4WRZ16W8-150-7X/6EG24N9K4/D3V

The 4WRZ16W8-150-7X/6EG24N9K4/D3V proportional directional valve belongs to the WRZ Proportional Directional Valves series from Bosch Rexroth and is used to direct hydraulic flow in automation circuits. The valve size is 16, establishing the envelope and mounting bolt pattern needed for manifolds of that dimension. A nominal flow of 150 l/min lets the unit meter oil to cylinders or motors at a 10 bar differential. The main stage is designed for a maximum operating pressure of 350 bar so it can withstand common industrial supply lines without structural fatigue. Each service port—A, B, P, and T—has a diameter of 20 mm, ensuring consistent passage area and minimizing pressure loss. Pilot oil is supplied and drained externally, which removes pilot heat from the main tank and prevents cross-port contamination. The return flow pressure at port T may reach 250 bar, enabling remote tank lines or counterbalance circuits. Installation follows the ISO 4401-07-06-0-94 pattern, giving interchangeability with standard subplates. The electromagnetic actuation can run continuously at a 100 % duty cycle for uninterrupted control, and the assembly weighs 13.4 kg, allowing manual handling during maintenance.

In electrical terms, the 4WRZ16W8-150-7X/6EG24N9K4/D3V uses a 24 V DC supply so it can tie directly into common machine control power buses. The solenoid draws a maximum current of 1.5 A, defining the required output capacity of the driver card. Coil resistance measures 4.8 Ω at 20 °C, which sets the initial inrush behavior, while a hot resistance of 7.2 Ω limits current when the winding heats during prolonged operation. The coil may rise to a temperature of 150 °C without damage, maintaining reliability in high ambient or elevated oil temperature conditions. Electrical termination is through a DIN EN 175301-803 connector, giving quick plug-in serviceability. Once the matched cable socket is fitted, the housing attains an IP65 rating, protecting the coil against dust ingress and water jets that are typical around hydraulic power units. These electrical attributes integrate with the hydraulic features described earlier to provide precise, proportional spool positioning throughout demanding automation cycles.