4WRZ16E1-150-7X/6EG24N9ETK4/M

The 4WRZ16E1-150-7X/6EG24N9ETK4/M valve is part of the WRZ Proportional Directional Valves series produced by Bosch Rexroth for hydraulic automation tasks such as accurate actuator speed and position control. It operates on a supply voltage of 24 V DC, allowing direct interface with common machine controllers. The coil draws a maximum current of 1.5 A so drive cards must limit output accordingly. A coil resistance of 4.8 Ω at 20 °C defines the relationship between applied voltage and current for steady energization. Continuous service is possible because the duty cycle is rated at 100 %, preventing heat-related shutdowns during sustained commands. The coil insulation tolerates temperatures up to 150 °C, safeguarding performance in warm manifolds. A DIN EN 175301-803 plug provides a standardized electrical connection for quick field replacement. Protection class IP65 keeps dust and water jets away from the solenoid housing in typical plant environments. A concealed manual override (N9) lets technicians shift the spool mechanically when electrical power is unavailable.

The hydraulic section supports a maximum main valve flow of 460 l/min, giving the unit capacity for large cylinder circuits. Nominal flow is 150 l/min at a 10 bar pressure drop, which represents the expected rating for proportional metering in most systems. Main ports withstand operating pressures up to 350 bar so the valve can be installed in high-pressure lines without additional relief devices. Internal pilot oil supply and drain (ET) simplify plumbing because no external pilot hoses are needed. The tank port must remain below 30 bar, the specified limit for Port T when the internal drain path is used. An ISO 4401-07-06-0-94 mounting pattern allows direct bolting to widely available size 07 subplates. A command value overlap of 15 % defines the neutral deadband required for stable null positioning. The assembly weighs 13.4 kg, a factor to consider when selecting manifold supports and during installation.