Bosch Rexroth | 4WRZ16E100-7X6EG24N9ETK4D3M
4WRZ16E100-7X/6EG24N9ETK4/D3M
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The 4WRZ16E100-7X/6EG24N9ETK4/D3M valve belongs to the WRZ Proportional Directional Valves series from Bosch Rexroth and is intended to meter flow and direct pressure-compensated oil in hydraulic automation circuits. With a nominal size of 16, the main stage is proportioned for installations that require 100 l/min at a 10 bar pressure drop, allowing predictable actuator speed. The main channel tolerates continuous operating pressures up to 350 bar, while the internal return port is limited to 30 bar so back pressure stays within spool bearing limits. Both pilot oil supply and pilot oil drain are internal, which removes the need for external pilot lines and simplifies manifold layout around the ISO 4401-07-06-0-94 mounting pattern. A pilot valve in size 6 modulates the main spool and is energized from a 24 V DC source to match common machine control voltages. Mineral oil of grades HL or HLP is specified as the working fluid, ensuring compatibility with standard plant lubrication stocks.
Cleanliness requirements call for 20/18/15 per ISO 4406 in the main gallery and 18/16/13 in the pilot circuit, levels that protect the precision metering edges from abrasive wear. Electrical contact is made through an EN 175301-803 plug, providing a sealed yet serviceable interface to the cabinet harness. A concealed manual override, coded N9, lets maintenance personnel shift the pilot spool locally while keeping the exterior free of protrusions during normal service. The built-in pressure reducing valve, type ZDR 6 DP0-4X/40YM-W80, stabilizes pilot pressure so that proportional control remains linear across the operating range. A throttle insert with a 2.0 mm diameter further damps pressure surges entering the pilot stage. Together, these features ensure consistent response while keeping the valve compact and aligned with the flow and pressure limits stated earlier.
Technical Specifications
Cleanliness Class (main)
20/18/15 (ISO 4406)
Cleanliness Class (pilot)
18/16/13 (ISO 4406)
Electrical Connection
EN 175301-803 Plug
Hydraulic Fluid
Mineral Oil (HL, HLP)
Manual Override
Concealed (N9)
Max Operating Pressure (main)
350 bar
Max Return Port Pressure (internal)
30 bar
Nominal Flow (Δp 10 Bar)
100 l/min
Nominal Size
16
Pilot Oil Drain
Internal
Pilot Oil Supply
Internal
Pilot Valve Size
6
Porting Pattern
ISO 4401-07-06-0-94
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Supply Voltage
24 V DC
Throttle Insert Diameter
2.0 mm
1620 Old Apex Road
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