Rexroth 4WRZE Pilot Proportional Directional Valve

Rexroth 4WRZE Pilot Proportional Directional Valve，R900925738 4WRZE16W8-150-7X/6EG24N9ETK31/F1D3V

In modern industrial hydraulic technology, proportional directional valves are important. Rexroth4WRZEPilot operated proportional directional valves have become the choice of many industries due to their functionality and performance.

Rexroth4WRZE25Belonging to a pilot operated proportional directional valve, without displacement feedback, suitable for nominal pressure350 barThe maximum traffic can reach2800 L/minThe valve adopts a plate structure for installation and is suitable for various connection methods, including flange connection and plate installation.

The valve is integrated with an amplification plate, which can be operated through digital or analog methods to ensure precise control. Its operation is controlled by a detachable proportional electromagnet, supporting emergency manual operation options, and the valve core can be stabilized by spring centering.

Rexroth proportional valve4WRZE25W8-325-7X/6EG24N9ETK31/A1D3MFlexibility characteristics, suitable for the needs of various hydraulic environments. This valve supports an external electronic controller, whichprecisionElectronic integrated devices provide the possibility of real-time control. In addition, the modular design of the valve makes maintenance and replacement more convenient, further improving the reliability and durability of the system.

Rexroth's4WRZEOne of the characteristics of a proportional directional valve is its manual emergency operation option. In emergency situations, manual operation functions can ensure the flexibility of the system. The spring centering control valve core ensures accurate reset after each operation. In addition, the control electronic components of the valve have different input options and modelsWRZESupports voltage or current input. For specific applications, digital or analog amplifiers that comply with European standards can also be selected, and these modules need to be ordered separately.

Partial model recommendations:

R900949807 4WRZE25W8-325-7X/6EG24N9ETK31/F1D3V

R901178304 4WRZE25E1-325-7X/6EG24N9ETK31/F1D3V

R900925738 4WRZE16W8-150-7X/6EG24N9ETK31/F1D3V

R900953732 4WRZE10E1-85-7X/6EG24N9ETK31/F1D3V

The working principle of a proportional valve is very simple. I actually want to do a good job with proportional valvesThere are still many details to be done. The casting requirements for valve bodies are very high, -Generally, hydraulic valves have to withstand high pressure,-Ordinary cast iron will produce when subjected to high pressure inside“Leakage, which we often refer to as“sweating'.

Spiral plug-in proportional valves come in various forms such as two-way, three-way, four-way, and multi way. The two-way proportional valve is mainly a proportional throttle valve, which often forms a composite valve with other components to control flow and pressure;The three-way proportional valve is the main proportional pressure reducing valve, which is also widely used in mobile mechanical hydraulic systems. It mainly operates the pilot oil circuit of the hydraulic operated multi way valve. The use of three-way proportional pressure reducing valves can replace traditional manual pressure reducing pilot valves, which have more flexibility and higher control accuracy than manual pilot valves.

It can be made into a proportional servo controlled manual multi way valve. With different input signals, the pressure reducing valve enables the output piston to have different pressures or flow rates, thereby achieving proportional control of the displacement of the multi way valve core. The valve chamber and valve core require high machining accuracy,Roundness, coaxiality of different cylindrical surfaces,Because the fit between the valve core and the valve body needs to ensure both good sealing performance and relatively low friction, once the roundness orcoaxialityLarge error,The valve core may get stuck during operation.-If it gets stuck, it may malfunction.

If the plug of the solenoid valve coil is equipped with a light-emitting diode power indicator light, then useDCWhen the power drives the solenoid valve, it must be connected correctly, otherwise the indicator light will not light up. Additionally, do not swap power plugs with LED power indicators of different voltage levels, as this may cause the LED to burn out/The power supply (switch to a low voltage plug) has a short circuit or the LED light is very weak (switch to a high voltage plug).

Common models:
859AN00004A KBSDG4V-3-92L-12N-M1-PE7-H7-12

857AN00258A KBDG5V-7-2C180N-T-M1-PE7-H1-10

863AN00004A KBXG-6-W160-Z-M1-3-A-PE7-H1-11

821AN00028C KDG5V-8-33C330N-E-H-M-U-H1-20

859AN00023A KBSDG4V-3-92L-24N-M2-PE7-H7-12

Rexroth proportional valve4WRZE25W8-325-7X/6EG24N9EK31/F1D3MAs a key hydraulic control component, it has been widely used in the fields of industrial automation and heavy machinery equipment. Correct installation is an important guarantee for ensuring the normal operation and safe operation of proportional valves. Therefore, this article will provide a detailed introductionREXROTHInstallation manual and related precautions for proportional valves.

1、 Preparation before installation

Before installing the Rexroth proportional valve, the following preparations need to be made:

1.Check if the proportional valve model is correct and if its maximum working pressure and flow range match the actual requirements of the hydraulic system.

2.Check whether the appearance of the proportional valve is intact, especially whether there are cracks or wear in key parts such as the valve body and throttle port.

3.Check if the connection thread of the proportional valve is correct, confirm if the interface size and thread type of the proportional valve with other hydraulic components such as pipelines and actuators are the same, and use gaskets or sealants as needed for connection.

4.Clean the impurities and dirt inside the proportional valve and pipeline to avoid affecting the normal operation of the proportional valve.

2、 Installation steps

1.Select installation location

During installationREXROTHWhen using a proportional valve, it is necessary to select an appropriate position and ensure that it meets the following conditions:

（1）The distance from hydraulic devices such as hydraulic pumps and oil tanks is not far, in order to reduce pipeline resistance.

（2）It can facilitate maintenance and repair, especially without being limited by other equipment and components.

（3）It can meet the requirements of safe and stable operation of hydraulic systems, such as not being easily affected by factors such as vibration, impact, and high temperature.

2.Fixed proportional valve

The Rexroth proportional valve can be fixed in the selected position using methods such as bolt fixing or flange connection. When fixed, it should be sturdy and secure to prevent the proportional valve from loosening and shifting due to vibration or other reasons.

3.Connecting pipelines

connectionREXROTHWhen using proportional valves and pipelines, the following points should be noted:

（1）Correctly select the type of pipeline interface and thread model to ensure a tight and reliable connection between the proportional valve and the pipeline.

（2）Use sealant or gasket materials to ensure that there is no oil leakage at the connection.

（3）Avoid excessively long or bent pipelines to reduce pipeline resistance and pressure loss, while ensuring that the pipelines are not subjected to deformation such as pulling or squeezing.

4.Connect the signal cable

The control signal of Rexroth proportional valves is usually transmitted through cables. When wiring, the following points should be noted:

（1）Correctly select the specifications and models of signal lines to ensure that they can withstand the required current and voltage.

（2）Follow the wiring diagram of the proportional valve to ensure that there is no short circuit or reverse connection between the interfaces.

（3）Fix the signal wire in the appropriate position to avoid loosening or breaking due to vibration or other reasons.

3、 Test after installation

After installation, the following tests are required:

1.Check whether the opening and closing of the proportional valve is normal, that is, by adjusting the control signal, confirm that the proportional valve can open or close the throttle port as required.

2.Check whether the flow and pressure are stable, and confirm whether the flow regulation and control accuracy of the proportional valve meet the requirements.

3.Check for oil and gas leaks, especially whether the proportional valve and pipeline connections are tight and reliable.

4、 Precautions

During the installation process of the Rexroth proportional valve, the following points should also be noted:

1.During the installation process, it is necessary to strictly follow the installation manual to avoid damage to the proportional valve or other safety issues caused by misoperation or excessive force.

2.Before installation, it is necessary to carefully check whether there are impurities and dirt inside the proportional valve and pipeline, and clean them thoroughly.

3.Choose the appropriate installation location and fixing method to ensure the stable and safe operation of the proportional valve.

4.When connecting pipelines and signal lines, attention should be paid to selecting the correct connection method and material, and ensuring a tight and reliable connection.

5.After installation, testing and inspection are required to confirm whether the flow control and pressure regulation of the proportional valve meet the requirements.

In short,REXROTHproportional valve4WRZE25W8-325-7X/6EG24N9EK31/F1D3MThe installation of the introduction is an important guarantee for the normal operation and safe work of the hydraulic system. According to the requirements of the installation manual, strict and meticulous operation can improve the service life and performance stability of the proportional valve, while also reducing accidents and malfunctions caused by improper installation.