2025.04.04
hydraulic directional control valves
Hydraulic directional control valves for aluminum extrusion machine
Principle of operation
WE type directional control valve is operated by the solenoid to control flow direction and on-off the valve is mainly comprised of valve body (1) one or two solenoids (2) control spool (3) and one or two reset springs(4) When cutting off electricity the control spool(3) is on center or original position by reset spring (4) cexcept for pulse valve The control spool(3) is operated by wet solenoid(2)
To ensure for obtaining satisfied with operation, the pressure cavity of solenoid must be filled with oil. The force of solenoid(2) going through rod (5) is acting on control spool (3) it will push on required position while on static position. The oil freely flows from P to A, B, to T P to B or A to T When the solenoid (2) off the control spool(3) will be pushed on original position by reset spring(4) For selection of manual urgent operation (6) can control the spool (3) motion when the solenoid is off
4WE 6..6X/O...type (only limiting symbol A.C.D)
The type consists of two switching positions and two solenoids without positions directional control valve
4WE 6..6X/OF...(pulse valve, only limiting symbol A.C.D)
It consists of two switching position two solenoide and one positioner directional control valve Two switching positions are respectively fixed so the solenoid needn't requiring for long time woking
Insert throttling valve (4WE 6..6X/.../B..)
Because of especial working state when switching it may appear as exceeding function curve of allowance flow under this condition it needs to mount insert thnttling plug The plug is mounted on P port of directional control valve.
WE6 type 6x series wet solenoid operated directional valve NG 6 pressure up to 31.5 Mpa flowrate up to 80 L/min
Mounting position | Slective |
|||
The highest ambient temperature | t | °C | To 50 |
|
Weight | With one solenoid valve | m | kg | 1.45 |
With two solenoid valve | m | kg | 1.95 |
|
Max working pressure | Port A, B, P | P | MPa | 31.5 |
Port T | P | MPa | To 21(=); to 16(-) If working pressure exceeds allowance pressure for spool A and B of the valve port T must be as leakage port |
|
Max flow | qv | L/min | To 80(=); To 60(~) |
|
Flow area (switching position O ) | Spool Q | A | mm2 | About rated area 6% |
Spool W | A | mm2 | About rated area 3% |
|
Hydraulic oil 1) apply to perbunan seal viton seal 2) for use only viton seal | Mineral oil (HL,HLP) DIN51 524 1); Quick biologic dissolve oil according to VDMA 24 568; HETG (rape seed oil); HEPG(polyglycol); HEES(synthetic ester)2); Other oil as required |
|||
Oil temperature changing range | °C | -30 to +80(with perbunan seal) |
||
-20 to +80 (with viton seal) |
||||
Viscosity range | mm2/s | 2.8 to 500 |
||
Contaminant degree | The high contaminant class of oil is the ninth class of NAS 1638 recommend to use the oil filter with minimal filter fineness β10≥75 |
|||
Electricity data
Volt type | DC | AC |
||
Available volt | U | V | 12, 24, 42, 60, 96, 110, 180, 205,220 | 42, 110, 120, 220, 50/60Hz |
Allowed volt (allowance volt ) | % | ±10 | ||
Power requirement | P | W | 30 | - |
Power keep | P | VA | - | 50 |
Power impetus | P | VA | - | 220 |
Work repeating | 100% | 100% |
||
Time repeating press on | T | ms | 25 to 45 | 10 to 20 |
ISO 6403 off | T | ms | 10 to 25 | 15 to 40 |
Switching frequency | time/h | To 15000 | To 7200 |
|
Insulation degree according to DIN40050 | IP65 | IP65 |
||
Coil temperatare | °C | To +150 | To+180 |
|
It is correlative stipulated electric wire must be grounded | ||||
7 symbol "R"is on switching position A-B |
7 symbol "R"is on switching position A-B 8 symbol "G"and "T"is on center position P-T | Switching function limit (be measured when ν=41mm2 /s t=50°C) | Working limit for giving is useful for two direction flowing condition (as for P port flow to A of returning of B to T at the same time ) When single direction flow (if the port from P to A B is plugged )because of flow strenth in the valve allowance switching limit may fall cloun Working limit is measured when solenoid is on working temperature owing volt 10% and the reservoir without bearing pressure | DC solenoid Exemplification:G24:24V | AC solenoid Exemplification:W230:230V,5Hz | AC solenoid Exemplification:W230:230V,5Hz |
|||||||||||||||||||||
1.1 Solenoid "a"(grey plug-in connector) 1.2 Solenoid "b" (black plug-in connector) 2. Manual urgent operation 3.Size of solenoid "N"with manual urgent operation 4.Plug-in connector according to DIN43650 5.Name plate 6.O-ring 7. For use one plug of solenoid valve 8. Take off plug-in connector for space request 9. Take off coil for space request 10. Fixed screw nut tightened torque M =4Nm 11.Mounting surface according to DIN24 340, A type ISO 4401 and CETOP-RP 121 H bed plate G341/01(G1/4") G342/01(G3/8") G502/01(G1/2") Fixed screw of the valve M5X50 GB70-85-10.9 Tightened torque MA=8.9Nm |
External dimensions: valve with AC solenoid cooperated with surface fine machining requirement 1.Connection surface of the valve 2.Plate tangent 3.Fixed screw of the valve 4. Fixed screw of the valve four pieces M5X50 GB70-85-10.9 torque 9N.m |
Connection bed plate
Valve pictures:
Features:
Plug in type solenoid valve for easier to replace the weak coils.
All spools and bodies are interchangeable by retaining the same tolerance of internal leakage.
The wet type of solenoid valve, which is movable parts are immersed in the oil. It brings the feature of low noise.
High voltage test up to 1500v/min.
Insulation resistance test exceeds 100MΩ
The momentary signal shifting takes approx. 0.1 sec.
Spool shifting approx. 30,000,000 times
H class insulation coils which can resisted up to 180°C