REXROTH

4WRZ16W8-150-7X/6EG24N9ETK4/D3M Proportional Valve R900972872

The Bosch Rexroth 4WRZ16W8-150-7X/6EG24N9ETK4/D3M proportional valve, material number R900972872, is a pilot-operated proportional directional valve used for hydraulic flow direction and flow size control. It belongs to the Bosch Rexroth 4WRZ series, which is designed for electro-hydraulic proportional control with external control electronics. This valve is used in industrial hydraulic systems where actuator speed, movement direction and flow response must be controlled more precisely than with a standard on/off directional valve.

The complete model code 4WRZ16W8-150-7X/6EG24N9ETK4/D3M is essential for accurate product identification. The 4WRZ series identifies a pilot-operated proportional directional valve without integrated electronics. The size 16 construction is suitable for subplate-mounted hydraulic circuits. The W8 spool symbol must be checked against the machine hydraulic schematic before replacement. The 150 code identifies the rated flow option, and the 7X code indicates component series 70 to 79, with unchanged installation and connection dimensions within the same series range.

According to Bosch Rexroth technical data for the 4WRZ valve family, these valves are pilot-operated directional valves actuated by proportional solenoids. Their function is to control both the direction and magnitude of hydraulic flow. For type 4WRZ, the proportional solenoids are controlled by separate external electronics, so the matching amplifier or control module should be verified when replacing a valve in an existing hydraulic system.

The model code 4WRZ16W8-150-7X/6EG24N9ETK4/D3M includes several important configuration details. The G24 section indicates a 24 V DC electrical configuration. The N9 code identifies a concealed manual override. The ET code indicates internal pilot oil supply and internal pilot oil return. The K4 code refers to the electrical connection version without cable socket, using a component plug according to DIN EN 175301-803. The D3 code indicates a pressure reducing valve option, and the M seal code indicates NBR seals.

During operation, the main spool of the 4WRZ16W8-150-7X/6EG24N9ETK4/D3M proportional valve is moved by pilot pressure generated through the pilot control valve. When the proportional solenoid receives an electrical command signal, the pilot valve moves and directs pilot oil to the corresponding pressure chamber. This moves the main spool proportionally and opens the hydraulic flow path through controlled cross-sections. Depending on the command signal and spool position, flow can be directed from P to A and B to T, or from P to B and A to T.

This Bosch Rexroth valve is commonly used in industrial hydraulic systems where controlled flow response is required. Typical applications include hydraulic presses, forming machines, steel equipment, test benches, production machinery, heavy-duty hydraulic power units and automated systems requiring proportional actuator control. Because the valve affects the movement direction and speed of hydraulic actuators, it should always be matched by full model code, material number, spool symbol and electrical configuration.

For procurement teams and maintenance engineers, the key purchasing reference is 4WRZ16W8-150-7X/6EG24N9ETK4/D3M / R900972872. Short descriptions such as “4WRZ16 valve” or “Rexroth proportional valve” are not enough for safe replacement. Similar Bosch Rexroth 4WRZ valves may differ in spool symbol, nominal flow, pilot oil supply, pilot oil return, pressure reducing valve option, electrical connector, manual override and seal material. Using the full model and material number helps avoid ordering a non-matching valve.

Before ordering the Bosch Rexroth 4WRZ16W8-150-7X/6EG24N9ETK4/D3M proportional valve R900972872, customers should compare the nameplate, hydraulic schematic and original spare-parts list. If the valve is installed on a machine, photos of the valve nameplate, connector side and manifold mounting area can help confirm the configuration. If the external amplifier or control electronics are also required, they should be checked separately because the 4WRZ version uses external electronics.

Hydraulics Worldwide supplies hydraulic valves, pumps and industrial spare parts for international customers. If you are sourcing the 4WRZ16W8-150-7X/6EG24N9ETK4/D3M proportional valve R900972872, send us the full model code, required quantity and delivery destination for quotation support. You can also browse more hydraulic components from Hydraulics Worldwide or verify the manufacturer reference on the Bosch Rexroth official product page.

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