Bosch Rexroth | Z4WE6E68-31EW110K40MAG24
Z4WE6E68-31/EW110K40MAG24
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The Z4WE6E68-31/EW110K40MAG24 valve is produced by Bosch Rexroth in the WE Directional Spool Valves series. It directs oil flow in hydraulic automation circuits where electrical actuation is preferred. The unit is classified as size 6, which defines the flow paths and mounting envelope. A wet-pin solenoid with a detachable coil drives the spool so service personnel can replace the coil without opening the hydraulic section. The coil accepts 110 V AC at 50 or 60 Hz; during 50 Hz operation the current is 0.52 A, while 60 Hz operation draws 0.39 A. Switch-off transients are limited to 500 V, protecting upstream controls. The valve can be installed in any orientation, useful for compact manifolds. It mates to subplates that follow the ISO 4401-03-02-0-05 pattern and the equivalent NFPA T3.5.1 D03 interface, allowing interchange with common industrial bases.
Hydraulic performance is set for a maximum operating pressure of 350 bar on ports A, B, and P, supporting high-pressure machine tools and presses. The rated flow of 60 l/min permits moderate circuit speeds without excessive pressure drop. The fluid must maintain cleanliness to ISO 4406 code 20/18/15 to sustain spool clearance and reduce wear. A manual override tolerates tank pressures up to 50 bar so maintenance staff can shift the spool during commissioning. Mounting uses four M5 × 50 screws that clamp across 42 mm; each fastener must be tightened to 7 Nm to achieve reliable seal compression. The mean time to dangerous failure is calculated at 300 years, demonstrating high functional safety for long-life installations. These characteristics combine to give dependable directional control where quick electrical actuation and straightforward service procedures are required.
Technical Specifications
Coil Voltage
110 V AC (50/60 Hz)
Fluid Cleanliness Class
ISO 4406 20/18/15
Installation Position
Any
Manual Override Max Tank Pressure
50 bar
Max Flow (ac)
60 l/min
Max Operating Pressure (a/b/p)
350 bar
Max Switch-off Overvoltage
500 V
Mounting Screw Size
M5 x 50 (Clamping 42 mm)
Mounting Screw Torque
7 Nm
Mttfd
300 years
Porting Pattern (iso)
ISO 4401-03-02-0-05
Porting Pattern (nfpa)
NFPA T3.5.1 D03
Rated Coil Current (50 Hz)
0.52 A
Rated Coil Current (60 Hz)
0.39 A
Solenoid Type
Wet-Pin With Detachable Coil
Valve Size
6
1620 Old Apex Road
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