Payment & Shipping Terms:
|Pressure:||350 Bar||Max. Flow:||80 L/min|
|Fluid Temperature Range:||-30 To +50 (NBR Seal)/-20 To +50 (FKM Seal) ℃|
hydraulic lever control valves,
hydraulic proportional control valve
4/3, 4/2 and 3/2 explosion-proof solenoid directional valve
-Directly operated type explosion protection directional valve is used as the standard type
-DIN24 340 A type on the mounting surface ISO 4401 and CETOP-RP 121H
-Wet-type DC explosion protection solenoid
-90° rotatable explosion protection solenoid
-Pressure-tight chamber does not need to be opened when coil is to be replaced
Function and configuration
GWE type directional control valve is the directional valve of explosion protection solenoid used to control start, stop and flow direction of oil fluid.
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 pulse spools). The control spool (3) is actuated via wet pin solenoids (2).
To guarantee satisfactory operation care should be taken to ensure that the solenoid pressure chamber is filled with oil.
The control spool(3) is moved to the expected position by solenoid(2) and pushing rod(5), and this gives free flow from P to A and B to T or P to B and A to T.
When the explosion protection solenoid(2) is powered off, control valve element (3) is pushed to the initial position by reset spring (4).
(limited to functions A, C and D).
This type contains 2 switching positions and 2 directional control valves without locating mechanism explosion protection solenoid.
Type G4WE6...L6X/OFB2... pulse valve
(limited to functions A, C and D).
It contains 2 switching positions, 2 explosion protection solenoids and 1 directional control valve with locating mechanism. 2 switching positions are fixed separately, so it is unnecessary to continuously electrify explosion protection solenoid.
The cartridge throttle is necessary since the actual flow may be larger than the performance limits of the valve during switching process. This cartridge throttle is inserted in the P channel of the directional control valve.
Note: G1 Explosion protection grade EX d Ⅰ Mb; G2 Explosion protection grade EX d Ⅱ C T4 Gb
|Environment temperature range||℃||-30 to +50 (NBR seal)|
|-20 to +50 (FKM seal)|
|Max.operating pressure||Port P, A, B||bar||350|
|when the operating pressure exceeds the permission value, spool symbol A and B must make the port T for draining|
|Flow cross section (switching neutral position )||VersionQ||mm2||About 6% of nominal area|
|VersionW||mm2||About 3% of nominal area|
|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|
|Type of voltage||DC|
|Available voltage||V||12, 24, 36, 110|
|Permissible voltage (deviation)||%||-15 to +10|
|Operation mode of solenoid||Continuous working|
|Switched time Accord with ISO 6403||ON||ms||25 to 45|
|OFF||ms||10 to 25|
|Switched frequency||times/h||To 15000|
|Max. coils temperature||℃||+150|
Caution: with electrical connections the protective conductor (PE) must be connected according to the relevant regulations.
Unit dimensions (Dimensions in mm)
1 Explosion protection solenoid
2 Copper nameplate
3 R-ring 9.81×1.5×1.78 or O-ring 9.25×1.78
4 End cap used for 1 electro solenoid valve
5 Dimensions of 3-position valve
6 Dimensions of 2-position valve, solenoids at end A
7 Dimensions of 2-position valve, solenoids at end B
8 Valve fixing screws:
Tightening torque, MA=8.9Nm must be ordered separately.
It must be ordered separately, if connection plate is needed .Type: