Bosch Rexroth | 4WRKE25W8-220L-3X6EG24TK31A1D3M
4WRKE25W8-220L-3X/6EG24TK31/A1D3M
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The 4WRKE25W8-220L-3X/6EG24TK31/A1D3M directional valve belongs to the 4WRKE Directional Valves series and is manufactured by Bosch Rexroth for closed-loop hydraulic automation where accurate flow modulation is required. Its W8 spool type defines the metering lands so that flow passages open in a predictable manner, and the linear characteristic curve keeps the output directly proportional to spool displacement. A nominal flow of 220 L/min at a 10 bar pressure drop sets the reference capacity for sizing actuators. The ±10 V command/actual signal enables analog feedback control from servo electronics, while a 24 VDC supply voltage powers the on-board amplifiers. A 6E removable-coil solenoid eases replacement during maintenance, and the electrical section draws up to 1.5 A with a maximum consumption of 72 W.
High-pressure operation is supported by a 350 bar rating on ports p, a, and b, letting the valve work in demanding power units. The assembly can pass up to 870 L/min, enabling large cylinder or motor circuits to cycle quickly. External pilot oil supply keeps control pressure stable, and internal pilot oil drain returns pilot flow without an additional drain line. The ISO 4401-08-07-0-94 porting pattern aligns with common subplates, simplifying manifold design. An IP65 protection class shields the electronics against dust ingress and low-pressure water jets, and NBR seals preserve sealing integrity with standard hydraulic oils. A mass of 16.8 kg defines the mounting load for the manifold or machine frame.
Technical Specifications
Characteristic Curve Form
Linear (L)
Command/actual Signal
±10 V
Max Operating Pressure (p,a,b)
350 bar
Max Permissible Flow
870 L/min
Max Power
72 W
Max Supply Current
1.5 A
Nominal Flow (Δp=10 Bar)
220 L/min
Pilot Oil Drain
Internal
Pilot Oil Supply
External
Porting Pattern
ISO 4401-08-07-0-94
Protection Class
IP65
Seals
NBR
Solenoid Type
6E (Removable Coil)
Spool Type
W8
Supply Voltage
24 VDC
Weight
16.8 kg
1620 Old Apex Road
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