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Артикул: RX7408

Все товары Bosch Rexroth

Directional spool valves, pilot operated, with mechanical-hydraulic actuation (rotary knob, lockable) H-.WMDAH

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Description

  • Size 10, 16, 25 (4W.H22), 25 (4W.H25), 32
  • Component series 4X, 7X, 6X
  • Maximum operating pressure 350 bar
  • Maximum flow 1100 l/min

Features

  • Type of actuation: Rotary knob, lockable
  • For subplate mounting
  • Porting pattern according to ISO 4401
  • Subplates according to data sheets 45054 to 45060 (separate order)
  • Spring centering, spring end position or hydraulic end position
  • Optional auxiliary operating device
  • Switching time adjustment, optional
  • Preload valve in channel P of the main valve, optional
  • Stroke setting at main spool, optional
  • Stroke setting and/or end position control, optional
  • Inductive position switch and proximity sensors (contactless)

Product description

Type 4WMMH …

Valves of type H–.WMDAH are directional spool valves with mechanical-hydraulic actuation. They control the start, stop and direction of a flow.

The directional valves basically consist 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).

The function of the valves corresponds to the function of valves of type WPH. The pilot control valve is, however, actuated mechanically.

Pilot oil supply

NG10

Pilot oil supply

NG16

Pilot oil supply

NG25 (type 4W.H 22 .7X/…)

Pilot oil supply

NG25 (type 4W.H 25 .6X/…)

Pilot oil supply

Size 32

Attention!

The pilot oil supply may only be modified by authorized specialists or at the factory!

– External pilot oil supply X or return Y :

  • with NG10, version SO30 has to be used if sandwich plates are installed. The identification SO30 has to be used at the end of the type designation (sandwich plate).
  • the maximum admissible operating parameters of the pilot control valve must be observed!
  • maximum pilot pressure: please observe Technical data!

Internal pilot oil supply (version “ET” and “E”):

  • minimum pilot pressure: please observe Technical data!
  • to prevent inadmissibly high pressure peaks, a “B10” throttle insert must be provided in port P of the pilot control valve.
  • in connection with version “H-”, the “D3” pressure reducing valve (see Pressure reducing valve) has to be installed in addition.

Type code

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

16

17

18

19

H –

WMDAH

/

F

6

/

*

01

Up to 350 bar

1; 2)

H –

02

3-way version

3

4-way version

4

Types of actuation

03

mechanical-hydraulic: Rotary knob, lockable

WMDAH

Size

04

NG10

10

NG16

16

NG25 (type 4W.H 22 .7X/…)

22

NG25 (type 4W.H 25 .6X/…)

25

Size 32

32

Spool return in the main valve

05

By means of springs

no code

hydraulic

3)

H

06

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

Component series

07

40 to 49 – NG10 (40 to 49: unchanged installation and connection dimensions)

4X

60 to 69 – NG25 (4W.H 25.) and NG32 (60 to 69: unchanged installation and connection dimensions)

6X

70 to 79 – NG16 (from series 72) and NG25 (4W.H 22.) (70 to 79: unchanged installation and connection dimensions)

7X

Spool return in the pilot control valve with 2 spool positions only possible with spools B, C, D and hydraulic control spool return in the main valve:

08

Without spring return with detent

F

Pilot control valve

09

with mechanical, manual actuation

6

10

Without manual override

no code

11

External pilot oil supply, external pilot oil return

1)

no code

Internal pilot oil supply, external pilot oil return

1; 2)

E

Pilot oil supply internal, pilot oil return internal

2)

ET

External pilot oil supply, internal pilot oil return

1)

T

12

Without switching time adjustment

no code

Switching time adjustment as supply control

S

Switching time adjustment as discharge control

S2

Spool position monitoring

13

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

14

Stroke setting see stroke setting in type key table

Throttle insert

15

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)

4)

16

without preload valve

no code

with preload valve (pö = 4.5 bar)

P4,5

17

without pressure reducing valve

no code

With pressure reducing valve

D3 4)

Seal material

18

NBR seals

no code

FKM seals (other seals upon request)

V

Observe compatibility of seals with hydraulic fluid used.

19

Information in the plain text

*

1) External pilot oil supply X or return Y:
– with NG10, version SO30 has to be used if sandwich plates are installed. The identification SO30 has to be used at the end of the type designation (sandwich plate).
– the maximum admissible operating parameters of the pilot control valve must be observed!
– observe the maximum pilot pressure!
2) Internal pilot oil supply (version “ET” and “E”):
– minimum pilot pressure: please observe Technical data!
– to prevent inadmissibly high pressure peaks, a “B10” throttle insert must be provided in port P of the pilot control valve (see Pilot oil supply).
– in connection with version “H”, the “D3” pressure reducing valve must be installed in addition.
3) 2 spool positions (hydraulic end position): only piston C, D, Y, K ,Z
4) only in connection with throttle insert “B10”

pSt

Pilot pressure

ppilot min

Pilot pressure, minimum

ptank

Tank pressure

pö

Cracking pressure

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

Technical data

general

Size

101625 (4W.H22)25 (4W.H25)32

Weight (approx.)

kg

6.48.511.517.6

Switching time adjustment

kg

0.8

Pressure reducing valve

kg

0.4

Installation position

any; horizontal with valves with hydraulic control spool return “H” and spool symbol B, C, D, K, Z, Y

Ambient temperature range

°C

-30 … +50

Storage temperature range

°C

-20 … +70

Surface protection

Valve body

Coating, layer thickness max. 100 μm

hydraulic

Size

101625 (4W.H22)25 (4W.H25)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 1)

bar

160

Port Y

Pilot oil return, external

bar

160

Hydraulic fluid 2)

see table

Hydraulic fluid temperature range

NBR seals

°C

-30 … +80

FKM seals

°C

-20 … +80

Viscosity range

mm²/s

2.8 … 500

Maximum admissible degree of contamination of the hydraulic fluid 3)

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

Maximum pilot pressure 4)

bar

250210250

Minimum pilot pressure

External or internal pilot oil supply X (with control spool D, K, E, J, L, M, Q, R, U, W)

3-spool position valve, spring-centered

bar

101412.5138.5

3-spool position valve, pressure-centered

bar

-14-188.5

2-spool position valve with spring end position

bar

10141310

2-spool position valve with hydraulic end position

bar

71485

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

bar

4.5 5)4.5 6) 7)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

from zero position in switching position “a”

cm³

4.0811.4515.2828.458.8

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)The ignition temperature of the process and operating medium used must be over the maximum solenoid surface temperature.
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 is required. In connection with version “H-”, the “D3” pressure reducing valve must be additionally provided. (If it is not used, pilot pressure = operating pressure at the port) External pilot oil return: In connection with version “H-”, compliance with the maximum pilot pressure must be ensured by appropriate measures (e. g. protection of the separate pilot oil circuit by means of 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 → T in the central position (for 3-spool position valve) or while crossing the central position (for 2-spool position valve) is so large that the pressure differential of P → T reaches a value of at least 6.5 bar.
6)Spool S only for NG16
7)For spools C, F, G,J, H, P, T, V, Z, S – by means of preload valve (not NG10) or correspondingly high flow. (Determination of the required flow, see preload valve)

Hydraulic fluid

Classification

Suitable sealing materials

Standards

Mineral oil

HL, HLP

FKM, NBR

DIN 51524

Bio-degradable

Insoluble in water

HEES (synthetic esters)

FKM

VDMA 24568

HETG (rape seed oil)

FKM, NBR

Soluble in water

HEPG (polyglycols)

FKM

VDMA 24568

Other hydraulic fluids on request

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

Size

101625 (4W.H22)25 (4W.H25)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

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)

Size 10

Δp-qV characteristic curves

Piston

Spool position

Piston

Zero position

P – A

P – B

A – T

B – T

A – T

B – T

P – T

E, Y, D

2

2

4

5

F

1

4

1

4

F

3

6

G, T

4

2

2

6

G, T

7

H, C

4

4

1

4

H

1

3

5

J, K

1

2

1

3

L

2

3

1

4

L

3

M

4

4

3

4

P

4

1

3

4

P

7

5

Q, V, W, Z

2

2

3

5

R

2

2

3

U

3

3

3

4

U

4

B

2

2

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

NG10

2-spool position valve – qV max

Piston

Operating pressure pmax in bar

200 bar

250 bar

315 bar

E, J, L, M, Q, R, U, V, W, C, D, K, Z, Y

160 l/min

160 l/min

160 l/min

H

160 l/min

150 l/min

120 l/min

G, T

160 l/min

160 l/min

140 l/min

F, P

160 l/min

140 l/min

120 l/min

Size 16

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 ±5 °C)

NG16

2-spool position valve – qV max

Piston

Operating pressure pmax in bar

70 bar

140 bar

210 bar

280 bar

350 bar

X external, spring end position in the main valve
(with ppilotmin = 12 bar)

C, D, K, Y, Z

300 l/min

300 l/min

300 l/min

300 l/min

300 l/min

X external – spring end position in the main valve

1)

C

300 l/min

300 l/min

300 l/min

300 l/min

300 l/min

D, Y

300 l/min

270 l/min

260 l/min

250 l/min

230 l/min

K

300 l/min

250 l/min

240 l/min

230 l/min

210 l/min

Z

300 l/min

260 l/min

190 l/min

180 l/min

160 l/min

X external – hydraulic end position in the main valve

HC, HD, HK, HZ, HY

300 l/min

300 l/min

300 l/min

300 l/min

300 l/min

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

3-spool position valve – qV max

Piston

Operating pressure pmax in bar

70 bar

140 bar

210 bar

280 bar

350 bar

X external – spring-centered

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

300 l/min

300 l/min

300 l/min

300 l/min

300 l/min

F, P

300 l/min

250 l/min

180 l/min

170 l/min

150 l/min

G, T

300 l/min

300 l/min

240 l/min

210 l/min

190 l/min

S

300 l/min

300 l/min

300 l/min

250 l/min

220 l/min

V

300 l/min

250 l/min

210 l/min

200 l/min

180 l/min

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

all spools

2)

300 l/min

300 l/min

300 l/min

300 l/min

300 l/min

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

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

Size 25 (type W.H 22)

Δp-qV characteristic curves

Piston

Spool position

Piston

Zero position

P – A

P – B

A – T

B – T

B – A

A – T

B – T

P – T

C, E, M, P, Q, U, V, Z

2

2

1

4

F

4

F

1

2

1

2

G, P

6

G, T

2

2

2

4

H

2

H, J, W, K, D

2

2

1

3

L

4

L

2

2

1

2

T

5

R

1

2

1

5

U

6

B

2

2

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

NG25 (type W.H 22)

2-spool position valve – qV max

Piston

Operating pressure pmax in bar

70 bar

140 bar

210 bar

280 bar

350 bar

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

C, D, K, Y, Z

450 l/min

450 l/min

450 l/min

450 l/min

450 l/min

X external – spring end position in the main valve

1)

C

450 l/min

450 l/min

320 l/min

250 l/min

200 l/min

D, Y

450 l/min

450 l/min

450 l/min

400 l/min

320 l/min

K

450 l/min

215 l/min

150 l/min

120 l/min

100 l/min

Z

350 l/min

300 l/min

290 l/min

260 l/min

160 l/min

X external – hydraulic end position in the main valve

HC./F...

HD./F...

HK./F...

HZ./F...

450 l/min

450 l/min

450 l/min

450 l/min

450 l/min

3-spool position valve – qV max

Piston

Operating pressure pmax in bar

70 bar

140 bar

210 bar

280 bar

350 bar

X external – spring-centered

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

450 l/min

450 l/min

450 l/min

450 l/min

450 l/min

H

450 l/min

450 l/min

300 l/min

260 l/min

230 l/min

G

400 l/min

350 l/min

250 l/min

200 l/min

180 l/min

F

450 l/min

270 l/min

175 l/min

130 l/min

110 l/min

V

450 l/min

300 l/min

240 l/min

220 l/min

160 l/min

T

400 l/min

300 l/min

240 l/min

200 l/min

160 l/min

P

450 l/min

270 l/min

180 l/min

170 l/min

110 l/min

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

Size 25 (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.

7

Spool G central position P – T

8

Spool T central position P – T

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

NG25 (type W.H 25)

2-spool position valve – qV max

Piston

Operating pressure pmax in bar

70 bar

140 bar

210 bar

280 bar

350 bar

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

C, D, K, Y, Z

700 l/min

700 l/min

700 l/min

700 l/min

650 l/min

X external – spring end position in the main valve

1)

C

700 l/min

700 l/min

700 l/min

700 l/min

650 l/min

D, Y

700 l/min

650 l/min

400 l/min

350 l/min

300 l/min

K

700 l/min

650 l/min

420 l/min

370 l/min

320 l/min

Z

700 l/min

700 l/min

650 l/min

480 l/min

400 l/min

X external – hydraulic end position in the main valve

HC./F...

HD./F...

HK./F...

HZ./F...

700 l/min

700 l/min

700 l/min

700 l/min

700 l/min

3-spool position valve – qV max

Piston

Operating pressure pmax in bar

70 bar

140 bar

210 bar

280 bar

350 bar

X external – spring-centered

E, L, M, Q, U, W

700 l/min

700 l/min

700 l/min

700 l/min

650 l/min

G, T

400 l/min

400 l/min

400 l/min

400 l/min

400 l/min

F

650 l/min

550 l/min

430 l/min

330 l/min

300 l/min

H

700 l/min

650 l/min

550 l/min

400 l/min

360 l/min

J

700 l/min

700 l/min

650 l/min

600 l/min

520 l/min

p

650 l/min

550 l/min

430 l/min

330 l/min

300 l/min

V

650 l/min

550 l/min

400 l/min

350 l/min

310 l/min

R

700 l/min

700 l/min

700 l/min

650 l/min

580 l/min

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

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

700 l/min

700 l/min

700 l/min

700 l/min

650 l/min

G, T

400 l/min

400 l/min

400 l/min

400 l/min

400 l/min

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

G, T

700 l/min

700 l/min

700 l/min

700 l/min

650 l/min

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

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

Size 32

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

Piston

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

Piston

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 ±5 °C)

Size 32

2-spool position valve – qV max

Piston

Operating pressure pmax in bar

70 bar

140 bar

210 bar

280 bar

350 bar

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

C, D, K, Y, Z

1100 l/min

1040 l/min

860 l/min

750 l/min

680 l/min

X external – spring end position in the main valve

1)

C

1100 l/min

1040 l/min

860 l/min

800 l/min

700 l/min

D, Y

1100 l/min

1040 l/min

540 l/min

480 l/min

420 l/min

K

1100 l/min

1040 l/min

860 l/min

500 l/min

450 l/min

Z

1100 l/min

1040 l/min

860 l/min

700 l/min

650 l/min

X external – hydraulic end position in the main valve

HC, HD, HK, HZ, HY

1100 l/min

1040 l/min

860 l/min

750 l/min

680 l/min

3-spool position valve – qV max

Piston

Operating pressure pmax in bar

70 bar

140 bar

210 bar

280 bar

350 bar

X external – spring-centered

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

1100 l/min

1040 l/min

860 l/min

750 l/min

680 l/min

G, T, H, F, P

900 l/min

900 l/min

800 l/min

650 l/min

450 l/min

V

1100 l/min

1000 l/min

680 l/min

500 l/min

450 l/min

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

all spools

1100 l/min

1040 l/min

860 l/min

750 l/min

680 l/min

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: 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.

Attention!

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 spools C, Z and HC, HZ.

If the 4/3 directional valves with pressure centering of the control spool in the main valve are used exceeding the specified performance limit, a higher pilot pressure is required. For example, with an operating pressure of pmax = 350 bar and a flow of qV = 300 l/min, you need a pilot pressure of 16 bar. The maximum flow for these valves thus only depends on the Δp value acceptable for the system.

With pilot oil supply X internal a preload valve (see preload valve) must generally be used due to the negative overlap of spools F, G, H, J, P, S and T.

NG25

  • 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").

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 spools Z, HZ and V.

If the 4/3 directional valves with pressure centering of the control spool in the main valve are used exceeding the specified performance limit, a higher pilot pressure is required. For example, with an operating pressure of pmax = 350 bar and a flow of qV = 1100 l/min, you need a pilot pressure of 15 bar. The maximum flow for these valves thus only depends on the Δp value acceptable for the system.

With pilot oil supply X internal a preload valve must generally be used due to the negative overlap of spools C, HC, F, G, H, P and T.

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

Symbols/Circuit diagrams

1)only for NG10 and 25 (4W.H 22.) if operating pressure > tank pressure, port T is to be used as a leakage port!
2)only type WMRH/WMUH and WMMH available.

Attention!

Caution in conjunction with differential cylinders due to pressure intensification!

Order details

Type of actuation

Symbol

Spool return

Rotary knob

C, D, K, Z

..H../F

3) Example:
– Spool E with actuating side “a” → ordering code ..EA..
– Spool E with actuating side “b” → ordering code ..EB..
4) Spool symbol E1-: P → A/B pre-opening

Attention!

Caution in conjunction with differential cylinders due to pressure intensification!

Order details

Type of actuation

Symbol

Actuating side

Spool return

Rotary knob

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

.A

..H../F

.B

..H../F

..H../F

Version QM0

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

Version QM0

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

Version QM0

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

version QMAB

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

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 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"

Inductive position switch type QM Switching logics

2 spool positions

3 spool positions

Dimensions

Project planning information

Switching time adjustment

Type 4W.H 10 ..4X/…S, type 4W.H 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 4W.H 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.

9.1

Preload valve NG16

9.2

Preload valve NG25 and NG32

10

Main valve

11

Subplate

Type

Material number P4,5

4W.H 16

R901002365

4W.H 22

R900315596

4W.H 25

R900303717

4W.H 32

R900317066

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

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

1

NG16

2

NG25 (type 4W.H 25 …)

3

NG25 (type 4W.H 22 …)

4

Size 32

Downloads

3/2, 4/2 and 4/3 directional valves, internally pilot operated, externally pilot operated
Data Sheet | RE24851 | 2008-08-01 | English | PDF | 1.1MB

Product Groups: Pilot operated
Types WPH, WHH, WMMH, WMDH, WMDAH, WMRH and WMUH
3/2, 4/2 and 4/3 directional valves pilot operated
Manual | RE24851-B | 2009-06-01 | English | PDF | 380k

Product Groups: Pilot operated
Type WPH, WHH, WMMH, WMDH, WMDAH, WMRH, and WMUH

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