Bosch Rexroth | 4WRZ16E150-7XETM
4WRZ16E150-7X/ET/M
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The 4WRZ16E150-7X/ET/M proportional directional valve belongs to the WRZ Proportional Directional Valves series from Bosch Rexroth and is used to meter flow and shift actuator direction in hydraulic automation systems. It provides a nominal flow of 150 l/min when the pressure drop across the main stage is 10 bar, enabling medium-capacity circuits to operate with controlled velocity. A maximum operating pressure of 350 bar on the main ports allows the spool to handle high-pressure supplies typical of industrial presses and injection machinery. Both pilot oil supply and drain are internal, so no external pilot lines are required; the pilot stage draws up to 5.5 l/min and displaces 4.6 cm³ during a full 0–100 % command, contributing to quick spool positioning. The housing follows the ISO 4401-07-06-0-94 mounting pattern for direct subplate assembly, and NBR seals are fitted to contain mineral hydraulic oil. With a subplate-mounted weight of 13.4 kg, the valve demands rigid manifold support.
Electronic control characteristics show a 15 % command value overlap that establishes a defined neutral zone, while hysteresis is kept at or below 6 % to maintain repeatable spool positioning. The solenoid circuit is energized with direct current; a 4.8 Ω coil resistance at 20 °C and a maximum drive current of 1.5 A determine the power stage sizing in the amplifier. Electrical connection is made through a DIN EN 175301-803 plug, allowing rapid replacement without rewiring. The enclosure satisfies IP65, protecting internal components from dust ingress and low-pressure water jets in harsh factory environments. Return-line limitations are addressed by a maximum port T pressure of 30 bar for the internal drain path, so back-pressure within the tank line must stay below this value to avoid pilot stage interference. These specifications coordinate to deliver stable proportional flow control when integrated into closed-loop servo hydraulics.
Technical Specifications
Command Value Overlap
15%
Electrical Connection
DIN EN 175301-803
Hysteresis
≤ 6%
Max Current
1.5 A
Max Operating Pressure (main)
350 bar
Max Port T Pressure (int. Drain)
30 bar
Mounting Pattern
ISO 4401-07-06-0-94
Nominal Flow (Δp=10 Bar)
150 l/min
Pilot Oil Flow (0→100%)
5.5 l/min
Pilot Oil Supply/drain
Internal/Internal
Pilot Oil Volume (0→100%)
4.6 cm3
Protection Class
IP65
Seal Material
NBR
Solenoid Resistance (20 °c)
4.8 Ω
Voltage Type
DC
Weight (subplate Mounting)
13.4 kg
1620 Old Apex Road
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