4WRZE25E1-325-7X/6EG24N9EK31/A1D3V

The 4WRZE25E1-325-7X/6EG24N9EK31/A1D3V proportional directional valve is produced by Bosch Rexroth for the WRZ Proportional Directional Valves series and modulates hydraulic flow in automated machinery. Valve size 25 defines the spool and body dimensions so the unit can handle large transmission passages. A nominal flow of 325 l/min at a 10 bar differential supports high-speed cylinder feeds in presses and die-casting equipment. The ±10 V command input signal permits proportional control from common motion controllers, translating voltage changes directly into spool displacement. The internal electronics draw 24 V DC, supplying consistent power to the pilot stage amplifier. Connection is made with a DIN EN 175201-804 K31 plug, giving standardized pin assignments for quick wiring. A maximum operating pressure of 350 bar allows the main stage to withstand heavy-duty circuit loads without fatigue. Subplate mounting makes replacement fast because the manifold remains fixed. The ISO 4401-08-07-0-94 porting pattern aligns the pressure, tank, and work ports with common industrial manifolds.

Pilot oil is taken internally from the pressure port, eliminating an extra supply line, while the drain is routed externally to prevent backpressure in the control stage. A pilot valve size 6 keeps the control assembly compact and limits actuation flow, improving response. The integrated pressure-reducing cartridge ZDR 6 DP0-4X/40YM-W80 stabilizes pilot pressure so the main spool tracks the command signal accurately. Return line pressures up to 250 bar can be accepted at port T, enabling operation with pressurized tank circuits. A concealed N9 manual override lets maintenance staff shift the spool mechanically during commissioning or power loss without exposing moving parts. FKM seals resist high temperatures and aggressive hydraulic media, extending service intervals. The assembly weighs 18.4 kg when mounted on a subplate, a figure that must be considered when sizing support brackets and handling equipment. These features provide predictable flow-direction control in closed-loop hydraulic automation systems running at elevated pressure and flow demands.