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BOSCH REXROTH
R978914195


$1,301.00
  • BOSCH REXROTH
  • Material:R978914195
  • Model:4WH22H7X/S

Due to extremely high demand, please call 920-337-0234 for availability



Size 22, symbol H, electrical with solenoid

Industrial hydraulic valve in a high performance range. Reliable switching of the oil flow direction according to hydraulic symbol.

Unpacked Weight: 11.300 kg

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Valve type WH is a directional spool valve with hydraulic actuation. It controls the start, stop and direction of a flow. The directional valve basically consists of the valve housing (1), the main control spool (2), one or two return springs (3.1) and (3.2) at valves with spring return or spring centering as well as the diversion plate (11). The main control spool (2) is actuated directly by pressurization. The main control spool (2) is held in zero or initial position by springs or pressurization. Pilot oil supply and return are external (see pilot oil supply).

4/3 directional valve with spring centering of the control spool

With this version, the main control spool (2) is held in zero position by two return springs (3.1) and (3.2). The two spring chambers (6) and (8) are connected to ports X and Y via the diversion plate (11). With pilot pressure loading of one of the two front sides of the main control spool (2), the spool is moved to the switching position. In the valve, the required ports are connected in this way. The spring on the opposite side returns the spool to the zero or initial position at pressure relief of the pressurized control spool area.

Pilot oil supply (schematic illustration)

NG10

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Pilot oil supply (schematic illustration)

NG16

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Pilot oil supply (schematic illustration)

NG25 („W.H 22“)

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Pilot oil supply (schematic illustration)

NG25 („W.H 25“)

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Pilot oil supply (schematic illustration)

Size 32

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Pilot oil supply

Pilot oil return

External

2, 3

closed

External

1

closed

Internal

2, 3

open

Internal

1

open

1

Plug screw M6 according to DIN 906, wrench size 3 - Pilot oil return

2

Plug screw M12 x 1.5 according DIN 906, wrench size 6
- pilot oil supply

3

Plug screw M12 x 1.5 according DIN 906, wrench size 6
- pilot oil supply

Type WH…

The pilot oil supply and return is implemented externally via channel X and Y.

External pilot oil supply, external pilot oil return
Spool valve
Pilot-operated
Size 10 … 32
Maximum operating pressure 350 bar
Maximum flow 1100 l/min
Component series 4X, 7X, 6X
Spool symbolSymbol H
Max. pressure280
Productgroup ID9,10,11,12,13,14
Number of ports4
Type of actuationwith hydraulic actuation
Size22
Max. flow450
Type of connectionSubplate mounting
Connection diagram NFPANFPA T3.5.1 R2-2002 D08
Size_CETOP0
Connection diagramISO 4401-08-08-0-05
Number of switching positions3
Weight11.300
SealsNBR
Hydraulic fluidHL,HLP,HLPD,HVLP,HVLPD,HFC
Hydraulic fluidHL,HLP,HLPD,HVLP,HVLPD,HFC

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

WH

/

/

*

01

up to 280 bar

no code

02

3-way version

3

4-way version

4

Type of actuation

03

hydraulic

WH

Size

04

NG10

10

NG16

16

NG25 (version "WH 22")

22

NG25 (version "WH 25")

25

Size 32

32

Spool return in the main valve

05

by means of springs

no code

hydraulic

1)

H

06

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

07

Component series 40 … 49 (40 … 49: unchanged installation and connection dimension) – NG10

4X

Component series 60 … 69 (60 … 69: unchanged installation and connection dimension) – NG25 ("WH 25") and NG32

6X

Component series 70 … 79 (70 … 79: unchanged installation and connection dimension) – NG16 (from series 72) andNG25 ("WH 22")

7X

Pilot oil flow

08

External pilot oil supply, external pilot oil return

2)

no code

Switching time adjustment

09

without switching time adjustment

no code

Switching time adjustment as supply control

S

Switching time adjustment as discharge control

S2

Corrosion resistance (outside)

10

None (valve housing primed)

no code

Improved corrosion protection (240 h salt spray test according to EN ISO  9227)

J3

Spool position monitoring

11

Without position switch

no code

Monitored spool position “a”

QMAG24

Monitored spool position “b”

QMBG24

monitored spool position "a" and "b"

QMABG24

Monitored rest position

QM0G24

Stroke setting

12

For ordering code, see dimesnions

preload valve (not for NG10)

2)

13

without pressure reducing valve

no code

with pressure reducing valve

D3

Seal material

14

NBR seals

no code

FKM seals

V

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

15

Further details in the plain text

*

1) – 2 spool positions (hydraulic end position): only symbols C, D, K, Z, Y
– 3 switching positions (hydraulically centered): only NG16, NG25 ("4W.H 25") and NG32
2) Pilot oil supply X or return Y external:
– Minimum pilot pressure: please observe Technical data!
– Maximum pilot pressure: please observe Technical data!

general

Size

10 16 25 (WH 22) 25 (WH 25) 32

Weight (approx.)

Valve witch hydraulic actuation (type WH...)

kg

5.5 7.3 10.5 16.5 39.5

Switching time adjustment "S" and "S2"

kg

0.8

Pressure reducing valve "D3"

kg

0.4

Installation position

Any; horizontal with valves with hydraulic control spool return "H" and symbol A, B, C, D, K, Z, Y. With suspended installation, higher sensitivity to contamination – horizontal is recommended.

Ambient temperature range

Standard version

°C

-20 … +70

Storage temperature range

°C

+5 … +40

Surface protection

Valve body

Coating, layer thickness max. 100 μm

MTTFD values according to EN ISO 13849

Years

150

hydraulic

Size

10 16 25 (WH 22) 25 (WH 25) 32

Maximum operating pressure

Port P

bar

280

Port A

bar

280

Port B

bar

280

Port T

External pilot oil return Y

bar

280 250

Port Y

Pilot oil return, external

bar

250 210 250

Hydraulic fluid

see table

Hydraulic fluid temperature range

NBR seals 1)

°C

-20 … +80

FKM seals 1)

°C

-15 … +80

HFC hydraulic fluid

-20 … +50 °C

Viscosity range

mm²/s

2.8 … 500

Maximum admissible degree of contamination of the hydraulic fluid 2)

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

Maximum pilot pressure

bar

250 210 250

Minimum pilot pressure

Pilot oil supply X external or internal (with symbols D, K, E, J, L, M, Q, R, U, W)

2-spool position valve, hydraulic end position

bar

7 14 8 5

Internal pilot oil supply X (with symbols C, F, G, H, P, T, V, Z, S)

bar

7.5 3) 4.5 4) 5) 4.5 5)

Pilot volume for switching process

3-spool position valve, spring-centered

cm³

2.04 5.72 7.64 14.2 29.4

2-spool position valve

cm³

4.08 11.45 15.28 28.4 58.8

3-spool position valve, pressure-centered

from zero position in switching position “a”

cm³

- 2.83 - 7.15 14.4

from switching position “a” in zero position

cm³

- 5.72 - 14.18 29.4

from zero position in switching position “b”

cm³

- 5.72 - 14.18 29.4

from switching position “b” in zero position

cm³

- 8.55 - 19.88 43.8

Pilot flow for shortest switching time, approx.

l/min

35 45
1) If type WH is used in potentially explosion-proof areas, see data sheet 07011.
2) 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.
3) For symbols C, F, G, H, P, T, V, Z, an internal pilot oil supply is only possible if the flow from P → T in the central position (for 3-spool position valve) or while crossing the central position (for 2-spool position valve) is so large that the pressure differential of P → T reaches a value of at least 6.5 bar.
4) Spool S only for NG16
5) For spools C, F, G,J, H, P, T, V, Z, S – by means of preload valve (not NG10) or correspondingly high flow. (Determination of the required flow, see preload valve)

Free flow cross-sections in zero position with spools Q, V and W

Size

10 16 25 (WH 22) 25 (WH 25) 32

Spool Q

A – T; B – T

mm²

13 32 78 83 78

Spool V

P – A

mm²

13 32 73 83 73

A – T; B – T

mm²

13 32 84 83 84

Spool W

A – T; B – T

mm²

2.4 6 10 14 20

Hydraulic fluid

Classification

Suitable sealing materials

Standards

Data sheet

Mineral oil

HL, HLP, HLPD, HVLP, HVLPD

NBR, FKM

DIN 51524

90220

Bio-degradable

Insoluble in water

HETG

FKM

ISO 15380

90221

HEES

FKM

Soluble in water

HEPG

FKM

ISO 15380

Flame-resistant

Water-free

HFDU (glycol base)

FKM

ISO 12922

90222

HFDU (ester base)

FKM

HFDR

FKM

Important notice on hydraulic fluids:

For more 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 solenoid surface temperature.

 

• Bio-degradable and flame-resistant:

If these hydraulic fluids are used, small amounts of dissolved zinc may get into the hydraulic system (700 mg zinc per pole tube).

 

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-R978914195-Size 22, symbol H, electrical with solenoid
PNP transistor outputs, load between switching outputs and GND

Pinout

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

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 °C ±5 °C)

NG10

Δp-qV characteristic curves

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Symbol

Spool position

Zero position

P – A

P – B

A – T 1)

B – T 1)

A – T

B – T

P – T

E, Y, D, Q, V, W, Z

1

1

3

5

F

1

3

1

4

3

6

G, T

4

2

4

7

8

H, C

3

3

1

7

1

5

5

J, K

1

2

1

6

L

2

2

1

4

2

M

3

3

2

5

P

3

1

2

7

5

7

R

1

1

2

3

U

2

2

3

6

6

A, B

1

1

1

1) The pressure differential refers to the use of port T. If port T1 is additionally used,the pressure differential maybe lower. If only port T1 is used, the relations A – T and B – T may be reversed.

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

NG10

2-spool position valve – qV maxin l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring end position in the main valve1) (with ppilot min = 12 bar)

C, D, K, Y, Z

160

160

160

160

160

X external – hydraulic end position in the main valve

HC, HD, HK, HZ, HY

160

160

160

160

160

1) If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails!

NG10

3-spool position valves – qV max in l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring-centered

E, J, L, M, Q, U, V, W, R

160

160

160

160

160

F, P

160

120

100

90

90

G, T

160

160

160

130

120

H

160

160

120

110

100

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

NG16

Δp-qV characteristic curves

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Symbol

Spool position

Zero position

P –A

P – B

A – T

B – T

P – T

A – T

B – T

D, E, Y

1

1

3

3

F

1

2

5

5

4

3

G

4

1

5

5

7

C, H

1

1

5

6

2

4

4

K, J

2

2

6

6

3

L

2

2

5

4

3

M

1

1

3

4

P

2

1

3

6

5

Q

1

1

6

6

R

2

4

7

S

3

3

3

9

T

4

1

5

5

7

U

2

2

3

6

V, Z

1

1

6

6

10

8

8

W

1

1

3

4

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

NG16

2-spool position valve – qV maxin l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring end position in the main valve1) (with ppilot min = 12 bar)

C, D, K, Y, Z

300

300

300

300

300

X external – spring end position in the main valve

C

300

300

300

300

300

D, Y

300

270

260

250

230

K

300

250

240

230

210

Z

300

260

190

180

160

X external – hydraulic end position in the main valve

HC, HD, HK, HZ, HY

300

300

300

300

300

1) If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails!

NG16

3-spool position valves – qV max in l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring-centered

E, H, J, L, M, Q, U, W, R

300

300

300

300

300

F, P

300

250

180

170

150

G, T

300

300

240

210

190

S

300

300

300

250

220

V

300

250

210

200

180

X external – pressure-centered (at minimum pilot pressure of 16 bar)

all

1)

300

300

300

300

300

1) With symbol V, the pilot control valve is not required for flows >160 l/min.

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

NG25 (type W.H 22)

Δp-qV characteristic curves

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Symbol

Spool position

Symbol

Zero position

P – A

P – B

A – T

B – T

B – A

A – T

B – T

P – T

E, D

2

2

3

5

F

2

4

J, Q, K

2

2

4

6

G, T

9

M, W

1

1

3

5

H

3

H, V, C, Z

1

1

4

6

L

7

F

1

2

4

5

U

6

G

3

4

5

6

J

8

8

R

1

2

2

P

4

6

L

2

2

4

5

V, Z

8

U

2

2

2

6

P

2

2

2

7

T

4

4

5

6

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

NG25 (type W.H 22)

2-spool position valve – qV maxin l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring end position in the main valve (with ppilot min = 11 bar / 14 bar)

C, D, K, Y, Z

450

450

450

450

450

X external – spring end position in the main valve

1)

C

450

450

320

250

200

D, Y

450

450

450

400

320

K

450

215

150

120

100

Z

350

300

290

260

160

X external – hydraulic end position in the main valve

HC, HD, HK, HZ, HY

450

450

450

450

450

HC./O…, HD./O…, HK./O…, HZ./O…

450

450

450

450

450

HC./OF…, HD./OF…, HK./OF…, HZ./OF…

450

450

450

450

450

1) If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails!

NG25 (type W.H 22)

3-spool position valves – qV max in l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring-centered

E, J, L, M, Q, U, W, R

450

450

450

450

450

H

450

450

300

260

230

G

400

350

250

200

180

F

450

270

175

130

110

V

450

300

240

220

160

T

400

300

240

200

160

P

450

270

180

170

110

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

NG25 (type W.H 25)

Δp-qV characteristic curves

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Symbol

Spool position

Zero position

P – A

P – B

A – T 1)

B – T 1)

A – T

B – T

P – T

E, Y, D

1

1

3

4

F

1

1

2

4

2

5

G, T

1

1

2

5

7

H

1

1

2

5

2

2

4

C

1

1

2

5

J

1

1

2

5

6

5

K

1

1

2

5

L

1

1

2

4

5

M

1

1

3

4

P

1

1

3

5

3

5

Q

1

1

2

3

R

1

1

3

U

1

1

2

5

5

V

1

1

2

5

8

7

Z

1

1

2

5

W

1

1

3

4

8 Symbol R, spool position B – A

7

Spool type G

Central position P – T

8

Spool type T

Central position P – T

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

NG25 (type W.H 25)

2-spool position valve – qV maxin l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring end position in the main valve (with ppilotmin = 13 bar)

C, D, K, Y, Z

700

700

700

700

650

X external – spring end position in the main valve

1)

C

700

700

700

700

650

D, Y

700

650

400

350

300

K

700

650

420

370

320

Z

700

700

650

480

400

X external – hydraulic end position in the main valve

HC, HD, HK, HZ, HY

700

700

700

700

700

HC./O…, HD./O…, HK./O…, HZ./O…

700

700

700

700

700

HC./OF…, HD./OF…, HK./OF…, HZ./OF…

700

700

700

700

700

1) If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails!

NG25 (type W.H 25)

3-spool position valves – qV max in l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring-centered

E, L, M, Q, U, W

700

700

700

700

650

G, T

400

400

400

400

400

F

650

550

430

330

300

H

700

650

550

400

360

J

700

700

650

600

520

P

650

550

430

430

300

V

650

550

400

350

310

R

700

700

700

650

580

X external – pressure-centered (at minimum pilot pressure of 18 bar)

E, F, H, J, L, M, P, Q, R, U, V, W

700

700

700

700

650

G, T

400

400

400

400

400

X external – pressure-centered (with pilot pressure > 30 bar)

G, T

700

700

700

700

650

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

Size 32

∆p-qv-characteristic curves – Symbol E, R and W

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Symbol

Spool position

P – A

P – B

A – T

B – T

B – A

E

4

4

3

2

R

4

4

3

1

W

4

4

3

2

Size 32

∆p-qv- characteristic curves – Symbol G and T

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Symbol

Spool position

P – A

P – B

A – T

B – T

P – T

G

7

8

7

5

6

T

7

8

7

5

6

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

Size 32

2-spool position valve – qV maxin l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring end position in the main valve (with ppilot min = 10 bar)

C, D, K, Y, Z

1100

1040

860

750

680

X external – spring end position in the main valve

1)

C

1100

1040

860

800

700

D, Y

1100

1040

540

480

420

K

1100

1040

860

500

450

Z

1100

1040

860

700

650

X external – hydraulic end position in the main valve

HC, HD, HK, HZ, HY

1100

1040

860

750

680

1) If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails!

Size 32

3-spool position valves – qV max in l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring-centered

E, J, L, M, Q, R, U, W

1100

1040

860

750

680

G, T, H, F, P

900

900

800

650

450

V

1100

1000

680

500

450

X external – pressure-centered (at minimum pilot pressure of 8.5 bar)

all

1100

1040

860

750

680

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

2 spool positions

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid
1) Only for NG10 and 25 ("H-WEH 22") with 3/2-way version; if operating pressure > tank pressure, port T is to be used as a leakage port!

Ordering code

Type of actuation

Symbol

Spool return

Type WH (hydraulic)

A1), C, D, K, Z

../..

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

..H../..

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

B1), Y

../..

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid
1) Only for NG10 and 25 ("4W.H 22") with 3/2-way version; if operating pressure > tank pressure, port T is to be used as aleakage port!

3 spool positions

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid
2) Example: Symbol E with actuating side “a” → ordering code ..EA..
3) Symbol S only for NG16

Ordering code

Type of actuation

Symbol

Actuating side

Spool return

Type WH (hydraulic)

E, F, G, H, J, L, M, P, Q, R, S, T, U, V, W

../..

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

..H../..

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Inductive position switch type QM Switching logics

Version QMA

(Position switch on side B, monitored spool position of the main stage "a")

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Version QMA

(Position switch on side B, monitored spool position of the main stage "a")

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Version QMB

(Position switch on side A, monitored spool position of the main stage "b")

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Version QMB

(Position switch on side A, monitored spool position of the main stage "b")

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

version QMAB

(Position switch on side A and B, monitored spool position "a" and "b")

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Version QM0

(Position switch on side A and B, monitored spool position "0")

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid
1) No signal change at the position switch on side B with spool position "a"
2) No signal change at the position switch on side A with spool position "b"

Version QM0

(Position switch on side B, monitored spool position of the main stage "0")

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Version QM0

(Position switch on side A, monitored spool position of the main stage "0")

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

NG10

Dimensions in mm

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid
technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

1

Main valve

7

Height of the diversion plate with hydraulic actuation

10.1

machined valve contact surface; porting pattern according to ISO 4401-05-05-0-05

12

Name plate complete valve

13

Seal rings

NG16

Dimensions in mm

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid
technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

1

Main valve

7

Height of the diversion plate with hydraulic actuation

10.2

machined valve contact surface; porting pattern according to ISO 4401-07-07-0-05

11

Name plate pilot control valve

12

Name plate complete valve

13

Seal rings

15

2-spool position valves with spring end position in the main valve (spool symbols A, C, D, K, Z)

16

2-spool position valves with spring end position in the main valve (spool symbols B, Y)

17

3-spool position valves, spring-centered;
2-spool position valves with hydraulic end position in the main valve

18

3-spool position valves, pressure-centered

19

Locking pin

NG25 (type W.H 22)

Dimensions in mm

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid
1) Port L only for valves with pressure-centered zero position
technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

1

Main valve

7

Height of the diversion plate with hydraulic actuation

10.3

machined valve contact surface; porting pattern according to ISO 4401-08-08-0-05

12

Name plate complete valve

13

Seal rings

19

Locking pin

NG25 (type W.H 25)

Dimensions in mm

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid
1) Port L only for valves with pressure-centered zero position
technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

1

Main valve

7

Height of the diversion plate with hydraulic actuation

10.3

machined valve contact surface; porting pattern according to ISO 4401-08-08-0-05

12

Name plate complete valve

13

Seal rings

15

2-spool position valves with spring end position in the main valve (spool symbols A, C, D, K, Z)

16

2-spool position valves with spring end position in the main valve (spool symbols B, Y)

17

3-spool position valves, spring-centered;
2-spool position valves with hydraulic end position in the main valve

18

3-spool position valve, pressure-centered

19

Locking pin

Size 32

Dimensions in mm

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid
technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

1

Main valve

7

Height of the diversion plate with hydraulic actuation

10.4

machined valve contact surface; porting pattern according to ISO 4401-10-09-0-05

12

Name plate complete valve

13

Seal rings

15

2-spool position valves with spring end position in the main valve (spool symbols A, C, D, K, Z)

16

2-spool position valves with spring end position in the main valve (spool symbols B, Y)

17

3-spool position valves, spring-centered;
2-spool position valves with hydraulic end position in the main valve

18

3-spool position valve, pressure-centered

19

Locking pin

Subplates (separate order) with porting pattern according to ISO 4401 see data sheet 45100.

 

Valve mounting screws (separate order)

 

– NG10:

4 hexagon socket head cap screws, metric

ISO 4762 - M6 x 45 - 10.9-flZn-240h-L

(Friction coefficientμtotal = 0.09 to 0.14);

Tightening torque MA = 12.5 Nm ± 10%,

material no. R913000258

 

4 hexagon socket head cap screws UNC 1/4-20 UNC x 1 3/4″ ASTM-A574

upon request

 

– NG16:

4 hexagon socket head cap screws, metric

ISO 4762 - M10 x 60 - 10.9-flZn-240h-L

(friction coefficientμtotal = 0.09 to 0.14);

Tightening torque MA = 75 Nm ± 10%,

Material no. R913000116

 

2 hexagon socket head cap screws, metric

ISO 4762 - M6 x 60 - 10.9-flZn-240h-L

(Friction coefficient μtotal = 0.09 to 0.14);

Tightening torque MA = 12,5 Nm ± 10%,

material no. R913000115

 

4 hexagon socket head cap screws UNC 3/8-16 UNC x 2 1/4″ ASTM-A574

upon request

 

2 hexagon socket head cap screws UNC 1/4-20 UNC x 1/4″ ASTM-A574

upon request

 

– NG25:

6 hexagon socket head cap screws, metric

ISO 4762 - M12 x 60 - 10.9-flZn-240h-L

(friction coefficient μtotal = 0.09 to 0.14);

Tightening torque MA = 130 Nm ± 10%,

Material no. R913000121

 

6 hexagon socket head cap screws UNC 1/2-13 UNC x 2 1/2″ ASTM-A574

upon request

 

– NG32:

6 hexagon socket head cap screws, metric

ISO 4762 - M20 x 80 - 10.9-flZn-240h-L

(friction coefficient μtotal = 0.09 to 0.14);

Tightening torque MA = 430 Nm ± 10%,

Material no. R901035246

 

6 hexagon socket head cap screws UNC 3/4-10 UNC x 3 1/4″ ASTM-A574

upon request

Stroke setting, mounting options

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

The stroke of the control spool is limited by the stroke setting (1). The control spool stroke is shortened by loosening the lock nut (2) and clockwise rotation of the adjustment spindle (3). The control chamber (4) must be depressurized for this.

NG

L4

mm

10 6.5
16 10
25 (WH 22) 9.5
25 (WH 25) 12.5
32 15

5 adjustment range

– NG10:

1 rotation = 1 mm adjustment travel

– NG16 to 32:

1 rotation = 1.5 mm adjustment travel

Stroke setting, mounting options

Stroke limitation on side A

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Stroke setting, mounting options

Stroke limitation on side B

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

Mounting options

Ordering code

NG

3-spool position valve

1)

Spring-centered

Pressure-centered

L1 (mm)

L2 (mm)

L3 (mm)

L1 (mm)

L2 (mm)

L3 (mm)

Stroke setting on valve side A and B

10

10

90

144

234

16

100

200

300

25 2)

96

241

337

25 3)

123

276

399

32

133

344

477

Stroke setting on valve side A

11

10

90

106

196

16

100

156

256

25 2)

96

193

289

25 3)

123

225

348

32

133

287

420

Stroke setting on valve side B

12

10

52

144

196

16

56

200

256

81

200

281

25 2)

48

241

289

25 3)

72

276

348

107

276

283

32

76

344

420

120

344

464

1) With symbol A only version "11", with symbol B only version "12" possible.

2-spool position valve

Spring end position

Hydraulic end position

A, C, D, K, Z

B, Y

HC, HD, HK, HZ, HY

Mounting options

Ordering code

NG

L1 (mm)

L2 (mm)

L3 (mm)

L1 (mm)

L2 (mm)

L3 (mm)

L1 (mm)

L2 (mm)

L3 (mm)

Stroke setting on valve side A and B

10

10

90

144

234

90

144

234

90

144

234

16

100

200

300

25 1)

96

241

337

96

241

337

96

241

337

25 2)

123

276

399

32

133

344

477

Stroke setting on valve side A

11

10

90

106

196

90

106

196

16

100

180

280

100

156

256

25 1)

96

193

289

96

193

289

96

193

289

25 2)

123

253

376

123

225

348

32

133

316

449

133

287

420

Stroke setting on valve side B

12

10

52

144

196

52

144

196

52

144

196

16

80

200

280

56

200

256

25 1)

48

241

289

48

241

289

48

241

289

25 2)

100

276

376

72

276

348

32

105

344

449

76

344

420

1) Version "W.H 22"
2) Version "W.H 25"

Spool position monitoring

Inductive position switch type QM

Dimensions in mm

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid
1) Without mating connector

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Switching time adjustment

Type 4WEH 10 ..4X/…S

Type 4WEH 10 ..4X/…S2 technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

The switching time of the main valve (1) is influenced by using a twin throttle check valve (2) (type Z2FS 6; data sheet 27506).

 

Modification of supply (3) to discharge control (4):

Remove the pilot control valve (5) – The plate (6) to accept the seal rings stays in place – Turn the switching time adjustment (2) around its longitudinal axis and put it back, install the pilot control valve (5).

Notice:

The modification may only be performed by authorized specialists or at the factory!

"D3” pressure reducing valve

Type 4WEH 10 ..4X/…/..D3

technical illustration-R978914195-Size 22, symbol H, electrical with solenoid

The pressure reducing valve (8) has to be used at a pilot pressure above 250 bar (with type 4WEH 22 …: 210 bar) and with version “H”.

The secondary pressure is kept at a constant level of 45 bar.

 

Notice:

If a pressure reducing valve "D3" (8) is used, a "B10" throttle insert has to be installed in channel P of the pilot control valve. The modification may only be performed by authorized specialists or at the factory!

The stipulations of the Machinery Directive 2006/42/EC are to be adhered to! Please also note data sheet 08012 with information on MTTFd values and shock and vibration loads!