Bosch Rexroth | 4WRZE16W8-150-7X6EG24N9ETK31A1D3V
4WRZE16W8-150-7X/6EG24N9ETK31/A1D3V
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The 4WRZE16W8-150-7X/6EG24N9ETK31/A1D3V proportional directional valve is produced by Bosch Rexroth for the WRZ Proportional Directional Valves series. It meters flow and directs pressure in hydraulic automation systems that require precise servo quality responses. A nominal flow rating of 150 l/min at a 10 bar pressure drop regulates cylinder or motor speed in medium-capacity circuits, while a maximum operating pressure of 350 bar allows the main stage to work in high-pressure installations. The porting pattern ISO 4401-07-06-0-94 lets the unit bolt to common subplates without machining changes. Control electronics accept a ±10 V command signal so analog controllers can generate proportional shifts. The on-board electronics run from a 24 V DC supply and draw 1.8 A, figures that guide power-supply sizing and fuse selection. Wiring is completed through a DIN EN 175201-804 K31 plug, and an IP65 housing resists dust and water spray in typical plant environments.
In the pilot stage a size 6 valve with a detachable coil speeds maintenance by letting technicians replace the solenoid without opening the hydraulic circuit. Internal pilot oil supply and drain reduce external piping, and the design withstands return-line pressures up to 30 bar on the internal drain port. The valve runs on mineral-based HL or HLP fluids defined in DIN 51524, and the permissible fluid temperature extends from −20 °C to 80 °C, accommodating cold starts and elevated operating heat. FKM seals retain elasticity over this temperature band and resist common hydraulic oils. System filtration must maintain cleanliness to ISO 4406 class 20/18/15 so the spool and lands remain free of abrasive wear. A concealed manual override lets personnel shift the valve during commissioning or power loss without disturbing the electrical input.
Technical Specifications
Cleanliness Class (main Valve)
ISO 4406 20/18/15
Command Value Input
±10 V (A1)
Current Consumption (obe)
1.8 A
Electrical Connection
DIN EN 175201-804 (K31)
Fluid Temperature Range
-20 to +80 °C
Hydraulic Fluid
HL, HLP (DIN 51524)
Manual Override
Concealed (N9)
Max Operating Pressure (main)
350 bar
Nominal Flow
150 l/min (Δp = 10 bar)
Pilot Oil Supply/drain
Internal (ET)
Pilot Valve Size
6 (Detachable Coil)
Porting Pattern
ISO 4401-07-06-0-94
Return Line Pressure (t)
30 bar (internal drain)
Seals
FKM (V)
Supply Voltage
24 V DC
Valve Protection
IP65
1620 Old Apex Road
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