Bosch Rexroth | Z4WE6E68-21AG24NK1
Z4WE6E68-21/AG24NK1
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The Z4WE6E68-21/AG24NK1 valve is produced by Bosch Rexroth for the WE Directional Spool Valves series and is intended to shift hydraulic flow paths in automated machinery. With a nominal size of 6, it fits compact subplates while maintaining adequate flow area. An ISO 4401-03-02-0-05 porting pattern and the equivalent NFPA T3.5.1 R2-2002 D03 layout align the body with widely used manifold blocks, simplifying installation. The solenoid is designed for a 24 V DC supply, and a voltage tolerance of ±10 % keeps the coil active during minor supply variations. Electrical load remains moderate because the nominal power is 30 W. A continuous duty cycle of 100 % (S1) allows the solenoid to stay energized without scheduled cooldowns, and insulation class F prevents winding degradation under elevated temperatures. The maximum coil surface temperature is limited to 120 °C, protecting adjacent components and sealing materials.
For hydraulic performance, the valve carries a maximum operating pressure of 350 bar at ports a, b, and p, while the tank port tolerates up to 210 bar, enabling use in high-pressure circuits. Peak flow reaches 80 l/min so actuators can move at practical speeds without excessive loss. Dynamic tasks are governed by a maximum switching frequency of 4.2 actuations per second, and a permitted switch-off overvoltage of 500 V safeguards the coil against inductive spikes when de-energized. Proper system cleanliness must achieve ISO 4406 class 20/18/15 to avoid spool sticking and wear. The valve can be mounted in any installation position, giving designers freedom when routing piping and placing manifolds. These functional limits combine to support reliable direction control across continuous duty cycles in production equipment.
Technical Specifications
Coil Voltage
24 V DC
Duty Cycle
100% (S1)
Fluid Cleanliness Class
ISO 4406 20/18/15
Installation Position
Any
Insulation Class (dc)
F
Max Coil Surface Temp
120 °C
Max Flow (dc)
80 l/min
Max Operating Pressure (a/b/p)
350 bar
Max Switch-off Overvoltage
500 V
Max Switching Frequency (dc)
4.2 1/s
Max Tank Port Pressure (t, Dc)
210 bar
Nominal Power (dc)
30 W
Nominal Size
6
Porting Pattern (iso)
ISO 4401-03-02-0-05
Porting Pattern (nfpa)
T3.5.1 R2-2002 D03
Voltage Tolerance
±10%
1620 Old Apex Road
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