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The 4WRZE16W8-150-7X/6EG24EK31/A1V proportional directional valve is manufactured by Bosch Rexroth for the WRZ Proportional Directional Valves series and serves to meter flow and direct pressure in hydraulic automation circuits. It bolts to an ISO 4401-07-06-0-94 mounting surface, integrating directly with standardized subplates or manifolds. A nominal flow of 150 l/min at a 10 bar differential supports rapid actuator movement, while the main ports withstand operating pressures up to 350 bar for high-force applications. Return flow at port T can rise to 250 bar without damaging the assembly, and the separate pilot drain line tolerates 30 bar to protect control accuracy. Pilot oil is supplied internally, but drained externally to keep spool positioning independent of tank pressure. These hydraulic limits are carried in a housing that weighs 13.6 kg, enabling rigid mounting without excessive structural load.
The electromagnetic section is powered by a 24 V DC supply and responds to a ±10 V command signal, allowing proportional spool travel driven by the machine controller. A coil resistance of 2 Ω at 20 °C defines current draw, and the design supports a 100 % duty cycle so continuous energization does not require rest periods. Windings may reach 150 °C before thermal limits are met, matching heavy production cycles. Connection is made through a DIN EN 175201-804 plug, and the assembled solenoid achieves an IP65 protection class to resist dust and low-pressure water jets. FKM seals are fitted to guard against high-temperature hydraulic oils and aggressive additives, keeping internal leakage low throughout extended service.
Coil Resistance
2 Ω (20 °C)
Command Signal
±10 V (A1)
Duty Cycle
100%
Electrical Connection
DIN EN 175201-804
Max Coil Temperature
150 °C
Max Operating Pressure (main)
350 bar
Max Pilot Drain Pressure (y)
30 bar
Max Return Pressure (port T)
250 bar
Mounting Interface
ISO 4401-07-06-0-94
Nominal Flow
150 l/min (Δp 10 bar)
Pilot Oil Drain
External
Pilot Oil Supply
Internal
Protection Class
IP65
Seals
FKM
Supply Voltage
24 VDC
Weight
13.6 kg
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