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Артикул: RX7412

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Directional spool valves, pilot operated, with electro-hydraulic actuation H-WEH...=UR

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Description

  • Solenoid coil is an approved component with UR-marking according to UL 906
  • Size 10, 16, 25 (H-WEH22), 25 (H-WEH25), 32
  • Component series 4X, 7X, 7X, 6X, 6X
  • Maximum operating pressure 350 bar
  • Maximum flow 1100 l/min

Features

  • Concealed manual override
  • For subplate mounting
  • Porting pattern according to ISO 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 connection
  • Optional versions:
    - Switching time adjustment
    - Preload valve in channel P of the main valve
    - Stroke setting and/or spool position monitoring

Product description

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 H-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.

Notices:

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)

Size 10

NG16

NG25 („W.H 22“)

NG25 („W.H 25“)

Size 32

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

Pilot oil supply

Pilot oil return

External

2, 3

closed

External

1

closed

Internal

2, 3

open

Internal

1

open

Type H-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 H-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 - in the tank. In the subplate, port X is closed.

Type H-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 H-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. 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 23208)!
    • 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.

4

Pilot control valve

5

Main valve

6

Throttle insert

Type code

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

16

17

18

19

20

21

22

H -

WEH

/

6E

N9

K4

/

= UR

*

01

Up to 350 bar

H -

02

3-way version

3

4-way version

4

Types of actuation

03

Electro-hydraulic

WEH

Size

04

NG10

10

NG16

16

NG25 (version "H-WEH 22")

22

NG25 (version "H-WEH 25")

25

Size 32

32

Control 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 ("W.H 25") and NG32

6X

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

7X

Control spool return in the pilot control valve with 2 switching positions and 2 solenoids (Only possible with symbols A, B, 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

OF

Pilot control valve

09

High-power valve (data sheet 23208)

6E

10

Direct voltage 12 V

G12

Direct voltage 24 V

G24

AC voltage 110 V 50/60 Hz / 120 V 60 Hz

W110

11

With concealed manual override

N9 2)

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

Electrical connection

14

Individual connection

Without mating connector; connector DIN EN 175301-803

K4 5)

Spool position monitoring

15

Without position switch

no code

Inductive position switch type QM

Monitored spool position "a"

QMAG24

Monitored spool position "b"

QMBG24

Monitored rest position

QM0G24

Inductive position switch type QS

Monitored spool position "a"

QSAG24W

Monitored spool position "b"

QSBG24W

Monitored spool position "0"

QS0G24W

Monitored spool position "0" and "a"

QS0AG24W

Monitored spool position "0" and "b"

QS0BG24W

Monitored spool position "a" and "b"

QSABG24W

For further details, see data sheet 24830

Stroke setting

16

For ordering code, see dimesnions

Throttle insert

17

Without throttle insert

no code

With throttle insert:

6)

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)

18

Without preload valve

no code

With preload valve (pö = 4.5 bar)

P4,5

19

Without pressure reducing valve

no code

With pressure reducing valve

D3 7)

Seal material

20

NBR seals

no code

FKM seals

V

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

21

Solenoid coil is an approved component with UR-marking according to UL 906

= UR

22

Further details in the plain text

*

pSt

Pilot pressure

ppilot min

Pilot pressure, minimum

ptank

Tank pressure

pö

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) The manual override cannot be allocated a safety function. The manual override units may only be used up to a tank pressure of 50 bar.
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 23208)!
- 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) Mating connectors, separate order, see data sheet 23208 and 08006
6) When the admissible valve performance limits are exceeded, installation of throttle inserts is to be intended (see performance limits).
7) Only in connection with the "B10" throttle insert

Technical data

general

Size

101625 (H-WEH22)25 (H-WEH25)32

Weight (approx.)

Valve with one solenoid

kg

6.48.511.517.6

Valve with two solenoids, spring-centered

kg

6.88.911.91941

Valve with two solenoids, pressure-centered

kg

6.88.911.91941

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

NBR seals

°C

-20 … +70

FKM seals

°C

-15 … +70

Storage temperature range

°C

+5 … +40

Surface protection

Valve body

Coating, layer thickness max. 100 μm

Maximum storage time

Years

1

MTTFD values according to EN ISO 13849

Years

100

hydraulic

Size

101625 (H-WEH22)25 (H-WEH25)32

Maximum operating pressure

Port P

bar

350

Anschluss A

bar

350

Port B

bar

350

Port T

External pilot oil return Y

bar

315250

Internal pilot oil return Y (direct voltage) 1)

bar

180

Internal pilot oil return Y (alternating voltage) 1)

bar

160

Port Y

Pilot oil return, external (direct voltage)

bar

180

Pilot oil return, external (alternating voltage)

bar

160

Hydraulic fluid

see table "Hydraulic fluid"

Hydraulic fluid temperature range 2)

NBR seals

°C

-20 … +80

FKM seals

°C

-15 … +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 pilot pressure 4)

bar

250210250

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

121412.5138.5

3-spool position valve, pressure-centered

bar

-14-188.5

2-spool position valve, spring end position

bar

10141310

2-spool position valve, hydraulic end position

bar

71485

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

2.045.727.6414.229.4

2-spool position valve

cm³

4.0811.4515.2828.458.8

3-spool position valve, pressure-centered

from zero position in switching position “a”

cm³

-2.83-7.1514.4

from switching position “a” in zero position

cm³

-2.9-715.1

from zero position in switching position “b”

cm³

-5.72-14.1529.4

from switching position “b” in zero position

cm³

-2.83-5.7314.4

Pilot flow for shortest switching time, approx.

l/min

3545
1)As a 3-spool position valve, pressure-centered only possible if ppilot ≥ 2 x ptank + ppilot min
2)At the valve working ports of the valve
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.
4)Pilot oil supply internal:

– 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.

Pilot oil supply external:

– Compliance with the maximum pilot pressure must be ensured by appropriate measures (e.g. protection of the separate pilot oil circuit by using a pressure relief valve).
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 (for 2-spool position valve) is so large that the pressure differential of P to T reaches a value of at least 7.5 bar. For a pressure differential below 7.5 bar, a check valve with a cracking pressure of 7.5 bar is to be provided in the return line to the tank. An external pilot oil supply Y is required.
6)Symbol S only for NG16
7)Pilot oil supply X internal is only possible for a pressure at P of minimum 4.5 bar.
For symbols with negative overlap F, G, H, P, T, V, (S only NG16), a certain flow from P to T in the central position is necessary for this purpose (see "characteristic curves").
For symbols C, HC, Z, HZ, a flow of >160 l/min is required during passing over the central position for NG16, for NG22, 25 and 32 a flow of >180 l/min.
If the required flows are not reached, a preload valve has to be used. When using a preload valve, the pressure differential of the preload valve of the corresponding size (see "Project planning information") is to be added to the corresponding pressure differential in case of direction of flow P ("see characteristic curves").

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

Size

101625 (H-WEH22)25 (H-WEH25)32

Spool Q

A – T; B – T

mm²

1332788378

Spool V

P – A

mm²

1332738373

A – T; B – T

mm²

1332848384

Spool W

A – T; B – T

mm²

2.46101420

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 (H-WEH 22)

Without throttle insert

ms

40 ... 70

40 ... 60

50 ... 70

With throttle insert

ms

140 ... 160

80 ... 110

50 ... 70

NG25 (H-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 values, please consult us!)

Diagrams/characteristic curves

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

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, 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.

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

Performance limits

2-spool position valve – qV max in l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring end position in the main valve 1)

(at minimum pilot pressure of 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 pilot pressure fails, the function of the return spring is no longer guaranteed with the specified flow values.

Performance limits

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)

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)

Performance limits

2-spool position valve – qV max in l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring end position in the main valve 1)

(at minimum pilot pressure of 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.

Performance limits

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)

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)

Performance limits

2-spool position valve – qV max in l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring end position in the main valve 1)

(at minimum pilot pressure of 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.

Performance limits

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)

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)

Performance limits

2-spool position valve – qV max in l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring end position in the main valve 1)

(at minimum pilot pressure of 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.

Performance limits

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)

Δp-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

Δp-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)

Performance limits

2-spool position valve – qV max in l/min

Symbol

Operating pressure pmax in bar

70

140

210

280

350

X external – spring end position in the main valve 1)

(at minimum pilot pressure of 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.

Performance limits

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

X external – pressure-centered

(at minimum pilot pressure of 15 bar)

all

1100

1100

1100

1100

1100

Performance limits : Important information

Notice (applies to all sizes):

The specified performance 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 performance 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 use, please consult us.

The performance limit was determined when 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 („H-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 pistons 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 („H-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 pistons 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").

Symbols/Circuit diagrams

2 spool positions

1)Only for NG10 and 25 ("W.H 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

Control spool return

Type H-WEH (electro-hydraulic)

A 1), C, D, K, Z

../..

..H../..

..H../O

..H../OF

B 1), Y

../..

..H../..

1)Only for NG10 and 25 ("W.H 22") with 3/2-way version; if operating pressure > tank pressure, port T is to be used as a leakage port.

3 spool positions

1)Example:
Symbol E with spool position "a" → ordering code ..EA..
2)Symbol S only for NG16
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

Control spool return

Type H-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”) Precondition for internal pilot oil supply and/or return (“ET”, “T”).

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"

Dimensions

Size 10

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

Dimension for valve with DC solenoid

6

Dimension () for valve with AC solenoid

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

Size 16

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

Dimension for valve with DC solenoid

6

Dimension () for valve with AC solenoid

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 (symbols B, Y)

17

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

19

Locking pin

NG25 („W.H 22“)

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

Dimension for valve with DC solenoid

6

Dimension () for valve with AC solenoid

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 („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

Dimension for valve with DC solenoid

6

Dimension () for valve with AC solenoid

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 (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

Dimension for valve with DC solenoid

6

Dimension () for valve with AC solenoid

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 (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

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

106.5
1610
25 (H-WEH22)9.5
25 (H-WEH25)12.5
3215

5 adjustment range

  • NG10:
    • 1 rotation = 1 mm adjustment travel
  • NG16 to 32:
    • 1 rotation = 1.5 mm adjustment travel

Stroke limitation on side A

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 symbol A only version "11", with symbol B only version "12" possible.
2) Version "H-WEH 22"
3) Version "H-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 symbol A only version "11", with symbol B only version "12" possible.
2) Version "H-WEH 22"
3) Version "H-WEH 25"

Spool position monitoring

Inductive position switch type QM

Dimensions in mm

1)Without mating connector

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

Project planning information

Switching time adjustment

Type 4WEH…S
;Type 4WEH…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 4W.H 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 („H-W.H 22“)

R961009609 (up to component series 76)

-

25 („H-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

Size 32

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.

Ordering codes

Downloads

Directional spool valves, pilot-operated, with electro-hydraulic actuation
Data Sheet | RE24802 | 2016-12-01 | English | PDF | 1.1MB

Product Groups: Pilot operated
Type WEH…=UR

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