Solenoid Operated Spool Valve, ISO size 5

Direct Acting, Soft Switching

Series WEDEU ...

Reference: 400--P--185310--EN--A/09.15

1/4 430.20.60.81

Replaces: W--31.20A

Classification:

S 315 bar, 100 l/min

S Switching time is steplessly variable

from outside the valve

S Full adjustment range is 150 ... 1500

S Special opening geometry, high s wit-

ching performance

S High flow rates

S Good ∆p -- Q values: no narrowing of

flow paths in energised position

S Slip-- on coils: coils can be changed

without opening the hydraulic enve-

lope

S Pressures to 315 bar in P, A and B

S Mounting interface to ISO 4401 /

CETOP R35H size 5, NFPA D05,

DIN 24 340 A10

Solenoid b

Solenoid a

1. Description

Series WEDEU ...-- 10 solenoid oper-

ated spool valves are direct acting units

that provide smooth, shock --free accel-

eration, deceleration and reversal of

hydraulic cylinders and motors. The

design incorporates low--cost ramp

controls that are entirely hydraulic in

operation. The principal components

of the valve are a cast body, a control

spool with centering springs, and wet

armature solenoids with high--pressure

core tubes and slip--on coils (DC only).

A coil can be replaced, or the voltage

changed, without opening the hy-

draulic envelope. The valve switching

time is adjusted by means of a flow--

control s crew that is accessible from

the outside of the valve. The effect of

the throttle is to reduce the rate of oil

transfer between the two spring

chambers. This, in turn, dictates the

speed at which the spool shifts. To en-

sure that the spring chambers are

purged of air and completely filled with

oil when the valve is commissioned, it

must be operated through 6 ... 12 com-

plete cycles (spool stroked end -- to --

end) with the flow control screw turned

fully open. After this has been done, the

flow control needle can then be

screwed in half a turn at a time (2 mm

Allen key required) until the required

switching time is attained. Warning:the

flow control must never be screwed in

fully i.e. until it ”bottoms” -- this would

prevent any transfer of oil and the valve

would no longer function. The system

design must ensure that air cannot be

sucked back through the tank line. To

provide a r eliable oil supply to the two

spring chambers, the minimum tank

line back pressure should be 1 bar.

2. Symbols

WEDEU--42--A--10 WEDEU--42--AD--10

WEDEU--42--AG--10

WEDEU--42--BD--10

WEDEU--42--BG--10

WEDEU--43--D--10

WEDEU--43--G--10

WEDEU--42--B--10

WEDEU--42--AH--10 WEDEU--42--BH--10 WEDEU--43--H--10

WEDEU--42--AJ--10 WEDEU--42--BJ--10 WEDEU--43--J--10

A B

13 19

WEDEU--42--B--10

WEDEU--42--AN--10

WEDEU--42--AGG--10 WEDEU--42--BGG--10

WEDEU--43--GG--10

Crossover transients

4/2 FUNCTIONS

WITH 4/3 SPOOLS

4/2 FUNCTIONS

WITH 4/3 SPOOLS

4/3 FUNCTIONS

400--P--185310--EN--A/09.15

2/ 4

3. Characteristics

Type 4/2 and 4/3 solenoid operated directional spool valves

Design direct acting, soft--switching

Mounting method manifold mounting

Size nominal size 10 mm, ISO 4401 size 5 interface

Mass kg 4,8 (1 solenoid), 6,3 (2 solenoids)

Mounting attitude horizontal recommended

(vertical mounting makes purging of air more difficult)

Flow direction see symbols

Operating pressure bar max. 315 in P, A und B; max. 160 in T

Switching frequency cycles/h 1200

Flow rate Qmax l/min 100, see Performance graphs

Fluids Hydraulic oils HL and HLP to DIN 51 524

Fluid temperature range _C --25 ... + 80

Ambient temperature _C --25 ... + 50

Viscosity range cSt 10 ... 500, recommended 15 ... 250

Minimum fluid cleanless 18/14 to ISO 4406 /CETOP RP70H 8 ... 9 to NAS 1638

Solenoid type high pressure, wet ar mature type (with slip -- on coils)

Standard voltages VDC 12 / 24 / 196 (with integral bridge rectifier in the connecting

plugs) -- for other voltages -- contact BUCHER

Nom. voltage tolerance % ±10

Nom. power consumption W 39

Duty cycle % 100

Enclosure protection IP 65 to DIN 40 050

Electrical connection 3--pin square plug to DIN 43 650 / ISO 4400;

can be turned 4 x 90°

4. Performance graphs

Oil viscosity 33 cSt

20 100

40 60 80

30 50 70

100

125

150

175

200

20 40 60 80

A-- / B spools

D spool

G spool

H spool

J spool

⇒

B ⇒ T

P ⇒T

P ⇒A

P ⇒B

3356

-- -- -- -- 5 6

-- -- -- -- -- -- -- --

2218

10 30 50 70

100

150

350

20 40 60 80

250

300

200

90 100

AN-- / BN spool

2245

GG spool

3367

1167

-- -- -- -- 9 9

2256

Solenoid

OFF

2245----

-- --

23 56

0VDC

D Solenoid force: = ± 15 % voltage variation

= ± 50 % switching time

D Cold / hot solenoid: = ± 20 % switching time

D Flow rate Q (l/min): = influences values 3 + 6

(lower Q = shorter t)

D Pressure diff. ∆p (bar): = ± 75 % change in ∆p

= ± 10 % switching time

→ Q(l/min)

→ Q(l/min)→ Q(l/min)

→∆p(bar)

” ∆p(bar)

∆p --Q characteristics

Application limits

The quoted maximum flow rates apply when the

flows passing through the valve are equal in both

directions (symmetrical). For non--symmetrical

flows, the maximum rates are substantially redu-

ced, in worst cases to only 1/3 of the above values.

The values 1 and 4 are jointly controlled by the setting of the

flow control, but it is usually the case that they are not equal.

Both values normally fall in the range 150 ... 1,500 ms. The

switching times are also strongly influenced by the following

factors:

There are a large number of factors that cannot easily be pre--determined. This means that the flow

control cannot be factory--set and adjustment on--site is therefore essential. This is simple in practice,

thanks to the externally--accessible flow control.

OFF

Switching times

1 = total energising time

2 = time until flow paths begin to open

3 = time for solenoid to open spool fully

4 = total spring--return time

5 = time until flow paths begin to close

6 = time for spring to close spool fully

400--P--185310--EN--A/09.15

3/ 4

5. Dimensions

ø65

215

107

97 11

ø65

215

107

9711

13approx. 115

ø65

107 97 107

311

21,5 54

46 12

110

PG 9

ø 15,6

1,3

PG 9

Plug can be

turned 4 x 90

Coil can be

secured at

any angle

through

360

supplied complete with

4 hex. skt. cap screws

M6 x 40. Tightening torque

Ma = 8 ... 10 Nm

to remove

the coil

Manual override

at solenoid end(s)

4/2 function, B v alve4/2 function, A v alve

to remove

the plug

Nameplate

ISO 4401 size 5 interface

Solenoid a

Solenoid b

Solenoid a

Solenoid b

4/3 function

6. Schematic section

Sealkit no. DS--122-- V, comprising:

Itm.

Qty

Description Size

1 5 O--ring no. 014 ∅ 12,42 x 1,78 V

2 2 O--ring no. 118 ∅ 21,89 x 2,62 V

3 1 O--ring no. 012 ∅ 9,25 x 1,78 V

4 2 O--ring ∅ 30,00 x 2,00 N70

5 2 O--ring ∅ 30,00 x 2,00 N70

6 1 O--ring no. 010 ∅ 6,07 x 1,78 V

Manual

override

30 A/F hex.

Tightening torque

Ma = 45 ... 55 Nm

27 A/F

Tightening torque

Ma = 45 ... 55 Nm

400--P--185310--EN--A/09.15

4/ 4

7. Installation and servicing

All installation and servicing must be

carried out with care, and by qualified

personnel only. The following points

must be observed: ”A” (and ”B”) spools

must not be reversed, or the function P

⇒ A/B⇒ T will become P ⇒ B/A⇒ T

(and vice versa for ”B”). All other spools

are symmetrical, but should always be

reassembled with their original orienta-

tion, in any case. When changing

seals, the new seals must be thor-

oughly oiled or greased before they are

fitted. Use the specified tightening

torques when fitting the spring cap, DC

and the core tube. At installation, make

sure that the valve interface aligns with

the interface of the mating s urface, and

use the specified tightening torque

when fitting the valve mounting bolts.

8. Model code key

Directional valve, solenoid

operated, direct acting

soft--switching

4/2 function

4/3 function

4/2 function, A spool

4/2 function, A spool, open x--over

4/2 function, B spool

4/2 function, B spool, open x--over

Voltage and current plainly specified

1 ... 9

Special seals by arrangement

AD/AG/AH/AJ/AGG

BD/BG/BH/BJ/BGG

D/ G/ H/ J/ GG

design number (omit when ordering new units)

Viton seals

ISO size 5 interface (nominal size 10 mm)

= 4/2 function with 4/3 spool, solenoid ”a

= 4/2 function with 4/3 spool, solenoid ”b

= 4/3 function

W E D E U -- 4 3 -- D -- 1 0 -- V -- 1 -- 2 4 V D C

9. Related data sheets

Old no. New no.

i--00 400--P -- 010101-- E Table of interface equivalents

i--41 400--P -- 050101-- E DIN 24 340 size A10 interface

E 2015 by Bucher Hydraulics AG Frutigen, CH-3714 Frutigen

www.bucherhydraulics.cominfo.ch@bucherhydraulics.com

Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The

information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual

improvement, we reserve the right to amend the product specifications contained in this catalogue.