2/2…4/3 Solenoid Directional Seat Valve, ISO Size 03

max

= 20l/min (5.3 gpm),p

max

= 315bar (4500 psi)

Bidirectional leak-proof shutoff, direct acting, with EX-safety solenoid coil

Series EEX-W2N…

1/7

Reference: 400-P-115210-EN-02

Issue: 02.2018

Valve:

S With cartridge valve, type EEX-W1.B…

S Interface to ISO 4401-03-02

S Bidirectional leak-proof shutoff or flow

S De-energised closed

S Guided valve spool and poppet

S Available in two mounting versions

S With or without manual override

Solenoid coil:

S To IEC/EN 60079-0, IEC/EN 60079-7,

IEC/EN 60079-18

S For equipment in Category 2 (Zones 1 and 2)

S Certificate of conformity:

BASEEFA 02 ATEX 0199 X

II 2 G Ex e mb IIC T4 Gb

1 Description

The EEX-W2N… series of 2/2 … 4/3 solenoid operated di

rectional seat valves are direct acting, pressure balanced,

manifold-mounting valves with a size 03 interface to ISO

4401-03-02. An EX-protected solenoid for explosive gas at

mospheres (II 2 G) is used to provide electrical operation of

the cartridge. The main components of the valves are a ma

nifold-mounting body and the push-in 2/2 or 3/2 directional

seat valve cartridge (type EEX-W1.B…). Dependent on the

operating position, the ports are either closed with virtually

zero leakage, or open and flow is possible in either direction.

These solenoid operated seat valves are also available with

or without manual override lever. For applications where a

check valve or an orifice in the P port is necessary, either of

these features can be included as an option. They are suita

ble where leak-tight shut-off functions are crucially import

ant. Examples are where loads, tensions, or clamping

forces must be held without leakage. All external parts of the

valve are corrosion-protected, and the valves are thus also

suitable for use outdoors.

Ex: Solenoid conforms to the European standards

IEC/EN 60079-0, IEC/EN 60079-7, IEC/EN 60079-18

e: Increased safety

mb: Encapsulation

Group IIC: For use in explosive gas atmospheres

T4: Max. surface temperature 135 °C

Gb: For use in Zone 1 (Zone 2) with foreseeable faults

Certificate of conformitys:

BASEEFA 02 ATEX 0199 X

IECEx BAS13.0093 X (on request)

2 Technical data

General characteristics Description, value, unit

Designation 2/2, 3/2, 3/3 or 4/3 solenoid operated

directional seat valve

Design manifold-mounting, bidirectional leak-proof shutoff,

direct acting poppet and valve-spool design

(pressure balanced) with EX-protected solenoid

Mounting method 4 x  5.5 holes for M5x30 cap screws

Tightening torque 5.2 Nm  10 % (4 ft-lbs  10 %)

Size size 03 interface to ISO 4401-03-02 / DIN 24 340 A6

400-P-115210-EN-02/02.2018

Series EEX-W2N…

2/7

Description, value, unitGeneral characteristics

Weight 2.3 kg (1 solenoid)

3.6 kg (2 solenoid)

Mounting attitude unrestricted

Ambient temperature range see hydraulic and electrical characteristics

Hydraulic characteristics Description, value, unit

Maximum operating pressure 315bar (4500 psi)

Maximum flow rate 20 l/min (5.3 gpm)

Flow direction see symbols

Hydraulic fluid HL and HLP mineral oil to DIN 51 524;

for other fluids, please contact BUCHER

Ambient temperature range

-25°C … +80°C (-13 °F … +176 °F)

Hydraulic fluid temperature range

-25°C … +80°C

(-13 °F … +176 °F)

Viscosity range 10…500mm

/s (cSt), recommended 15...250mm

/s (cSt)

Minimum fluid cleanliness

Cleanliness class to ISO 4406:1999

class 20/18/15

Electrical characteristics Description, value, unit

Supply voltage 24V DC

230V AC

In AC solenoids, rectifier is integrated.

Supply voltage tolerance ±10%

Ambient temperature range

-40°C … +40°C (-40 °F … 104 °F)

(operation as T4)

Temperatue class T1 … T4

EX-protection marking II 2 G, Ex e mb IIC T4 Gb

Nominal power consumption 31,9 W at 20 °C (31.9 W at 68 °F)

Relative duty cycle 100%

Protection class to ISO20653 / EN60529 IP54

(with properly fitted cable gland and properly made cable connection)

Electrical connection Shipped without cable gland (M20 x 1.5) and without cable

Cable-entry temperature may exceed 70 °C

IMPORTANT!:

The less favourable values from the hydraulic

and electrical characteristics determine the tem

perature range of the whole valve.

IMPORTANT!:

The maximum fluid temperature must not ex

ceed the permissible ambient temperature for the

whole valve.

400-P-115210-EN-02/02.2018

Series EEX-W2N…

3/7

3 Performance graphs

IMPORTANT!

Detailed performance data and other hydraulic

characteristics can be found in the data sheet for

the respective 2/2 or 3/2 solenoid operated car

tridge seat valve (series EEX-W1.B…) that is fit

ted. See “Related data sheets”.

ATTENTION!

The performance figures in the data sheet for the

cartridge valve refer just to the cartridge itself.

Take into account the additional pressure drop in

the body into which it is fitted.

p = f (Q) Pressure drop - Flow rate characteristic

through orifice (metering function)

P0467.ai

50 (700)

100 (1400)

150 (2100)

200 (2900)

250 (3600)

315 (4500)

Q [l/min (gpm)]

20151050

p [bar (psi)]

(5.3)(4)(2.6)(1.3)

Ø 1.2

Ø 1.0

Ø 1.4

 1.2 and  1.4 orifices drilled out by customer!

p = f (Q) Pressure drop - Flow rate characteristic

through push-in check valve

P0466.ai

2 (30)

4 (60)

6 (90)

8 (115)

10 (140)

Q [l/min (gpm)]

20151050

p [bar (psi)]

(5.3)(4)(2.6)(1.3)

400-P-115210-EN-02/02.2018

Series EEX-W2N…

4/7

22 S22 O

PA T

32 S32 O33 R43 F43 G43 A

PA T

PA TB

a b

Code Symbols Remarks Operating principle

2-way circuit

(with 2/2 cartridge seat valve)

3-way circuit

(with 3/2 cartridge seat valve)

3-way circuit

(with 2/2 cartridges)

4-way circuit

(with 3/2 cartridge seat valves)

For 2/2 circuits, the customer

must plug the T port!

For 2/2 circuits, the customer

must plug the P port!

For 2/2 circuits, the customer

must plug the T port!

For 2/2 circuits, the customer

must plug the T port!

Unacceptable heating-up

Energising solenoids a and b

simultaneously is not permitted!

Unacceptable heating-up

Energising solenoids a and b

simultaneously is not permitted!

Unacceptable heating-up

Energising solenoids a and b

simultaneously is not permitted!

Unacceptable heating-up

Energising solenoids a and b

simultaneously is not permitted!

400-P-115210-EN-02/02.2018

Series EEX-W2N…

5/7

4 Dimensions & sectional view

2/2 and 3/2 solenoid operated directional seat valve (single-solenoid model)

93.3

(3.67)

2.4

(0.09)

163.3

(6.43)

(0.89)

(1.86)

18.4

(0.72)

(2.76)

(1.81)

13.7

(0.54)

171.4

(6.75)

4 4

= 5,2 [Nm]  5 % M

= 5,2 [Nm]  5 %

= 15 [Nm]  10 %

0,01 / 100

Rz max 4

(4 ft−lbs 5 %) (4 ft−lbs 5 %)

(11 ft−bls 10 %)

(0.3)

(1.77)

3/3 and 4/3 solenoid operated directional seat valve (double-solenoid model)

400-P-115210-EN-02/02.2018

Series EEX-W2N…

6/7

Seal kit no. DS-475-N

Item Qty. Description

1 4 O-ring no. 012 9,25x1,78 N90

2 2 NBR seal kit no. DS-263-N for seat valve,

type EEX-W1...

IMPORTANT!

Can be chosen with or without manual

override. (see ordering code)

Valve mounting bolts M5x30

(included in the delivery)

Seal kit with Viton seals, no. DS-475-V

Required surface finish on the

mounting face (valve pad)

4.1 Push-in check valve

To prevent uncontrolled back-pressure effects or back-flow

of oil, series EEX-W2N… solenoid operated directional seat

valves can be supplied with an optional push-in check

valve, type RCA-5, and a special body. The check valve al

lows free flow from P to A or B, but prevents flow in the oppo

site direction, with no leakage.

Application: when several valves are supplied in parallel, for

instance, and the supply pressure in P drops below the

pressure in A or B (another circuit is vented, or a lightly-

loaded actuator is operated). The pressure in service line A

or B is then higher, but the check valve prevents it from fal

ling during such operations in other circuits.

4.2 Orifice (metering function)

An orifice disc (type D10,  1.0 mm) must be used when, as

a consequence of the operating conditions that exist, circuit

operations may result in flow rates that exceed the perform

ance limit of the valve.

IMPORTANT!

The orifice disc fitted for this purpose is  1.0 mm.

Customers may drill it out to  1.4 mm maximum

(see performance graphs).

Application: when used for charging accumulators, for in

stance, or when the solenoid operated directional seat

valves are used to pilot other valves.

5 Installation information

COMMISSIONING

S For short-circuit protection, each solenoid must be pre

ceded by a fuse conforming to B588 or IEC269 with a

maximum rating of 2 A (AC) or 6 A (DC).

S The solenoid coils must only be operated when they are

fitted on the associated valve. For more information on in

stallation and commissioning, please refer to the operat

ing instructions supplied with the solenoid coil.

ATTENTION!

Ratings given in the operating instructions

Pay attention to the relevant operating instruc

tions! If in doubt, the ratings in the operating in

structions apply.

ATTENTION!

Only qualified personnel with mechanical skills

may carry out any maintenance work. Generally,

the only work that should ever be undertaken is to

check, and possibly replace, the seals. When

changing seals, oil or grease the new seals tho

roughly before fitting them.

ATTENTION!

Authorised persons

The tasks described here may only be carried out

by authorised personnel. Authorised personnel

are those who have electro-technical training (EN

60204-1).

IMPORTANT!

When fitting the cartridges, use the specified tight

ening torque for the mounting bolts. The marking

"Valve End" on the adapter sleeve must be

mounted towards the valve flange! No adjust

ments are necessary, since the cartridges are set

in the factory.

IMPORTANT!

Minimum dimensions of the mating body

101 x 46 x 43 mm