Bosch Rexroth | 4WRZE16W6-150-7X6EG24N9K31A1V
4WRZE16W6-150-7X/6EG24N9K31/A1V
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The 4WRZE16W6-150-7X/6EG24N9K31/A1V proportional directional valve belongs to the WRZ Proportional Directional Valves series and is produced by Bosch Rexroth for closed-loop hydraulic automation. It meters flow in both directions under electronic control to position actuators with precision. A ±10 V command signal modulates the pilot stage, while an internal power stage is supplied by 24 V DC. The main ports withstand 350 bar operating pressure, and the valve delivers 150 l/min at a 10 bar differential. Mounting follows the ISO 4401-07-06-0-94 pattern, and the external T port accepts return pressures up to 250 bar. Acceptable hydraulic media are HL or HLP mineral oils according to DIN 51524, provided the viscosity remains between 20 and 380 mm²/s and the fluid temperature stays from −20 °C to +80 °C.
System cleanliness must achieve ISO 4406 class 20/18/15 to limit contamination that could impair spool guidance. The housing carries an IP65 protection rating, sealing the electronics against dust ingress and low-pressure water jets. Electrical power and command lines are routed through a DIN EN 175201-804 connector, simplifying panel wiring and providing positive latching. Closed-loop accuracy is maintained because hysteresis is at or below 6 %, allowing predictable flow for small input changes. FKM seals tolerate elevated oil temperatures and resist mineral-oil swelling, extending service life. A concealed manual override is available so technicians can shift the spool during setup without energizing the coil, yet the override remains protected from accidental activation during operation.
Technical Specifications
Cleanliness (main)
ISO 4406 20/18/15
Command Signal
±10 V
Electrical Connector
DIN EN 175201-804
Fluid Temperature
-20 to +80 °C
Hydraulic Fluid
Mineral oil (HL, HLP) DIN 51524
Hysteresis
<= 6 %
Manual Override
Concealed
Max Operating Pressure (main)
350 bar
Nominal Flow (Δp 10 Bar)
150 l/min
Porting Pattern
ISO 4401-07-06-0-94
Return Pressure Port T (ext)
250 bar
Seal Material
FKM
Supply Voltage
24 V DC
Type Of Protection
IP65
Viscosity Range
20 to 380 mm2/s
1620 Old Apex Road
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