4/3, 4/2 and 3/2directional valve with wet-pin AC or DC solenoid
Type WE 6...L7X
Features
– Direct operated directional solenoid valve, standard version
– Porting pattern according to DIN 24 340 form A,ISO 4401 and
CETOP-RP 121 H
– Wet pin DC solenoids with detachable coil
– Pressure-tight chamber needs not to be opened for a coil change
Function and configurations
Directional valves of type WE are solenoid operated directional
spool valves. They control the start, stop and direction of a flow.
The directional control valves consist of housing (1), one or two
solenoids (2), the control spool (3), and one or two return springs
(4).
In the de-energized condition the control spool (3) is held in the
neutral or initial position by means of return springs (4) (except
for impulse spools).
The control spool (3) is actuated via wet pin solenoids (2).
To ensure proper operation, care must be taken that the pressure
chamber of the solenoid is filled with oil.
The control spool (3) is moved to the expected position by solenoid
(2) and pushing rod (5). This gives free-flow from P to A and B to
T or P to B and A to T.
When solenoid (2) is de-energized, the control spool (3) is
returned to its initial position by means of the return springs
(4).
The solenoids may also control the control spool (3) by an optional
override button (6) under the de-energized condition.
Type 4WE 6.. L7X/OF... (impulse spool, possible only for symbol D)
This version has 2 switched positions, 2 solenoids and a detent.
Both switched positions are thus fixed alternately and so it is
unnecessary to continually energize the solenoid.
Specifications
Symbols
Technical data
| Fixing position | Optional |
| Environment temperature range | ℃ | -30 to +50 (NBR seal) |
| -20 to +50 (FKM seal) |
| Weight | Single solenoid | kg | 1.25 |
| Double solenoids | kg | 1.6 |
| Max.operating pressure | Port A, B, P | bar | 315 |
| Port T | bar | 160, when the operating pressure exceed the permission value, port
T must be used as drain port for spool symbol A and B |
| Max. flow-rate | L/min | 60 |
| Fluid | Mineral oil suitable for NBR and FKM seal |
| Phosphate ester for FKM seal |
| Fluid temperature range | ℃ | -30 to +80 (NBR seal) |
| -20 to +80 (FKM seal) |
| Viscosity range | mm2/s | 2.8 to 500 |
| Degree of contamination | Maximum permissible degree of fluid contamination: Class 9. NAS
1638 or 20/18/15, ISO4406 |
Electric data
| Type of voltage | DC |
| Available voltages | V | 12,24 |
| Voltage tolerance (nominal voltage) | % | +10~ -10 |
| Input power | W | 26 |
| Duty | Continuous working |
| Switched time to ISO 6403 | ON | ms | 25 to 45 |
| OFF | ms | 10 to 25 |
| Maximum switching frequency | times/h | to 15000 |
| Type of protection to DIN 40050 | IP65 |
| Max. coils temperature | ℃ | 150 |
Caution: When connecting wires, properly connect the PE conductor.
Unit dimensions (Dimensions in mm)
1 Solenoid
2 Manual override button
3 Plug-in connector to DIN 43650
4 Nameplate
5 O-ring: 9.25×1.78
6 Plug screw for valves with one solenoid
7 Space required to remove connector
8 Space required to remove coil
9 Dimension of 3-position valves, standard version
10 Dimension of 2-position valves with solenoid at 'A', standard
version
11 Dimension of 2-position valves with solenoid at 'B', standard
version
12 Securing nut, tightening torque MA=4Nm
13 Valve fixing screws. Hexagon socket head cap screw, M5×50 GB/T
70.1-10.9, Tightening torque, MA=8.9Nm
It must be ordered separately, if connection plate is needed. Type: G341/01(G1/4), G341/02 (M14×1.5)
G342/01(G3/8), G342/02(M18×1.5)
G502/01(G1/2), G502/02(M22×1.5)
Notes: 4 hexagon socket head cap screws UNC 10-24 UNC×2"ASTM-A574 (
separate order )(Friction coefficient μtotal=0.19 to 0.24)；
Tightening torque MA=11Nm ［8.2ft-lbs］±15%
(Friction coefficient μtotal=0.12 to 0.17)；
Tightening torque MA=8Nm ［5.9ft-lbs］±10%
