Bosch Rexroth | 4WRZ16E150-7X6EG24N9K4M
4WRZ16E150-7X/6EG24N9K4/M
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The 4WRZ16E150-7X/6EG24N9K4/M valve is produced by Bosch Rexroth and belongs to the WRZ Proportional Directional Valves series. It directs hydraulic flow in automation circuits where variable position control is required. The main stage withstands 350 bar, allowing use in high-pressure power units, while a nominal flow of 150 l/min at a 10-bar differential delivers adequate volume for medium actuators. Hysteresis is held at or below 6 percent so cylinder positions can be repeated with limited deviation. A detachable size-6E coil, driven by 24 V DC, simplifies replacement and matches common machine voltages. Wiring is handled through a DIN EN 175301-803 connector, giving a standardized plug interface. A concealed N9 manual override lets maintenance staff shift the spool mechanically yet protects against accidental actuation. The unit fits subplates drilled to ISO 4401-07-06-0-94 and weighs 13.4 kg, providing rigid mounting without extra brackets.
The hydraulic medium must meet an ISO 4406 cleanliness level of 20/18/15 for the main path and 18/16/13 for the pilot path to minimize edge wear. During command changes from zero to full stroke, the pilot stage draws 5.5 l/min and displaces 4.6 cm³, values that govern response time and limit heat in the control circuit. The drain line at port Y can be pressurized to 30 bar, and the external return port T tolerates 250 bar, permitting connection to pressurized tank circuits without spool drift. NBR seals are installed to retain fluid and handle standard mineral oils used in industrial hydraulics. These cleanliness limits, pilot consumption figures, and pressure ratings support consistent spool positioning in closed-loop servo systems.
Technical Specifications
Cleanliness Class (main Valve)
20/18/15 (ISO 4406)
Cleanliness Class (pilot Valve)
18/16/13 (ISO 4406)
Electrical Connection
DIN EN 175301-803
Hysteresis
≤ 6%
Manual Override
Concealed (N9)
Max Operating Pressure (main)
350 bar
Mounting Pattern
ISO 4401-07-06-0-94
Nominal Flow (dp=10 Bar)
150 l/min
Pilot Oil Flow (step 0-100%)
5.5 l/min
Pilot Oil Volume (step 0-100%)
4.6 cm3
Port Y Pressure (drain)
30 bar
Return Port T Pressure (external)
250 bar
Seals
NBR (M)
Solenoid Type
Detachable Coil (Size 6E)
Supply Voltage
24 V DC
Weight (subplate Mounting)
13.4 kg
1620 Old Apex Road
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