Bosch Rexroth | 4WRZ16W8-100-7X6EG24N9ETK4D3V
4WRZ16W8-100-7X/6EG24N9ETK4/D3V
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The 4WRZ16W8-100-7X/6EG24N9ETK4/D3V valve is produced by Bosch Rexroth in the WRZ Proportional Directional Valves series and meters hydraulic flow for automation systems that need variable spool positioning. A nominal flow of 100 l/min at a 10 bar pressure drop supports medium-flow circuits, while the main stage tolerates up to 350 bar to suit high-pressure manifolds. Its solenoid coil is energized with 24 V DC for compatibility with common machine power supplies, and wiring is simplified by a DIN EN 175301-803 connector. Continuous service is possible because the rated duty cycle is 100%. FKM seals resist common hydraulic media and elevated temperatures, and a concealed manual override allows spool positioning without electrical power during commissioning. When mounted on a subplate the assembly weighs 13.4 kg, which affects handling during installation.
The pilot supply and drain are both internal, eliminating the need for external pilot lines, and a transition from zero to full stroke demands 5.5 l/min of pilot oil so the control system must reserve that flow. A ZDR 6 DP0-4X/40YM-W80 pressure reducing valve is integrated to stabilize the pilot pressure. Cleanliness of the main stage oil should meet ISO 4406 class 20/18/15 to maintain proportional accuracy, whereas the pilot stage requires cleaner fluid at class 18/16/13 for reliable solenoid actuation. Back-pressure limits are 250 bar on the external return port and 30 bar on the internal path to protect seals and centering springs. Port Y is restricted to 30 bar, preventing overload of the drain gallery.
Technical Specifications
Cleanliness Class (main Valve)
20/18/15 (ISO 4406)
Cleanliness Class (pilot Valve)
18/16/13 (ISO 4406)
Duty Cycle
100%
Electrical Connector
DIN EN 175301-803
Manual Override
Concealed
Max Operating Pressure (main)
350 bar
Max Port Y Pressure
30 bar
Max Return Port Pressure (t, External)
250 bar
Max Return Port Pressure (t, Internal)
30 bar
Nominal Flow (dp=10 Bar)
100 l/min
Pilot Oil Flow (step 0 To 100%)
5.5 l/min
Pilot Supply/drain
Internal/Internal
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Seal Material
FKM
Solenoid Supply Voltage
24 V DC
Weight (subplate Mounting)
13.4 kg
1620 Old Apex Road
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