Bosch Rexroth | 4WRZ16W6-100-7X6EG24N9K4M
4WRZ16W6-100-7X/6EG24N9K4/M
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The 4WRZ16W6-100-7X/6EG24N9K4/M proportional directional valve belongs to the WRZ Proportional Directional Valves series and is produced by Bosch Rexroth. It directs and meters hydraulic flow in automated machinery. The valve bolts to manifolds via the ISO 4401-07-06-0-94 interface, simplifying service swaps. A nominal flow of 100 l/min at a 10 bar pressure differential defines the throughput available to cylinders or motors. Operating pressures reach 350 bar, allowing installation in high-pressure circuits. All working ports (a, b, p, and t) share a 20 mm diameter so flow paths remain balanced. Mineral oil of the HL or HLP grade is the specified medium to protect seals and maintain viscosity. A 15 percent command value overlap stabilizes the neutral position and prevents unintended movement. The solenoid is energized by a 24 V DC supply, and a 100 percent duty cycle permits continuous modulation without cooling pauses.
The main stage demands oil cleanliness to ISO 4406 20/18/15, while the pilot stage tightens the limit to ISO 4406 18/16/13 to prevent spool sticking. Coil resistance is 4.8 Ω at 20 °C, enabling precise current control by the driver electronics. Together the resistance and the 1.5 A current limit define the magnetic force available to shift the spool. The coil connection follows DIN EN 175301-803, giving a common industrial plug layout. Winding insulation tolerates temperatures up to 150 °C, preventing damage during continuous service. An IP65 enclosure rating shields the electrical parts from dust ingress and low-pressure water jets, so the unit can operate near fluid spray zones. Installed mass is 13.4 kg, so manifold supports must accommodate this load without distortion. The protection level and standard plug also simplify maintenance in wash-down areas.
Technical Specifications
Cleanliness Class (main)
ISO 4406 20/18/15
Cleanliness Class (pilot)
ISO 4406 18/16/13
Coil Resistance (20 °c)
4.8 Ω
Command Value Overlap
15%
Duty Cycle
100%
Electrical Connection
DIN EN 175301-803
Hydraulic Fluid
Mineral Oil (HL, HLP)
Ip Rating
IP65
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure
350 bar
Mounting Interface
ISO 4401-07-06-0-94
Nominal Flow (Δp=10 Bar)
100 l/min
Port Diameter (a/b/p/t)
20 mm
Supply Voltage
24 V DC
Weight
13.4 kg
1620 Old Apex Road
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