Bosch Rexroth | Z4WE6E68-30EG96NK4
Z4WE6E68-30/EG96NK4
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The Z4WE6E68-30/EG96NK4 directional spool valve is produced by Bosch Rexroth within the WE Directional Spool Valves series to shift hydraulic flow between actuator ports. It mounts on subplates that follow the ISO 4401-03-02-0-05 porting pattern, allowing quick exchange in standardized manifolds. During direct-current operation the valve passes up to 80 l/min, and ports a, b, and p can be pressurized to 350 bar while the tank port t is limited to 210 bar, making it suitable for high-pressure circuits. The solenoid is wound for 96 V DC and accepts a ±10 % supply variation, drawing 0.33 A and 30 W so control cabinets can use compact power supplies. These electrical ratings support a rated switching frequency of 4.2 cycles per second for responsive actuation.
The hydraulic fluid must meet ISO 4406 20/18/15 cleanliness to preserve spool metering edges and maintain service life. A 100 % S1 duty cycle lets the coil remain continuously energized without forced cooling, though designers should note that its surface temperature can reach 120 °C under worst-case load. The electrical interface is a DIN EN 175301-803 K4 connector that provides an IP65 enclosure rating when properly sealed, preventing dust ingress and water jets in typical plant environments. Functional safety calculations are aided by an MTTFd value of 300 years, indicating very low probability of dangerous failure over time. Together these parameters define a valve suited to repetitive, long-term service in automated hydraulic machinery.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Coil Rated Voltage
96 V DC
Duty Cycle
100% (S1)
Electrical Connection
DIN EN 175301-803 (K4)
Max Coil Surface Temperature
120 °C
Maximum Flow (dc)
80 l/min
Maximum Operating Pressure (a/b/p)
350 bar
Maximum Tank Port Pressure (t)
210 bar
Mttfd
300 years
Nominal Power (dc Coil)
30 W
Porting Pattern
ISO 4401-03-02-0-05
Protection Class
IP65 (K4)
Rated Coil Current
0.33 A
Switching Frequency (dc)
4.2 1/s
Voltage Tolerance
±10%
1620 Old Apex Road
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