Directional valve size NG 16

WL 4.16

Installation dimensions ISO 4401 / DIN 24340 A16

electro-hydraulically pilot operated

Directional valve size WL 4.16 Installation dimensions ISO 4401 / DIN 24340 A16

A pilot valve operates the main control valve electrohy-

draulically. For operating the pilot valve, pressure-tight

direct and alternating current magnets can be fitted

switching in oil.

The control piston for the main control valve is operated

by the flanged pilot valve directly subject to actuating

pressure and switched to indexing position a or b.

The buncher space or spring chamber is formed by two

flanged covers that can also be fitted with a stroke limiter.

The control oil in- and outlet can be individually switched

to internal or external.

Description

The main control valve is available in the following control

piston feedback models:

Pilot valve Main control valve

1. Spring-centred central position – Spring-centred central position

2. Spring-centred final position – Without spring return

3. Without spring feedback – Without spring return

4. With locking final position – Without spring return

Actuating pressure is required with model 4 for fixing the

final position of the main control valve.

Statistics

Hydraulic statistics

Operating pressure

Connector P, A, B, T p

max.

= 315 bar page 8

Connector X p

max.

= 315 bar

Connector Y p

max.

= 100 bar

Temperature

of pressurizing

medium

m min.

=--20°C

m max.

=+80°C

Viscosity ν

min.

= 13 mm

⁄s (cSt)

max.

= 380 mm

⁄s (cSt)

Functions Pages 4 and 5

∆ p-Q-characteristic

curve Pages 7 and 8

Hydraulic fluids Hydraulic oils according to

DIN 51524/25 Highly flammable

liquids on request

Operating mode

Hydraulically

Electrohydraulically Statistics on pages 6 and 8

WL 4.06 pilot valve

Accessories

Stroke limiter Page

Counterbalance valve Page

Check valve Page

Connection panels Page 10

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General statistics

Description

⁄

and

⁄

directional valves

Design Slide damper

Method of fixing Flange

Line connector Connection panel R

⁄

", R1"

Dimensions Page 9

Weight Page 9

Fitting position Optional, preferably

horizontal

Direction of flow See symbols

Environmental temperature

U max

= + 50 °C

Function Symbol Pilot

valve

331

Directional valve size WL 4.16 Installation dimensions ISO 4401 / DIN 24340 A16

Main control valve – the blanks marked with spaces are to be completed with the following codes:

1. Function 2. Pilot valve 3. Stroke limiter (spring-centred) 4. Control oil

Inlet Outlet

D with

P without

H0 without

only on side A

works in indexing position b

only on side B

works in indexing position a

H4 both sides

F internal external

V internal external with counterbalance valve

B internal internal

W internal internal with counterbalance valve

G external external

C external internal

See explanation on page 7

WL 4 . 16 XD2 ...

Pilot valve NG 06

5. Spring return

3 with

6 without

WL 4 . 16 XP2 . M .

Spring return

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ENZ

(..R)*

HEZ

(..R)*

SEZ

(..R)*

Function Symbol Pilot

valve

30**

331

30**

(..R)*

FDZ

(..R)*

SEZ

(..R)*

without check valve

e.g. ENZ

used indexing position

unused indexing position

vertical cover (positive)

vertical cover (negative)

with check valve

e.g. ENR

Key to symbols:

Page 6

Spring return

vertical cover

throttled (positive)

Directional valve size WL 4.16 Installation dimensions ISO 4401 / DIN 24340 A16

Main control valve – the blanks marked with spaces are to be completed with the following codes:

1. Function 2. Pilot valve 3. Stroke limiter (spring-centred)

D with

P without

H0 without

only on side A

works in indexing position b

only on side B

works in indexing position a

H4 both sides

5. Spring return

Ordering example

WL 4 ENZ 16 XD2 HOV6 + WL 4 SF06 P1 EG6 Z 23050 + MWL4 16 R2 AO

main control valve pilot valve single connection panel

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With spring return 0: WL4 AP 06 P1 pilot valve..

With spring return 1: WL4 BP 06 P1 pilot valve..

4. Control oil

Inlet Outlet

F internal external

V internal external with counterbalance valve

B internal internal

W internal internal with counterbalance valve

G external external

C external internal

See explanation on page 7

Function Symbol Pilot

valve

331

30**

FDZ

(..R)*

AFZ

(..R)*

SFZ

(..R)*

SFDZ

(..R)*

Function Symbol Pilot

valve

30**

31**

FVZ

(..R)*

ANZ

(..R)*

EVZ

(..R)*

WL 4 . 16 XD2 ...

Pilot valve NG 06

3 without

6 with

WL 4 . 16 XP2 . M .

Spring returnSpring return

Page 6

Without stroke limiter

One-sided stroke limiter on side A

Works in indexing position b

One-sided stroke limiter on side B

Works in indexing position a

Two-sided stroke limiter

The stroke limiter is described as an adjustable stop

in the valve’s vertical cover for adjusting the control

piston stroke. Stroke reduction means area reduction,

i.e., throttle effect or flow regulation.

An indexing position may also become completely

blocked.

Other stroke limiters on request.

Stroke limiter

Code

Directional valve size WL 4.16 Installation dimensions ISO 4401 / DIN 24340 A16

Ordering code

Pilot valve – the points marked with spaces are to be completed with the following codes:

1. Magnet 3. Connector plug

according to

DIN 43650

2. Spring return

for pilot valve:

pages 4 and 5

4. Rated voltage

WL 4 . 06 P1 ....

Alternating current-M

Direct current-M

Explosion protection

on request

without response time adjustment

Plug-in nozzles are available for adjusting response times

for channel P on the pilot valve.

(on request)

with

without

01200

02400

23050

12 V Direct current

24 V Direct current

230 V Alternating current 50 ... 60 Hz

** preferably

other voltages on request

NG 06

Basic functions

Function Symbol

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Electrical statistics

For direct and alternating current magnets

Permissible tolerance of rated voltage DC: --10 ... +6 %

AC: ±10 %

Max. operating cycles 15000 switches/h

Turn on time at U

and viscosity 20 mm

⁄s

-1

DC: 30 ... 50 ms

AC: 30 ... 40 ms

Turn off time with viscosity 20 mm

⁄s

-1

DC: 10 ... 50 ms

AC: 30 ... 70 ms

Max. permissible load factor 100 %

Durability of directional valves –

Number of switching cycles 10

Protection class in accordance DIN 40 050 IP 65

Other functions on request

Directional valve size WL 4.16 Installation dimensions ISO 4401 / DIN 24340 A16

Control oil in- and outlet

Counterbalance valve in connector P

Counterbalance valves are used for valves with

pressure-free circulation and internal withdrawal

of control oil. The counterbalance valve also

functions as a check valve in connector P.

Ordering code: 3301121/4

Check valve in connector P

A check valve can be built into connector P in

order to prevent volume displacement from the

client to connector P when activating statically

loaded clients.

Ordering code: 3301122/4

A check- or counterbalance

valve can also be installed.

Conversion is not possible.

The flow resistance is to be

added to the flow value

P-A; P-B; P-T

(∆ p-Q-characteristic curve

page 8).

The flow resistance is to be

added to the flow value

P-A; P-B; P-T

(∆ p-Q-characteristic curve

page 8).

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Code

Control oil Simplified symbol Detailed symbol Diagram

F X internal

(V) Y external

B X internal

(W) Y internal

G X external

Y external

C X external

Y internal

Remote

controlled

Note

Not possible with functions

F ENZ, SEZ, HEZ, EVZ;

Function ANZ at Q ≤ 60 l/min

V Possible

Not possible with functions

B ENZ, SEZ, HEZ, EVZ;

Function ANZ at Q ≤ 60 l/min

W Possible

Possible

■ with set screw

M6 x 8 DIN 913 closed (SW 4)

■ Throttle screw according to drawing

4302803/4 screwed in (SW 4)

Note:

For control oil adjustment X and Y,

first remove the screw plug

M10 x 1 keg DIN 906 (SW 5)

Flow rate Q in l/min

Flow resistance ∆ p in bar

Flow resistance ∆p in bar

Note: With internal control oil in- and outlet,

the connectors X and Y

in the connection panel must be closed.

Remote controlled

Directional valve size WL 4.16 Installation dimensions ISO 4401 / DIN 24340 A16

Operating pressure / flow rate

The breaking capacities stated refer to simultaneous valve flow, e.g., P-B and A-T.

max.

)

[l/min] at

➀ The flow rate Q = 250 l/min is a recommended rate.

This can be up to Q = 300 l/min taking account

of higher flow resistance.

➁ In the case of pressure flow rate values above the

values stated and the flow resistance of subordinate

importance (see ∆ p-Q-characteristic curve),

the pressure-centred recirculation is to be used

(on request).

∆∆

p-Q-characteristic curve

Viscosity ν = 33 mm/s (cSt)

Characteristic curve ∆ p = f (Q)

For all functions except SEZ, FZ, ENZ, EVZ For functions SEZ, FZ For functions ENZ, EVZ

Control characteristics

Pilot pressure: main control valve

with spring return p

= 8,5 ... 315 bar

with spring return for functions

ENZ, EVZ p

= 10,0 ... 315 bar

without spring return p

= 5,0 bar

with servo cartridge for functions

ENZ, SEZ, HEZ, EVZ, SEVZ p

= ∆ p-Q-Characteristic curve

(see above)

+ flow resistance P-T

Pilot volume: main control valve

with spring load indexing positions o in a; o in b v

= 4,2 cm

indexing position o in a; o in b for functions ENZ, EVZ v

= 4,9 cm

without spring return indexing position a in b v

= 8,4 cm

indexing position a in b for functions ENZ, EVZ v

= 9,8 cm

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Function p = 150 bar p = 210 bar p = 315 bar

FZ, FDZ, SFZ, SFDZ

AFZ, FVZ ➀

250

(300)

250

(300)

250

(300)

ENZ, SEZ, ANZ, HEZ,

EVZ ➁

200

(230)

180 140

Flow resistance ∆ p in bar

Flow rate Q in l/min Flow rate Q in l/min Flow rate Q in l/min

Turn on times

(Pilot valve and main control valve)

(Alternating current) with pilot valve NG 06

Main control valve p

[bar] 50 100 200

With spring return

Indexing position o in a; o in b t

[ms] 130 120 100

Without spring return

Indexing position a in b t

[ms] 250 220 180

Turn on times are increased by

30 ms in case of direct current.

Turn off times

With spring return t

[ms] 100

Directional valve size WL 4.16

Dimensions (in mm)

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1 Actuating magnet a

2 Actuating magnet b

3 Emergency manual

override

4 Name plate

5 Rectangular ring 9,25 x 1,68 x 1,68 mm

included in delivery

Fitted with 2 magnets

Weight 2,2 kg

Fitted with 1 magnet

Weight 1,6 kg

Valve fixing screws and spring rings

are included in the delivery.

4 x M 10 x 60 DIN 912 --10.9

4 x spring rings 10 DIN 7980

2 x M 6 x 55 DIN 912 --10.9

2 x spring rings 6 DIN 7980

Weight

➀ H 0 without stroke limiter 7,8 kg

➁ H 3 with stroke limiter on side B 8,3 kg

➂ H 2 with stroke limiter on side A 8,3 kg

➃ H 4 with stroke limiters on both sides 8,8 kg

Main control valve WL 4.16 Installation dimensions ISO 4401 / DIN 24340 A16

Pilot valve WL 4..06 P1..installation dimensions ISO 4401 / DIN 24340 A6

Deflector plate for valve WL 4.16 XP2.M.

included in delivery

Weight 0,4 kg

6 4 Valve fixing hole

7 DIN 43650 connector plug

8 Measurement A for removing

the plug

Directional valve size WL 4.16 Installation dimensions ISO 4401 / DIN 24340 A16

Type code

Rating

MWL 4

Connectors Gﬂ 16

Connectors G1 18

Inlet

Code

internal external A

external external B

internal internal C

external internal D

Closure

0 All 4 Connectors open

1 Connector A closed

2 Connector B closed

3 Connector P closed

4 Connectors A+B closed

5 Connectors B+P closed

6 Connectors A+P closed

7 Connectors A+T closed

8 Connectors B+T closed

9 Connector T closed

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Ordering code:

MWL 4 16 R2 . .

Ordering code:

MWL 4 18 R2 . .

Installation

dimensions A16

DIN 24340

Connectors:

P, T, A, B: G 3/4

X, Y: G 1/4

Installation

dimensions A16

DIN 24340

Connectors:

P, T, B, A: G 1

X, Y: G 1/4

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