Bosch Rexroth | 4WRZE16W8-150-7X6EG24ETK31A1D3M
4WRZE16W8-150-7X/6EG24ETK31/A1D3M
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The 4WRZE16W8-150-7X/6EG24ETK31/A1D3M proportional directional valve belongs to Bosch Rexroth’s WRZ Proportional Directional Valves series and is intended to meter flow in hydraulic automation systems. It accepts a ±10 V command signal so drive electronics can vary spool position proportionally to the control voltage. A 24 V DC supply powers the integrated electronics to maintain consistent actuation. The valve provides a nominal flow of 150 l/min at a 10 bar differential, giving adequate throughput for medium-size actuator circuits. A maximum main pressure rating of 350 bar allows operation in high-pressure manifolds. Internal pilot oil supply simplifies installation because no external feed line is required, and the internal pilot oil drain returns fluid without extra plumbing. Hysteresis remains at or below 6 percent which helps repeatability during directional changes. A pilot valve size of 6 is used to control the main stage with minimal pilot flow requirement.
The unit mounts on an ISO 4401-07-06-0-94 interface so it fits directly onto standardized subplates and stacks. Electrical connection is through a DIN EN 175201-804 plug, enabling straightforward wiring in control cabinets. Mineral oil of the HL or HLP classes serves as the hydraulic medium, supporting widespread fluid compatibility. The port T path tolerates up to 30 bar when using the internal drain, which protects the housing against back-pressure spikes. An adjustable ramp time up to 2.5 seconds lets the user soften acceleration and deceleration of actuators. The integrated pressure reducing valve identified as ZDR 6 DP0-4X/40YM-W80 stabilizes pilot supply pressure during load fluctuations. NBR sealing keeps leakage low while resisting mineral oil swelling. The assembly weighs 13.6 kg, a consideration for manifold support and service handling.
Technical Specifications
Command Signal Input
±10 V
Electrical Connector
DIN EN 175201-804
Hydraulic Fluid
Mineral Oil (HL, HLP)
Hysteresis
≤ 6%
Max Operating Pressure (main)
350 bar
Max Port T Pressure (internal Drain)
30 bar
Mounting Interface
ISO 4401-07-06-0-94
Nominal Flow @ Δp 10 Bar
150 l/min
Pilot Oil Drain
Internal
Pilot Oil Supply
Internal
Pilot Valve Size
6
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Ramp Time Max (adjustable)
2.5 s
Seal Material
NBR (M)
Supply Voltage
24 V DC
Weight
13.6 kg
1620 Old Apex Road
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