DIRECTIONAL SPOOL VALVES, PILOT OPERATED, WITH ELECTRO-HYDRAULIC ACTUATION

WEH

Material #: R900928985

Model : 4WEH16G7X/6EG24N9K4/B08P4,5

Types of actuation (internal or external pilot control): Electro-hydraulic (type WEH) For subplate mounting Porting pattern according toISO 4401 4/3-, 4/2- or 3/2-way version Spring or pressure centering, spring end position or hydraulic end position Wet-pin DC or AC solenoids, optional Electrical connection as individual or central connection Optional versions:
- Manual override
- Switching time adjustment
- Preload valve in channel P of the main valve
- Stroke setting and/or spool position monitoring

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

Types of actuation (internal or external pilot control): Electro-hydraulic (type WEH) For subplate mounting Porting pattern according toISO 4401 4/3-, 4/2- or 3/2-way version Spring or pressure centering, spring end position or hydraulic end position Wet-pin DC or AC solenoids, optional Electrical connection as individual or central connection Optional versions:
- Manual override
- Switching time adjustment
- Preload valve in channel P of the main valve
- Stroke setting and/or spool position monitoring

Directional valves type WEH…

The valve type WEH is a directional spool valve with electro-hydraulic actuation. It controls the start, stop and direction of a flow. The directional valve basically consists of the main valve with housing (1), the main control spool (2), one or two return springs (3.1) and (3.2), as well as the pilot control valve (4) with one or two solenoids "a" (5.1) and/or "b" (5.2). The main control spool (2) in the main valve is held in the zero or initial position by the springs or by means of pressurization. In the initial position, the two spring chambers (6) and (8) are connected with the tank in a depressurized form via the pilot control valve (4). Via the control line (7), the pilot control valve is supplied with pilot oil. Supply can be implemented internally or externally (externally via port X). Upon actuation of the pilot control valve, e.g. solenoid "a", the pilot control spool (10) is moved to the left and thus, the spring chamber (8) is pressurized with pilot pressure. The spring chamber (6) remains depressurized. The pilot pressure acts on the left side of the main control spool (2) and moves it against the spring (3.1). This connects port P with B and A with T in the main valve. On switching off of solenoid, the pilot control spool (10) returns to its initial position (except impulse spool). The spring chamber (8) is unloaded to the tank. The pilot oil return is implemented internally (via channel T) or externally (via channel Y). An optional manual override (9) allows for moving of the pilot control spool (10) without solenoid energization.

Notices:

The return springs (3.1) and (3.2) in the spring chambers (6) and (8) hold the main control spool (2) in central position without pilot pressure even with, for example, vertical valve positioning.

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

4/3 directional valve with pressure centering of the main control spool, type WEH…H

The main control spool (2) in the main valve is kept in the zero position by pressurization of the two front faces. One centering bush (12) rests on the housing and fixes the control spool position. By pressure relief of one front face, the main control spool (2) is moved to the switching position. The unloaded control spool face displaces the returning pilot oil into channel Y (external) via the pilot control valve.

Notes:

The springs (3.1) and (3.2) do not have a return function in this version. They hold the main control spool (2) in central position in the depressurized condition and with horizontal installation.

Pilot oil supply (schematic illustration)

NG10

Pilot oil supply (schematic illustration)

NG16

Pilot oil supply (schematic illustration)

NG25 („W.H 22“)

Pilot oil supply (schematic illustration)

NG25 („W.H 25“)

Pilot oil supply (schematic illustration)

Size 32

Pilot oil supply

Pilot oil return

External

2

closed

External

1

closed

Internal

2

open

Internal

1

open

1

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

2

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

3

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

Type WEH...

The pilot oil supply is implemented externally - via channel X - from a separate pressure supply.

The pilot oil return is implemented externally - via the Y channel - into the tank.

Type WEH…E…

The pilot oil supply is implemented internally from channel P of the main valve. (see Technical data)

The pilot oil return is implemented externally - via channel Y - into the tank. In the subplate, port X is closed.

Type WEH...ET...

The pilot oil supply is implemented internally from channel P of the main valve.

The pilot oil return is implemented internally via the channel T - into the tank. In the subplate, ports X and Y are closed.

Type WEH...T...

The pilot oil supply is implemented externally - via channel X - from a separate pressure supply.

The pilot oil return is implemented internally - via the channel T - into the tank. In the subplate, port Y is closed.

Throttle insert

Use of the throttle insert (5) is necessary if the pilot oil supply in channel P of the pilot control valve is to be limited (see below). The throttle insert (5) is inserted in channel P of the pilot control valve.

Notices:

The modification of the pilot oil supply may only be performed by authorized specialists or at the factory!

Pilot oil supply X or return Y external: The maximum admissible operating parameters of the pilot control valve must be observed (see data sheet 23178)! Maximum pilot pressure: please observe the Technical data! Pilot oil supply internal (version "ET" and "E"): Minimum pilot pressure: please observe the Technical data! In order to prevent inadmissibly high pressure peaks, a "B10" throttleinsert has to be provided in port P of the pilot control valve. In connection with version "H", the pressure reducing valve "D3" (see switching time adjustment) is also required.

3

Pilot control valve

4

Main valve

5

Throttle insert

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

16

17

18

19

20

21

22

WEH

/

K4

/

*

01

up to 280 bar

no code

02

3-way version

3

4-way version

4

Types of actuation

03

electro-hydraulic

WEH

Size

04

NG10

10

NG16

16

NG25 (version "WEH 22")

22

NG25 (version "WEH 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 ("WEH 25") and NG32

6X

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

7X

Control spool return in the pilot control valve with 2 spool positions and 2 solenoids (only possible with symbols C, D, K, Z and hydraulic control spool return in the main valve)

08

With spring return

no code

Without spring return

O

Without spring return with detent

2)

OF

Pilot control valve

2)

09

High-power valve

6E

10

Direct voltage 24 V

2)

G24

Alternating voltage 230 V, 50/60 Hz

2)

W230

For other voltages, frequencies and electric data, see data sheet of high-power valve

11

Without manual override

no code

With manual override

N

With concealed manual override

N9

Pilot oil flow

12

External pilot oil supply, external pilot oil return

3)

no code

Internal pilot oil supply, external pilot oil return

3; 4)

E

Pilot oil supply internal, pilot oil return internal

4)

ET

External pilot oil supply, internal pilot oil return

3)

T

version “ET” and “T” with 3-spool position valve, pressure-centered, only possible if ppilot ≥ 2 x ptank + ppilot min!)

Switching time adjustment

13

without switching time adjustment

no code

Switching time adjustment as supply control

S

Switching time adjustment as discharge control

S2

Corrosion resistance

14

None (valve housing primed)

no code

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

J3

Electrical connection

2)

15

Individual connection

Without mating connector; connector DIN EN 175301-803

K4 6)

For further electrical connections, see data sheet 23178 and 08010

Spool position monitoring

16

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

17

For ordering code, see stroke setting

Throttle insert

2)

18

Without throttle insert

no code

Throttle Ø 0.8 mm

B08

Throttle Ø 1.0 mm

B10

Throttle Ø 1.2 mm

B12

Throttle Ø 1.5 mm

B15

Throttle Ø 2.0 mm

B20

Throttle Ø 2.5 mm

B25

preload valve (not for NG10)

2)

19

without preload valve

no code

with preload valve (pö = 4.5 bar)

P4,5

20

without pressure reducing valve

no code

with pressure reducing valve

D3 5)

Seal material

21

NBR seals

no code

FKM seals

V

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

22

Further details in the plain text

*

pSt

Pilot pressure

ppilot min

Pilot pressure, minimum

ptank

Tank pressure

Cracking pressure

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) Only with electro-hydraulic actuation (type WEH)
3) Pilot oil supply X or return Y external:
- The maximum admissible operating parameters of the pilot control valve must be observed (see data sheet 23178)!
- Minimum pilot pressure: please see technical data!
- Maximum pilot pressure: please see technical data!
4) Pilot oil supply internal (version "ET" and "E"):
- Minimum pilot pressure: please see technical data!
- Maximum pilot pressure: please see technical data!
With a higher pilot pressure, use of a pressure reducing valve "D3" is required (if it is not used pilot pressure = operating pressure at the port!).
- In order to prevent inadmissibly high pressure peaks, a "B10" throttle insert has to be provided in port P of the pilot control valve (see Pilot oil supply).
- In connection with version "H", the pressure reducing valve "D3" is also required.
5) Only in connection with the "B10" throttle insert
6) Mating connectors, separate order, see data sheet 23178

general

Size

10 16 25 (WEH22) 25 (WEH25) 32

Weight (approx.)

Valve with one solenoid

kg

6.4 8.5 11.5 17.6

Valve with two solenoids, spring-centered

kg

6.8 8.9 11.9 19 41

Valve with two solenoids, pressure-centered

kg

6.8 8.9 11.9 19 41

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

100

hydraulic

Size

10 16 25 (WEH22) 25 (WEH25) 32

Maximum operating pressure

Port P

bar

280

Anschluss A

bar

280

Port B

bar

280

Port T

External pilot oil return Y

bar

280 250

Internal pilot oil return Y (with direct voltage) 1)

bar

210

Internal pilot oil return Y (with alternating voltage) 1)

bar

160

Port Y

Pilot oil return, external (with direct voltage)

bar

210

Pilot oil return, external (with alternating voltage)

bar

160

Hydraulic fluid

see table

Hydraulic fluid temperature range

NBR seals 2)

°C

-20 … +80

FKM seals 2)

°C

-15 … +80

HFC hydraulic fluid

°C

-20 … +50

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 pilot pressure 4)

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)

3-spool position valve, spring-centered

bar

12 14 10.5 13 8.5

3-spool position valve, pressure-centered

bar

- 14 - 18 8.5

2-spool position valve, spring end position

bar

10 14 11 13 10

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) 6)

bar

7.5 5) 4.5 7)

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

- 2.9 - 7 15.1

from zero position in switching position “b”

cm³

- 5.72 - 14.15 29.4

from switching position “b” in zero position

cm³

- 2.83 - 5.73 14.4

Pilot flow for shortest switching time, approx.

l/min

35 45
1) As a 3-spool position valve, pressure-centered only possible if ppilot ≥ 2 x ptank + ppilot min
2) If type WH is used in potentially explosion-proof areas, see data sheet 07011.
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.
4) Internal pilot oil supply:- With a higher pilot pressure, use of a pressure reducing valve "D3" is required (if it is not used pilot pressure = operating pressure at the port).- In connection with version "H", the pressure reducing valve "D3" is also required.
5) For symbols C, F, G, H, P, T, V, Z, an internal pilot oil supply is only possible if the flow from P to T in the central position (for 3-spool position valve) or while crossing the central position (for2-spool position valve) is so large that the pressure differential of P to T reaches a value of at least 7,5 bar and the pilot oilreturn Y is implemented externally.
6) Symbol S only for NG16
7) For symbols C, F, G, J, H, P, T, V, Z, S 5) – by means of preload valve (not NG10) or correspondingly high flow. (Determination ofthe required flow, see "Preload valve" characteristic curves.) For NG10, a check valve with a cracking pressure of 7,5 bar is to be provided in the return line to the tank.The pilot oil return Y must be implemented externally.

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

Size

10 16 25 (WEH22) 25 (WEH25) 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. Flame-resistant – containing water: Maximum pressure differential per control edge 50 bar Pressure pre-loading at the tank port >20% of the pressure differential, otherwise increased cavitation erosion Life cycle as compared to operation with mineral oil HL, HLP 30 ... 100% 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).

Switching times

Pilot pressure

bar

70

210

250

Spring

ON

OFF

NG10

Without throttle insert

ms

40 ... 60

40 ... 60

20 ... 30

With throttle insert

ms

60 ... 90

50 ... 70

20 ... 30

NG16

Without throttle insert

ms

50 ... 80

40 ... 60

50 ... 80

With throttle insert

ms

110 ... 130

80 ... 100

50 ... 80

NG25 (WEH 22)

Without throttle insert

ms

40 ... 70

40 ... 60

50 ... 70

With throttle insert

ms

140 ... 160

80 ... 110

50 ... 70

NG25 (WEH 25)

Without throttle insert

ms

70 ... 100

50 ... 70

100 ... 130

With throttle insert

ms

200 ... 250

120 ... 150

100 ... 130

NG32

Without throttle insert

ms

80 ... 130

70 ... 100

140 ... 160

With throttle insert

ms

420 ... 560

230 ... 350

140 ... 160

Notices!

Switching times = Contacting at the pilot control valve until start of opening of the control edge in the main valve and change in the control spool stroke by 95%) The switching times are measured according to ISO 6403 with HLP46, ϑOil = 40 °C ±5 °C). With different oil temperatures, variations are possible! The switching times were determined using DC solenoids. They decrease by approx. 20 ms if AC solenoids are used. The shut-off of the solenoids creates voltage peaks, which can be reduced by the use of suitable diodes. The switching times increase by approx. 30 ms if the pressure reducing valve "D3" is used. The switching times have been determined under ideal conditions and may differ in the system, depending on the application conditions.

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

PNP transistor outputs, load between switching outputs and GND

Pinout

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

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

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

4

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

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

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

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)

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

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

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

Performance limits: important information

Notice (applies to all sizes):

The specified switching power limits apply to the use with two directions of flow (e. g. from P to A and simultaneous return flow from B to T at a ratio of 1:1). Due to the flow forces acting within the valves, the admissible switching power limit may be considerably lower with only one direction of flow (e. g. from P to A while port B is blocked, with flow in the same or in different directions)! In such cases of application, please consult us!

The switching power limit was established while the solenoids were at operating temperature, at 10% undervoltage, and without tank preloading.

NG16

With pilot oil supply X internal, a preload valve has to be used for flows < 160 l/min due to the negative overlap of the symbols C, Z and HC, HZ. 4/3 directional valves with pressure centering of the control spool in the main valve can be used above the indicated performance limit. In this case, a higher pilot pressure is required (values see performance limits of the corresponding size). With pilot oil supply X internal, sufficient flow needs to be ensured due to the negative overlap of symbols F, G, H, P, S and T (for determination of the required flow, see "Preload valve" characteristic curves. If the required flow is not reached, a preload valve has to be used (see technical data).

NG25 („WEH 22“)

With pilot oil supply X internal a preload valve has to be used for flows < 180 l/min due to the negative overlap of spools Z, HZ and V. With pilot oil supply X internal sufficient flow needs to be ensured due to the negative overlap of symbols C, HC, F, G, H, P and T (for determination of the required flow, see “Preload valve” characteristic curves. If the required flow is not reached, a preload valve has to be used (see technical data).

NG25 („WEH 25“)

With pilot oil supply X internal, a preload valve has to be used for flows < 180 l/min due to the negative overlap of symbols Z, HZ and V. 4/3 directional valves with pressure centering of the control spool in the main valve can be used above the indicated performance limit. In this case, a higher pilot pressure is required (values see performance limits of the corresponding size). With pilot oil supply X internal, sufficient flow needs to be ensured due to the negative overlap of symbols C, HC, F, G, H, P and T (for determination of the required flow, see "Preload valve"characteristic curves. If the required flow is not reached, a preload valve has to be used (see technical data).

NG32

With pilot oil supply X internal, a preload valve has to be used for flows < 180 l/min due to the negative overlap of symbols Z, HZ and V. 4/3 directional valves with pressure centering of the control spool in the main valve can be used above the indicated performance limit. In this case, a higher pilot pressure is required (values see performance limits of the corresponding size). With pilot oil supply X internal, sufficient flow needs to be ensured due to the negative overlap of symbols C, HC, F, G, H, P and T (for determination of the required flow, see "Preload valve" characteristic curves. If the required flow is not reached, a preload valve has to be used (see technical data).

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

2

3

U

2

2

3

6

6

A, B

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.

2 spool positions

1) Only for NG10 and 25 ("WEH 22") with 3/2-way version; if operating pressure > tank pressure, port T is to be used as aleakage port!

Ordering code

Type of actuation

Symbol

Spool return

Type WEH (electro-hydraulic)

A 1), C, D, K, Z

../..

..H../..

..H../O

..H../OF

B 1),Y

../..

..H../..

1) Only for NG10 and 25 ("WEH 22") with 3/2-way version; if operating pressure > tank pressure, port T is to be used as aleakage port!

3 spool positions

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 WEH (electro-hydraulic)

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

../..

.A

.B

..H../..

H.A

H.B

Symbols for valves with 2 spool positions

Symbols for valves with 3 spool positions

Notice:

3-spool position valves, pressure-centered, preferably with external pilot oil supply and/or return ("no code", "E") For preconditions for internal pilot oil supply and/or return ("ET", "T"), see Symbols and Technical data

Inductive position switch type QM Switching logics

Version QMA

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

Version QMA

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

Version QMB

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

Version QMB

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

version QMAB

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

Version QM0

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

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")

Version QM0

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

NG10

Dimensions in mm

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

1

Main valve

2

Pilot control valve type 4WE 6... according to data sheet 23208:

2.1

Pilot control valve type 4WE 6 D… (1 solenoid) for main valves with symbols C, D, K, Z Symbols HC, HD, HK, HZ

Pilot control valve type 4WE 6 JA... (1 solenoid “a”) for main valves with symbols EA, FA, etc., spring return

Pilot control valve type 4WE 6 MA... (1 solenoid “a”) for main valves with symbols HEA, HFA, etc., hydraulic control spool return

2.2

Pilot control valve type 4WE 6 Y... (1 solenoid) for main valves with symbol Y symbol HY

Pilot control valve type 4WE 6 JB... (1 solenoid “b”) for main valves with symbol EB, FB, etc., spring return

Pilot control valve type 4WE 6 MB... (1 solenoid “b”) for main valves with symbol HEB, HFB, etc., hydraulic control spool return

2.3

Pilot control valve type 4WE 6J… (2 solenoids) for main valves with 3 spool positions, spring-centered

Pilot control valve type 4WE 6 M… (2 solenoids) for main valves with 3 spool positions, pressure-centered

3.1

Solenoid “a”

3.2

Solenoid “b”

4

Manual override, “N”, optional

Actuation of the manual override is only possible up to a tank pressure of approx. 50 bar. Avoid damage to the bore of the manual override! (Special tool for actuation, separate order, material no.  R900024943). When the manual override is blocked, the operation of the solenoid must be prevented!

The simultaneous actuation of the solenoids must be prevented!

5

Solenoid without manual override

6

Solenoid with manual override

8

Switching time adjustment (wrench size 6), optional

9

Pressure reducing valve, optional

10.1

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

11

Name plate pilot control valve

12

Name plate complete valve

13

Seal rings

14

Space required to remove the mating connector

NG16

Dimensions in mm

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

1

Main valve

2

Pilot control valve type 4WE 6... according to data sheet 23208:

2.1

Pilot control valve type 4WE 6 D… (1 solenoid) for main valves with symbols C, D, K, Z Symbols HC, HD, HK, HZ

Pilot control valve type 4WE 6 JA... (1 solenoid “a”) for main valves with symbols EA, FA, etc., spring return

Pilot control valve type 4WE 6 MA... (1 solenoid “a”) for main valves with symbols HEA, HFA, etc., hydraulic control spool return

2.2

Pilot control valve type 4WE 6 Y... (1 solenoid) for main valves with symbol Y symbol HY

Pilot control valve type 4WE 6 JB... (1 solenoid “b”) for main valves with symbol EB, FB, etc., spring return

Pilot control valve type 4WE 6 MB... (1 solenoid “b”) for main valves with symbol HEB, HFB, etc., hydraulic control spool return

2.3

Pilot control valve type 4WE 6J… (2 solenoids) for main valves with 3 spool positions, spring-centered

Pilot control valve type 4WE 6 M… (2 solenoids) for main valves with 3 spool positions, pressure-centered

3.1

Solenoid “a”

3.2

Solenoid “b”

4

Manual override, “N”, optional

Actuation of the manual override is only possible up to a tank pressure of approx. 50 bar. Avoid damage to the bore of the manual override! (Special tool for actuation, separate order, material no.  R900024943). When the manual override is blocked, the operation of the solenoid must be prevented!

The simultaneous actuation of the solenoids must be prevented!

5

Solenoid without manual override

6

Solenoid with manual override

8

Switching time adjustment (wrench size 6), optional

9

Pressure reducing valve, optional

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

14

Space required to remove the mating connector

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

1) Port L only for valves with pressure-centered zero position

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

1

Main valve

2

Pilot control valve type 4WE 6... according to data sheet 23208:

2.1

Pilot control valve type 4WE 6 D… (1 solenoid) for main valves with symbols C, D, K, Z Symbols HC, HD, HK, HZ

Pilot control valve type 4WE 6 JA... (1 solenoid “a”) for main valves with symbols EA, FA, etc., spring return

Pilot control valve type 4WE 6 MA... (1 solenoid “a”) for main valves with symbols HEA, HFA, etc., hydraulic control spool return

2.2

Pilot control valve type 4WE 6 Y... (1 solenoid) for main valves with symbol Y symbol HY

Pilot control valve type 4WE 6 JB... (1 solenoid “b”) for main valves with symbol EB, FB, etc., spring return

Pilot control valve type 4WE 6 MB... (1 solenoid “b”) for main valves with symbol HEB, HFB, etc., hydraulic control spool return

2.3

Pilot control valve type 4WE 6J… (2 solenoids) for main valves with 3 spool positions, spring-centered

Pilot control valve type 4WE 6 M… (2 solenoids) for main valves with 3 spool positions, pressure-centered

3.1

Solenoid “a”

3.2

Solenoid “b”

4

Manual override, “N”, optional

Actuation of the manual override is only possible up to a tank pressure of approx. 50 bar. Avoid damage to the bore of the manual override! (Special tool for actuation, separate order, material no.  R900024943). When the manual override is blocked, the operation of the solenoid must be prevented!

The simultaneous actuation of the solenoids must be prevented!

5

Solenoid without manual override

6

Solenoid with manual override

8

Switching time adjustment (wrench size 6), optional

9

Pressure reducing valve, optional

10.3

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

11

Name plate pilot control valve

12

Name plate complete valve

13

Seal rings

14

Space required to remove the mating connector

19

Locking pin

NG25 (type W.H 25)

Dimensions in mm

1) Port L only for valves with pressure-centered zero position

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

1

Main valve

2

Pilot control valve type 4WE 6... according to data sheet 23208:

2.1

Pilot control valve type 4WE 6 D… (1 solenoid) for main valves with symbols C, D, K, Z Symbols HC, HD, HK, HZ

Pilot control valve type 4WE 6 JA... (1 solenoid “a”) for main valves with symbols EA, FA, etc., spring return

Pilot control valve type 4WE 6 MA... (1 solenoid “a”) for main valves with symbols HEA, HFA, etc., hydraulic control spool return

2.2

Pilot control valve type 4WE 6 Y... (1 solenoid) for main valves with symbol Y symbol HY

Pilot control valve type 4WE 6 JB... (1 solenoid “b”) for main valves with symbol EB, FB, etc., spring return

Pilot control valve type 4WE 6 MB... (1 solenoid “b”) for main valves with symbol HEB, HFB, etc., hydraulic control spool return

2.3

Pilot control valve type 4WE 6J… (2 solenoids) for main valves with 3 spool positions, spring-centered

Pilot control valve type 4WE 6 M… (2 solenoids) for main valves with 3 spool positions, pressure-centered

3.1

Solenoid “a”

3.2

Solenoid “b”

4

Manual override, “N”, optional

Actuation of the manual override is only possible up to a tank pressure of approx. 50 bar. Avoid damage to the bore of the manual override! (Special tool for actuation, separate order, material no.  R900024943). When the manual override is blocked, the operation of the solenoid must be prevented!

The simultaneous actuation of the solenoids must be prevented!

5

Solenoid without manual override

6

Solenoid with manual override

8

Switching time adjustment (wrench size 6), optional

9

Pressure reducing valve, optional

10.3

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

11

Name plate pilot control valve

12

Name plate complete valve

13

Seal rings

14

Space required to remove the mating connector

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

Required surface quality of the valve contact surface

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

1

Main valve

2

Pilot control valve type 4WE 6... according to data sheet 23208:

2.1

Pilot control valve type 4WE 6 D… (1 solenoid) for main valves with symbols C, D, K, Z Symbols HC, HD, HK, HZ

Pilot control valve type 4WE 6 JA... (1 solenoid “a”) for main valves with symbols EA, FA, etc., spring return

Pilot control valve type 4WE 6 MA... (1 solenoid “a”) for main valves with symbols HEA, HFA, etc., hydraulic control spool return

2.2

Pilot control valve type 4WE 6 Y... (1 solenoid) for main valves with symbol Y symbol HY

Pilot control valve type 4WE 6 JB... (1 solenoid “b”) for main valves with symbol EB, FB, etc., spring return

Pilot control valve type 4WE 6 MB... (1 solenoid “b”) for main valves with symbol HEB, HFB, etc., hydraulic control spool return

2.3

Pilot control valve type 4WE 6J… (2 solenoids) for main valves with 3 spool positions, spring-centered

Pilot control valve type 4WE 6 M… (2 solenoids) for main valves with 3 spool positions, pressure-centered

3.1

Solenoid “a”

3.2

Solenoid “b”

4

Manual override, “N”, optional

Actuation of the manual override is only possible up to a tank pressure of approx. 50 bar. Avoid damage to the bore of the manual override! (Special tool for actuation, separate order, material no.  R900024943). When the manual override is blocked, the operation of the solenoid must be prevented!

The simultaneous actuation of the solenoids must be prevented!

5

Solenoid without manual override

6

Solenoid with manual override

8

Switching time adjustment (wrench size 6), optional

9

Pressure reducing valve, optional

10.4

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

11

Name plate pilot control valve

12

Name plate complete valve

13

Seal rings

14

Space required to remove the mating connector

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

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 (WEH22) 9.5
25 (WEH25) 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

Stroke setting, mounting options

Stroke limitation on side B

Mounting options

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

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

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

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) Version "W.H 22"
3) Version "W.H 25"
1) With spool symbol A only version “11”, with spool symbol B only version “12” possible.
2) Type WEH 22...
3) Type WEH 25...

Mounting options

NG

2-spool position valve

Spring end position

Hydraulic end position

A, C, D, K, Z

B, Y

HC, HD, HK, HZ, HY

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

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

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

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"
1) With spool symbol A only version “11”, with spool symbol B only version “12” possible.
2) Type WEH 22...
3) Type WEH 25...

Spool position monitoring

Inductive position switch type QM

Dimensions in mm

1) Without mating connector

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Mounting options – 2-spool position valve

Monitored spool position

Ordering code

NG

Hydraulic end position

HC, HD, HK, HZ, HY

Spring end position

C, D, K, Z

Spring end position

Y

L1 (mm) 1)

L2 (mm) 1)

L3 (mm)

L4 (mm)

L1 (mm) 1)

L2 (mm) 1)

L3 (mm)

L4 (mm)

L1 (mm) 1)

L2 (mm) 1)

L3 (mm)

L4 (mm)

„a“

Position switch on side B

QMAG24

10

211

57

211

57

211

57

16

259

55

259

55

25 2)

294

47

294

47

294

47

25 3)

325

72

325

72

32

371

76

371

76

„b“

Position switch on side A

QMBG24

10

157

111

157

111

157

111

16

159

155

159

155

25 2)

149

192

149

192

149

192

25 3)

172

225

172

225

32

161

287

161

287

"a" and "b"

Position switch on side A and B

QMABG24

10

157

211

157

211

157

211

16

159

259

25 2)

149

294

149

294

149

294

25 3)

172

325

32

161

371

1) Without mating connector
2) Type 4W.H 22..
3) Type 4W.H 25..

Mounting options – 3-spool position valve

Monitored spool position

Ordering code

NG

Spring-centered

Pressure-centered

L1 (mm) 1)

L2 (mm) 1)

L3 (mm)

L4 (mm)

L1 (mm) 1)

L2 (mm) 1)

L3 (mm)

L4 (mm)

„a“

Position switch on side B

QMAG24

10

211

57

16

259

55

259

81

25 2)

294

47

25 3)

325

72

325

107

32

371

76

371

120

„b“

Position switch on side A

QMBG24

10

157

111

16

159

155

25 2)

149

192

25 3)

172

225

32

161

287

"a" and "b"

Position switch on side A and B

QMABG24

10

157

211

16

159

259

25 2)

149

294

25 3)

172

325

32

161

371

Zero position

Position switch on side A and B

2 position switches

QM0G24

4)

10

157

211

16

159

259

25 2)

149

294

25 3)

172

325

32

161

371

1) Without mating connector
2) Version "W.H 22"
3) Version "W.H 25"
4) 3-spool position valve
1) Without mating connector
2) Type 4W.H 22
3) Type 4W.H 25
4) 3-spool position valve

Mounting options – 3-spool position valve with one solenoid

Monitored spool position

Ordering code

NG

Side A (EA, FA…)

Spring-centered

Solenoids on side B (EB, FB…)

Spring-centered

Side A (EA, FA…)

Pressure-centered

L1 (mm) 1)

L2 (mm) 1)

L3 (mm)

L4 (mm)

L1 (mm) 1)

L2 (mm) 1)

L3 (mm)

L4 (mm)

L1 (mm) 1)

L2 (mm) 1)

L3 (mm)

L4 (mm)

„a“

Position switch on side B

QMAG24

10

211

57

16

259

55

259

81

25 2)

294

47

25 3)

325

72

325

107

32

371

371

120

„b“

Position switch on side A

QMBG24

10

157

111

16

159

155

25 2)

149

192

25 3)

172

225

32

161

287

Zero position

Position switch on side A or B

1 position switches

QM0G24

​4)

10

211

57

157

111

16

259

55

159

155

259

81

25 2)

294

47

149

192

25 3)

325

72

172

225

325

107

32

371

76

161

287

371

120

1) Without mating connector
2) Type 4W.H 22..
3) Type 4W.H 25..
4) 2-spool position valve

Mounting options – 2-spool position valve

Monitored spool position

Ordering code

Size

Hydraulic end position HC, HD, HK, HZ, HY

L2 1)

L3

mm

mm

“a” position switch on side B QMAG24 25 294 47
1) Without mating connector

Mounting options – 2-spool position valve

Monitored spool position

Ordering code

Size

Spring end position C, D, K, Z

L2 1)

L3

mm

mm

“a” position switch on side B QMAG24 25 294 47
1) Without mating connector

Mounting options – 2-spool position valve

Monitored spool position

Ordering code

Size

Spring end position Y

L2 1)

L3

mm

mm

“a” position switch on side B QMAG24 25 294 47
1) Without mating connector

Mounting options – 2-spool position valve

Monitored spool position

Ordering code

Size

Hydraulic end position HC, HD, HK, HZ, HY

L1 1)

L3

mm

mm

“b” position switch on side A QMBG24 25 149 192
1) Without mating connector

Mounting options – 2-spool position valve

Monitored spool position

Ordering code

Size

Spring end position C, D, K, Z

L1 1)

L4

mm

mm

“b” position switch on side A QMBG24 25 149 192
1) Without mating connector

Mounting options – 2-spool position valve

Monitored spool position

Ordering code

Size

Spring end position Y

L1 1)

L4

mm

mm

“b” position switch on side A QMBG24 25 149 192
1) Without mating connector

Switching time adjustment

Type 4WEH 10 ..4X/…S

Type 4WEH 10 ..4X/…S2

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

The pressure reducing valve (8) has to be used at a pilot pressure above 250 bar (with type WEH 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!

Preload valve (not for NG10)

In case of valves with depressurized circulation and internal pilot oil supply, the installation of the preload valve (9) in channel P of the main valve is required in order to build up the minimum pilot pressure.

The pressure differential of the preload valve is to be added to the pressure differential of the main valve (see characteristic curves) to result in one total value.

The cracking pressure is approx. 4.5 bar.

Notice:

Series-production status, see ordering key on the name plate.

9.1

Preload valve NG16

9.2

Preload valve NG25 and NG32

10

Main valve

11

Subplate

Size

Material number P4,5

Item 9.2

Item 9.1

16

R961009417 (up to component series 71)

R961009415 (from component series 72)

25 („W.H 22“)

R961009609 (up to component series 76)

-

25 („W.H 25“)

R961009416 (up to component series 67)

R961009166 (from component series 68)

32

R961009610 (up to component series 63)

-

Δp–qVcharacteristic curve (measured with HLP46, ϑOil = 40 °C ± 5 °C)

1

NG16

2

NG25 (type 4W.H 25 …)

3

NG25 (type 4W.H 22 …)

4

NG32

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!