Bosch Rexroth | Z4WE6E68-20AG24N974
Z4WE6E68-20/AG24N974
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The Z4WE6E68-20/AG24N974 directional spool valve is produced by Bosch Rexroth within the WE Directional Spool Valves series. It directs hydraulic flow in automation circuits and mounts on subplates that follow porting pattern ISO 4401-03-02-0-05 to ensure interchangeability with standard manifolds. The valve tolerates operating pressures up to 350 bar at the P, A, and B ports, allowing it to handle high-pressure supply lines. A nominal flow capacity of 80 l/min supports medium-size actuators without excessive pressure drop. Continuous operation is possible because the solenoid is rated for a 100 % duty cycle. Electrical activation relies on a 24 V DC coil that draws a steady 1.25 A, so power supplies can be sized accordingly. The winding consumes 30 W under nominal conditions and accepts a voltage variation of ±10 %, guarding against minor network fluctuations.
Fluid cleanliness must meet ISO 4406 code 20/18/15 to prevent spool wear and sticking. The coil insulation is classified as F, enabling safe operation when winding temperatures rise during prolonged energization. A concealed N9 manual override permits local actuation while reducing the risk of accidental engagement; the override withstands 50 bar back-pressure to tank. Coil surface temperature can reach 120 °C, so surrounding components should be spaced to avoid heat transfer. Hydraulic fluid may be used between –20 °C and +80 °C, covering common mineral-oil operating ranges. Tank port pressure is limited to 210 bar, protecting return lines and reservoir seals. Overall, the specified cleanliness, temperature, and pressure limits ensure reliable service life when the valve is integrated into automated hydraulic machinery.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Duty Cycle
100% ED
Insulation Class (dc)
F
Manual Override
N9 (concealed)
Manual Override Max Tank Pressure
50 bar
Max Coil Surface Temperature
120 C
Max Flow (dc)
80 l/min
Max Fluid Temperature (nbr)
+80 C
Max Operating Pressure (p, A, B)
350 bar
Max Tank Port Pressure (t, Dc)
210 bar
Min Fluid Temperature (nbr)
−20 C
Nominal Power (dc)
30 W
Nominal Voltage
24 V DC
Porting Pattern
ISO 4401-03-02-0-05
Rated Current (24 V Dc)
1.25 A
Voltage Tolerance
±10%
1620 Old Apex Road
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