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The 4WRZE25E1-220-7X/6EG24N9K31/A1V is produced by Bosch Rexroth for the WRZ Proportional Directional Valves series. It meters hydraulic flow and redirects pressure in closed-loop automation where precise motion control is required. The valve occupies nominal size 25, and its E1 spool geometry enables balanced flow in both directions. At a pressure drop of 10 bar it passes a nominal flow of 220 l/min, supporting high-speed actuator cycles. The main stage withstands operating pressure up to 350 bar, allowing placement on high-pressure supply manifolds. A ±10 V command input links the unit to analog controllers, while on-board electronics draw 24 VDC for internal regulation. Pilot control oil is supplied and drained externally, and the pilot section uses size 6 components to reduce response time and energy loss.
Electrical termination is handled through a DIN EN 175201-804 connector, providing a compact plug interface for power and signals. Static hysteresis is limited to 6 percent or less, so the spool tracks small command changes with minimal deviation. The on-board electronics offer a maximum ramp time of 2.5 seconds, permitting smooth acceleration of hydraulic loads. A concealed manual override lets service personnel shift the spool during setup without exposing moving parts. Port Y can tolerate 30 bar, and return port T can handle back pressure up to 250 bar, making the valve suitable for systems with downstream filters. FKM seals resist synthetic fluids and elevated temperatures, sustaining long service life. In subplate mounting the assembly weighs 18.4 kg, which influences manifold design and handling methods.
Command Value Input
±10 V
Electrical Connection
DIN EN 175201-804
Hysteresis
≤ 6%
Manual Override
Concealed
Max Operating Pressure (main)
350 bar
Max Port Y Pressure
30 bar
Max Return Pressure At Port T
250 bar
Nominal Flow (Δp=10 Bar)
220 l/min
Nominal Size
25
Obe Ramp Time (max)
2.5 s
Pilot Oil Supply/drain
External
Pilot Valve Size
6
Seal Material
FKM
Spool Symbol
E1
Supply Voltage
24 VDC
Weight (subplate Mounting)
18.4 kg
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