Bosch Rexroth | 4WRZ16W6-150-7X6EG24N9ETK4D3M
4WRZ16W6-150-7X/6EG24N9ETK4/D3M
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The 4WRZ16W6-150-7X/6EG24N9ETK4/D3M is produced by Bosch Rexroth for the WRZ Proportional Directional Valves series and is intended to modulate flow and direction in hydraulic automation loops. A DC voltage supply energizes the solenoid, and the coil presents 4.8 Ω at 20 °C to control current rise without auxiliary resistors. Maximum current is limited to 1.5 A so the electronics can be sized for moderate output devices. A 100 % duty cycle permits continuous positioning without forced cooling, while the coil can reach up to 150 °C before thermal limits are met. The electrical plug follows DIN EN 175301-803 to align with common field wiring. Ingress protection is IP65, allowing installation where dust and low-pressure water jets are present. A concealed manual override lets maintenance staff shift the spool for testing without exposing the mechanism, and pilot stage size 6 supports standard pilot pressure circuits.
The hydraulic end interfaces with manifolds using the ISO 4401-07-06-0-94 pattern, ensuring interchangeability with other size 07 subplates. At a differential pressure of 10 bar the unit passes 150 L/min, giving adequate flow for medium power actuators. Main ports withstand up to 350 bar so the device suits high-pressure supply lines, whereas the internal return line is rated for 30 bar to protect seals during back-pressure events. Port a, b, p, and t each measure 20 mm in diameter to minimize velocity losses. Pilot oil is taken from and returned to the interior channels, removing the need for external pilot hoses and reducing leak points. Total mass is 13.4 kg, which must be supported by the manifold bolts and allows single-person handling during assembly.
Technical Specifications
Coil Resistance (20 °c)
4.8 Ω
Duty Cycle
100%
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure (main)
350 bar
Max Return Flow Pressure (t, Internal)
30 bar
Mounting Interface
ISO 4401-07-06-0-94
Nominal Flow (10 Bar Δp)
150 L/min
Pilot Oil Supply/drain
Internal
Pilot Valve Size
6
Port Diameter (a/b/p/t)
20 mm
Type Of Protection
IP65
Voltage Type
DC
Weight
13.4 kg
1620 Old Apex Road
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