Description
Product Overview
The REXROTH 4WRL 16WZ180S-30/G24Z4/M is an electro-hydraulic directional control valve designed for precise control of hydraulic flow and actuator movement. The supplied listing identifies the unit by material/part number 0811404033, with the valve listed as a directional control valve and manufactured in Germany. The listed weight is approximately 11.38 kg.
The 4WRL family is a high-response 4/3-way valve series. Bosch Rexroth documentation for the 4WRL family identifies size 16 versions and configurations using G24 electrical control, Z4 plug-in connection, and M flow characteristic.
This type of valve is used where hydraulic equipment requires controlled directional movement rather than simple on/off fluid switching. It can be found in industrial hydraulic systems, machine tools, forming equipment, test equipment, and other applications requiring accurate hydraulic positioning.
Product Summary
REXROTH 4WRL 16WZ180S-30/G24Z4/M is a size-16 electro-hydraulic directional control valve configuration with a 24 VDC trigger-electronics designation and Z4 electrical connection.
The model code contains several useful configuration details. Bosch Rexroth documentation identifies G24 as +24 VDC supply for the trigger electronics, Z4 as a plug-in connector according to DIN 43560-AM2, and M as a progressive characteristic with linear fine metering.
Because the exact material-number/model relationship shown in different online sources is inconsistent, buyers should verify the nameplate and complete ordering code before using this valve as a replacement.
Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | REXROTH / Bosch Rexroth |
| Model | 4WRL 16WZ180S-30/G24Z4/M |
| Material / Part Number | 0811404033 |
| Product Type | Electro-Hydraulic Directional Control Valve |
| Valve Series | 4WRL |
| Nominal Size | NG16 / Size 16 |
| Valve Configuration | 4/3-way family |
| Component Series | Series 30–39 designation in 4WRL documentation |
| Trigger Electronics Supply | +24 VDC |
| Electrical Connection | Z4 plug-in connector |
| Flow Characteristic | M — progressive with linear fine metering |
| Listed Weight | 11.380 kg |
| Country of Origin | Germany |
| Application | Industrial hydraulic control |
| Condition in supplied listing | New – Open Box |
The 4WRL documentation identifies NG16 as nominal size 16 and specifies the G24, Z4 and M coding described above. The condition and 11.38 kg weight come from the supplied eBay listing.
Model Code Explanation
The ordering code provides useful information when comparing replacement valves.
4WRL — 4/3-way servo/proportional directional valve family.
16 — nominal valve size NG16.
WZ180S — configuration designation shown on the supplied valve/listing. The complete suffix should be matched rather than interpreted separately.
30 — series designation. Bosch Rexroth documentation notes that series 30–39 retain the same installation and connection dimensions within the documented family.
G24 — +24 VDC supply for the trigger electronics.
Z4 — plug-in electrical connector, with the connector specified according to DIN 43560-AM2 in the 4WRL documentation.
M — progressive flow characteristic with linear fine metering.
Operating Principle
The valve controls hydraulic flow between the pressure, return, and actuator ports according to the commanded spool position.
In a proportional or servo-hydraulic system, the valve position determines the amount and direction of hydraulic flow. This allows the connected cylinder or hydraulic motor to move in a controlled manner rather than simply switching between fully open and fully closed states.
The 4WRL family is intended for applications where response and metering characteristics are important. The M characteristic provides progressive behavior with linear fine metering, which is useful when smoother low-flow control is required.
Main Features
- Bosch Rexroth 4WRL valve family
- Nominal size NG16
- Electro-hydraulic directional control
- 4/3-way valve configuration
- +24 VDC trigger-electronics supply designation
- Z4 plug-in electrical connection
- Progressive M flow characteristic
- Linear fine metering
- Suitable for industrial hydraulic control systems
- German-manufactured unit according to the supplied listing
- Material number 0811404033
Hydraulic System Applications
This type of valve can be used in hydraulic systems requiring controlled actuator direction and flow.
Typical applications include:
- Industrial hydraulic machinery
- Machine tools
- Metal-forming equipment
- Hydraulic presses
- Injection and forming machinery
- Test and simulation equipment
- Material-handling machinery
- Industrial motion-control systems
- Hydraulic positioning systems
- Marine and heavy industrial equipment
The exact application depends on the hydraulic circuit, pressure requirements, actuator size, controller, and valve configuration.
Installation Guide
Before installing the valve, completely depressurize the hydraulic system and isolate the electrical supply.
Clean the mounting surface and hydraulic connections before installation. Hydraulic contamination can cause spool sticking, unstable movement, leakage, and premature valve wear.
Check the following before installation:
- Complete Rexroth ordering code
- Material number
- Valve size
- Hydraulic port arrangement
- Mounting pattern
- Electrical connector
- 24 VDC control supply
- Seal condition
- Hydraulic-fluid compatibility
- System pressure and required flow
Install the valve using the manufacturer’s specified mounting hardware and tightening procedure. Do not force hydraulic connections into alignment, as this can place mechanical stress on the valve body.
After installation, remove air from the hydraulic circuit where required and gradually pressurize the system. Check all connections for leakage before placing the equipment into normal operation.
Commissioning and Testing
During commissioning, verify that the valve receives the correct control supply and that the electrical connector is correctly installed.
A controlled test should include:
- Check supply voltage.
- Verify electrical polarity and wiring.
- Confirm hydraulic connections.
- Start the hydraulic system at reduced operating conditions where practical.
- Check neutral-position behavior.
- Command movement in both directions.
- Observe actuator response.
- Check for abnormal vibration, noise, leakage, or unstable movement.
- Confirm the valve returns correctly when the control signal is removed.
- Compare actual hydraulic performance with the machine’s expected operating parameters.
Do not exceed the pressure, flow, temperature, or fluid limits specified for the exact valve configuration.
Maintenance
Regular hydraulic-fluid cleanliness is one of the most important maintenance factors for a proportional or servo-type valve.
Recommended maintenance checks include:
- Inspect hydraulic connections for leakage.
- Check electrical connectors for contamination or looseness.
- Monitor hydraulic-fluid cleanliness.
- Replace or maintain filters according to the hydraulic system maintenance schedule.
- Check for abnormal actuator movement.
- Watch for spool sticking or sluggish response.
- Inspect the valve body for corrosion or mechanical damage.
- Check seals during planned maintenance.
- Record operating problems before replacing the valve.
If the valve develops unstable movement, delayed response, or leakage, check the hydraulic circuit and contamination level before assuming the valve itself has failed.
Replacement Compatibility
When replacing an existing valve, do not match only the nominal size.
The following should be compared:
Material number: 0811404033
Ordering code: 4WRL 16WZ180S-30/G24Z4/M
Valve size: NG16
Electrical configuration: G24 / +24 VDC
Connector: Z4
Flow characteristic: M
Hydraulic circuit: Port and spool configuration
Series/revision: Confirm from the nameplate
There is an important identification issue with this particular material number: some online databases and reseller listings associate 0811404033 with a different Rexroth model, 4WRPH 6 C3 B04L-2X/G24Z4/M. That configuration is separately described as a size-6 high-response valve with electrical position feedback.
For this reason, the physical nameplate and complete ordering code on the valve should take priority over a third-party database when confirming compatibility.
Inspection Before Shipment
For this valve, recommended inspection includes:
- Verify Rexroth branding.
- Confirm the complete 4WRL model marking.
- Confirm material number 0811404033.
- Photograph the nameplate.
- Inspect valve body for impact or corrosion.
- Check hydraulic ports and sealing surfaces.
- Inspect the electrical connector.
- Check mounting surfaces.
- Inspect exposed spool/actuation areas where applicable.
- Verify that protective caps are installed during storage and shipment.
- Perform electrical or hydraulic testing when suitable equipment is available.
The supplied eBay listing describes the unit as New – Open Box and states that it is in excellent new condition with no functional defects.
Storage and Handling
Keep the valve protected from dust, moisture, and contamination when it is not installed.
Hydraulic ports should remain sealed during storage and transportation. Avoid placing the valve directly on its hydraulic connections, electrical connector, or other sensitive surfaces.
Because the listed unit weighs approximately 11.38 kg, use suitable handling procedures during installation to avoid dropping or damaging the valve.
Frequently Asked Questions
What is the REXROTH 4WRL 16WZ180S-30/G24Z4/M?
It is an electro-hydraulic directional control valve in the Rexroth 4WRL family, with nominal size NG16.
What is the material number?
The supplied listing identifies the material/part number as 0811404033.
What does G24 mean?
In the 4WRL ordering information, G24 indicates a +24 VDC supply for the trigger electronics.
What does Z4 mean?
Z4 identifies the plug-in electrical connector configuration specified in the Rexroth 4WRL documentation.
What does M mean?
M identifies the progressive flow characteristic with linear fine metering.
Is 0811404033 definitely interchangeable with other Rexroth valves?
No. The complete ordering code, hydraulic configuration, mounting arrangement, electrical interface, and system requirements should be compared. Online sources currently show a conflicting model association for material number 0811404033, so physical nameplate verification is especially important.
Search Terms
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