Bosch Rexroth | Z4WE68-30EGZ4K4
Z4WE68-30/EGZ4K4
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The Z4WE68-30/EGZ4K4 valve is manufactured by Bosch Rexroth as part of the WE Directional Spool Valves series and directs hydraulic flow in automated machinery. It is built in size 6, matching D03 mounting footprints, while the porting pattern ISO 4401-03-02-0-05 allows direct stacking on standard manifolds. Compliance with NFPA T3.5.1 R2-2002 D03 keeps drilling layouts consistent across equipment. The hydraulic section withstands 350 bar on ports A, B, and P, and port T tolerates 210 bar back-pressure without functional loss. Flow capacity reaches 80 l/min so actuators receive adequate oil volume. Internal parts require oil cleanliness of ISO 4406 20/18/15 to limit abrasion. A calculated MTTFd of 300 years contributes to high reliability targets in safety-related control systems.
The solenoid assembly actuates the spool when a control signal is applied. Its coil consumes 30 W at the rated 24 V DC supply and draws 1.25 A under steady conditions. A voltage tolerance of ±10 % permits operation during typical supply deviations, and a duty cycle of 100 % ED supports continuous energization in holding circuits. The insulation system accepts a maximum coil surface temperature of 120 °C before derating is required. Electrical connection is handled by a K4 plug conforming to DIN EN 175301-803, making field wiring quick. When the mating connector is fastened, the assembly achieves IP65 ingress protection, resisting dust and water spray encountered in production areas.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Coil Nominal Power (dc)
30 W
Connector Type
K4 (DIN EN 175301-803)
Duty Cycle
100% ED
Ingress Protection (k4)
IP65
Interface Standard
NFPA T3.5.1 R2-2002 D03
Max Coil Surface Temperature
120 °C
Max Flow (dc)
80 l/min
Max Operating Pressure (a, B, P)
350 bar
Max Port T Pressure (dc)
210 bar
Mttfd
300 years
Porting Pattern
ISO 4401-03-02-0-05
Rated Current (24 V Dc)
1.25 A
Rated Voltage (dc)
24 V
Size
6
Voltage Tolerance
±10%
1620 Old Apex Road
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