Bosch Rexroth | 4WRZE16W8-150-7X6EG24N9EK31A1D3V
4WRZE16W8-150-7X/6EG24N9EK31/A1D3V
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The 4WRZE16W8-150-7X/6EG24N9EK31/A1D3V belongs to the WRZ Proportional Directional Valves series from Bosch Rexroth and is intended to meter flow and change direction in closed-loop hydraulic automation. It accepts a 24 V DC supply voltage so the solenoids can be powered directly from standard control cabinets. A ±10 V command signal positions the spool proportionally, while a 15 percent command value overlap establishes a neutral zone that dampens small input noise. A 100 percent duty cycle lets the valve remain energized continuously without planned cooling pauses. The unit passes up to 150 l/min at a 10 bar pressure drop, supporting medium-to-high flow circuits, and withstands a main pressure of 350 bar to suit high-pressure systems. Installation is done through an ISO 4401-07-06-0-94 interface, allowing direct mounting on size 16 subplates, and each A, B, P, and T port is machined to 20 mm to accommodate the rated flow without excessive velocity.
The pilot stage can be supplied and drained internally or externally, noted by the E code, giving designers flexibility in circuit layout. Electrical connection is made with a DIN EN 175201-804 plug, providing a keyed, vibration-resistant interface for coil power. A concealed manual override identified as N9 lets technicians shift the spool during setup while preventing accidental use in service. Coil insulation tolerates temperatures up to 150 °C, safeguarding performance during prolonged operation near hot machinery. Port Y back pressure is limited to 30 bar so pilot drainage does not disturb control accuracy, whereas the tank port can handle return flow pressures up to 250 bar without affecting spool movement. FKM seals are fitted to resist high temperature and common hydraulic fluids, and the valve body weighs 13.6 kg, a consideration when selecting mounting hardware and support brackets.
Technical Specifications
Command Signal
±10 V
Command Value Overlap
15%
Duty Cycle
100%
Electrical Connection
DIN EN 175201-804
Manual Override
Concealed (N9)
Max Coil Temperature
150 °C
Max Operating Pressure (main)
350 bar
Max Port Y Pressure
30 bar
Max Return Flow Pressure (t)
250 bar
Mounting Interface
ISO 4401-07-06-0-94
Nominal Flow (Δp 10 Bar)
150 l/min
Pilot Supply/drain
Internal/External (E)
Port A/b/p/t Diameter
20 mm
Seal Material
FKM
Supply Voltage
24 V DC
Weight (subplate, Size 16)
13.6 kg
1620 Old Apex Road
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