (G1/4)

G 342/60 (G3/8)

G 502/60 (G1/2)

G 341/12 (SAE-6)1)

G 342/12 (SAE-8)1)

G 502/12 (SAE-10)1)

 

1) On request

 

 

Valve mounting screws (separate order)

Clamping length 42 mm:

4 hexagon socket head cap screws, metric

ISO 4762-M5 x 50-10.9-flZn-240h-L

(friction coefficient μtotal = 0.09 to 0.14);

tightening torque MA = 7 Nm ± 10 %,

material no. R913000064

or

4 hexagon socket head cap screws

ISO 4762-M5 x 50-10.9 (self procurement)

(friction coefficient μtotal = 0.12 to 0.17);

tightening torque MA = 8.1 Nm ± 10 %

4 hexagon socket head cap screws UNC

10-24 UNC x 2″ ASTM-A574

(friction coefficient μtotal = 0.19 to 0.24);

tightening torque MA = 11 Nm± 15 %,

(friction coefficient μtotal = 0.12 to 0.17);

tightening torque MA = 8 Nm ± 10 %,

material no. R978800693

Clamping length 22 mm:

4 hexagon socket head cap screws, metric

ISO 4762-M5 x 30-10.9-flZn-240h-L

(friction coefficient μtotal= 0.09 to 0.14);

tightening torque MA = 7 Nm ± 10 %,

material no. R913000316

or

4 hexagon socket head cap screws

ISO 4762-M5 x 30-10.9 (self procurement)

(friction coefficient μtotal = 0.12 to 0.17);

tightening torque MA = 8.1 Nm± 10 %

4 hexagon socket head cap screws UNC

10-24 UNC x 1 1/4 ″

(friction coefficient μtotal = 0.19 to 0.24);

tightening torque MA = 11 Nm± 15 %,

(friction coefficient μtotal = 0.12 to 0.17);

tightening torque MA = 8 Nm± 10 %,

material no. R978802879

Spool position monitoring

Inductive position switch type QM

Dimensions in mm

technical illustration-4WH6D5X/SO135-Direct. spool valves: WH 6.-5x/
1) For dimensions, see valve dimensions

Notice:

The dimensions are nominal dimensions which are subject to tolerances.