4WRZ16W9-150-7X/6EG24N9EK4/M

The 4WRZ16W9-150-7X/6EG24N9EK4/M valve is manufactured by Bosch Rexroth within the WRZ Proportional Directional Valves series and is intended to meter hydraulic flow in automated motion circuits. Its nominal size of 16 defines the passage area and helps match the unit to medium-frame manifolds, while spool symbol W9 establishes the flow path arrangement required for bidirectional actuator control. Under a 10-bar pressure drop the rated flow reaches 150 l/min, giving designers a baseline for throttle calculations. A 6E proportional solenoid pilot valve provides continuously variable spool positioning, and the coils are powered from a 24 V DC supply for compatibility with common machine controllers. The K4 style plug according to DIN EN 175301-803 forms the electrical connection and permits quick field replacement. For service tasks a concealed N9 manual override permits direct spool shifting without energizing the solenoid. Pilot oil is taken internally and returned externally, denoted by the letter E, so the drain line can be routed to a low-pressure tank port.

For high-demand functions the main stage accepts up to 460 l/min, ensuring adequate volume for large cylinders or motors. System pressure capability is 350 bar, allowing the valve to operate in heavy-duty presses and die-casting machines. When an external drain is used, port T tolerates 250 bar, whereas an internal drain path is limited to 30 bar to protect the cover seal. Interface mounting follows ISO 4401-07-07-0-05, so the component bolts directly to standardized subplates without adapter blocks. All dynamic seals are made from NBR, identified by the M code, which suits mineral oil fluids in typical industrial temperature ranges. The assembly weighs 11.9 kg, light enough for manual installation yet robust for continuous service. These limits on flow, pressure, drainage, and connection pattern complete the data set necessary to integrate the valve into closed-loop hydraulic control systems.