DESCRIPTION FEATURES

4/2 and 4/3-directional spool valves

lever operated

4WMH 6 to 10

HYDAC 4/2- and 4/3- directional

spool valves of the 4WMH series are

directional valves for oil hydraulic

systems, which are used for direction

control of oil flow.

The valve is operated by a hand

lever.

The mechanism pushes the control

piston of the valve to the respective

position to obtain the desired flow

paths.

• Interface to ISO 4401

• Versions with two or three switching positions, with return spring or

mechanical detent

• Valve body with high stability and low flow losses

• NG6: Position of the hand lever can be turned by 180°

CONTENT

Description 1

Features 1

Model code 2

Accessories 2

Spool types / Symbols 3

Technical Data 4

Function 4

Section view 4

Performance 5

Dimensions 6

EN 5.227.4. 0_05.22

MODEL CODE

4WMH 6 E – F 01 / V

Type

Manually operated directional valves with hand lever and 4 main ports

Nominal size (NG)

6, 10

Spool types

see page 3

Design

Not specified = with return spring

F = withoud spring, with detent

Series

01 = determined by the manufacturer

Sealing material

V = FKM (standard)

N = NBR

ACCESSORIES

Designation Part no.

Seal kits

NG6: 9,25 x 1,78 80 Sh NBR 3492432

9,25 x 1,78 80 Sh FKM 3120269

NG10: 12,42 x 1,78-NBR -80Sh 4348706

12,4 2x 1,78-FKM -80Sh 4348705

Mounting screws

(4 pcs)

NG6: DIN EN ISO 4762 - M5 x 50 - 10.9 4312231

NG10: DIN EN ISO 4762 - M6 x 40 - 10.9 3524314

EN 5.227.4. 0_05.22

4/2- DIRECTIONAL SPOOL VALVES 4/3- DIRECTIONAL SPOOL VALVES

Type Symbol with intermediate position

D-F

NG6 only

C-F

NG6 only

EA-F

HA-F

JA-F

GA-F

Type Symbol with intermediate position

E-F

H-F

J-F

G-F

SPOOL TYPES / SYMBOLS

EN 5.227.4. 0_05.22

FUNCTION

SECTION VIEW

* see "Conditions and instructions for Valves"“ in brochure 53.000

The manually operated directional

spool valve of the 4WMH series are

used for directional control of flow.

The valves consists of a valve casing

(1) and a valve piston (2).

Depending on the version, the valve

is equipped with a return spring or a

detent (option F).

The valve piston is held in its initial

position by the return spring.

The valve is operated by a hand

lever (3).

The mechanism pushes the control

piston of the valve to the respective

position to obtain the desired flow

paths.

The hand lever is locked with option

F, so the is held in its position.

If the lever is returned after

actuation, the piston is moved back

to its initial position by the return

spring.

TECHNICAL DATA *

General specifications

Nominal size

610

MTTFd

150 - 1200 years, according to DIN EN

ISO 13849-1:2016; Table C.1,

confirmation of ISO 13849-2:2013;

Tables C.1 and C.2

Ambient temperature [°C] -20 to +60

Installation position

without detent: no orientation restrictions

with detent: horizontal (direct axis)

Weight [kg] 1,3 4,2

Hydraulic specifications

Nominal size

610

Operating pressure port A, B, P [bar] 350 320

Operating pressure port T 210 160

Flow range [l/min] see Performance on page 5

Operating fluid

Hydraulic oil to DIN 51524 part 1, 2

and 3

Viscosity range [mm²/s] 10 to 400 (25 is recommended)

Permitted contamination level

of operating fluid

class 20/18/15 to ISO 4406

Sealing material FKM (standard), NBR

EN 5.227.4. 0_02.22

The performance curves represent the valve's areas of

application for different spool types depending on flow rate

and operating pressure. The values are taken according to

ISO 6403 standard, with mineral oil viscosity of 36 mm²/s, at

an operating temperature of 50 °C and filters according to

ISO4406:1999 class 18/16/13.

HINT

The values in the diagrams are valid for normal operation.

The performance limits can be reduced considerably, e.g. if a

4-directional valve with blocked port A or B is operated.

Performance assignment to the associated spools:

spool

Pressure drop Performance

limits

(P-A/P-B)

P-A P-B A-T B-T P-T

E, EA 2 2 3 3 1

H, HA 1 1 3 3 (2) 1

J, JA 3 3 1(3) 1(3) 1

G, GA 4 4 4 4 (3) 2

D3333 1

C2222 1

(*): valve in basic position

Performance limits

measured at ν = 36 mm²/s, T= 50 °C

Pressure drop

measured at ν = 36 mm²/s, T= 50 °C

PERFORMANCE

NG6

Pressure drop

measured at ν = 36 mm²/s, T= 50 °C

NG10

Performance limits

measured at ν = 36 mm²/s, T= 50 °C

Performance assignment to the associated spools:

spool

Pressure drop Performance

limits

(P-A/P-B)

P-A P-B A-T B-T P-T

E, EA 2 2 1 1 1

H, HA 3 3 1 1 (5) 1

J, JA 3 3 2(6) 2(6) 1

G, GA 1 1 2 2 (5) 2

D3322 1

(*): valve in basic position

EN 5.227.4. 0_05.22

Interface to ISO 4401-03-02-0-05

DIMENSIONS NG6

4/3-way

4/2-way

Mounting screws:

(not included in delivery)

DIN EN ISO 4762- M5x30- 8.8

Torque: 5 Nm

HINT

The valve is supplied with the hand lever pointing orthogonally

to the interface. The lever can be turned 180° for different

applications.

EN 5.227.4. 0_05.22

Note

The information in this brochure relates to the

operating conditions and applications described. For

applications not described, please contact the

relevant technical department.

All technical details are subject to change without

notice.

HYDAC Fluidtechnik GmbH

Justus-von-Liebig-Str.

D-66280 Sulzbach/Saar

Tel: 0 68 97 /509-01

Fax: 0 68 97 /509-598

E-Mail: valves@hydac.com

DIMENSIONS NG10

CETOP 4.2-4-05-320

Mounting screws:

(not included in delivery)

DIN EN ISO 4762- M6x40- 8.8

Torque: 8 Nm

4/3-way

4/2-way

HINT

The orientation of the hand lever can not be changed.

EN 5.227.4. 0_05.22