4WE6/4WE10 Replacement: KYDAC DSG-02/03 Guide

We recognize that sometimes a 4WE6 or 4WE10 solenoid valve will fail, go on allocation, or simply not be on the import shelf for cost reasons. In these instances we ask whether there is a KYDAC equivalent that can be brought in off the shelf without having to redesign a manifold. The DSG-02/03 series of solenoid valves are designed to cover 30+ spool functions with cross-reference options for common 4WE6 and 4WE10 type valves. This would include functions such as 4WE6E and 4WE10D which have a corresponding DSG-02/03 model.

This guide describes the cross-reference table, required checks before fitting and the corresponding KYDAC 4WE-named valves that are designed for compatible mounting applications.

Why Operators Look for 4WE6 and 4WE10 Replacements

Solenoid-operated directional valves, 4WE6 and 4WE10, are workhorses for mobile and industrial applications, found in excavator booms, loader lift applications, press lines, and hydraulic power units to name a few. Discontinued parts, back-ordered for weeks, or priced in a manner that is not within a maintenance budget can prompt OEMs and integrators to search for same specification parts.

The key requirement is a compatible replacement: same nominal size, same mounting face, same spool function, and same voltage options. You do not want to re-plumb the manifold or rewrite the electrical schematic. KYDAC’s DSG-02/03 series and its own 4WE-named valves are designed for this type of replacement application. The 4WE10E31B solenoid directional valve is one example of a KYDAC part that carries the 4WE naming directly.

The DSG-02/03 Cross-Reference

The KYDAC product manual contains a look-up table to find equivalent spool functions for common 4WE6 and 4WE10 type valves. Both nominal sizes are included in the table: NG6 for the 4WE6 family and NG10 for the 4WE10 family. This list of spool functions is by no means complete and comprises more than 30 different spool functions.

The DSG model number indicates the spool function. In many cases the same spool-function code is available for both NG6 and NG10 versions. For example, DSG-02/03-2B2 corresponds to the D-type spool function. The correct nominal valve size must still match the manifold already in place.

Matching Your 4WE Model to the DSG Equivalent

Read the function code from the model number on the replacement valve and the spool symbol from the body of the new valve. The DSG-02/03 lookup table shows the corresponding functions for common 4WE6 and 4WE10 type valves. For example, DSG-02/03-2B2 corresponds to the D-type spool function.

Reference the table above to verify the spool function where the symbol on the nameplate or data sheet is not clearly identifiable. Where the symbol is not clearly identified, provide the full model number and engineering will verify the mapping for you prior to ordering.

Specs to Verify Before the Swap

Just because a valve has a similar model number does not mean it can be fitted to a machine without verification of several physical characteristics. In addition to the previously mentioned ratings, the DSG-02/03 series as well as the 4WE series from KYDAC also have:

NG6 valves (4WE6 / DSG-02 size): maximum working pressure P/A/B ports 35 MPa, T port 21 MPa, nominal flow 80 L/min. NG10 valves (4WE10 / DSG-03 size): maximum working pressure P/A/B ports 35 MPa, T port 21 MPa, nominal flow 120 L/min. The valves are powered by DC 12V/24V or AC 110V/220V. The bodies are made of cast iron or stainless steel depending on the model.

Beyond the electrical and hydraulic ratings, check the ISO mounting pattern, mounting dimensions, port positions, seals, and the solenoid connector. If the subplate is also being replaced, check its external BSP, NPT, SAE, or other piping connections separately. The 4WE6H61B is an NG6 model in the KYDAC line with the same 35 MPa / 80 L/min rating.

KYDAC 4WE Series: Same Naming, Compatible Fit

In addition to the DSG-02/03 cross-reference, KYDAC also manufactures valves with 4WE model naming such as 4WE6E61B, 4WE6H61B, 4WE10D31B, 4WE10E31B, 4WE10G31B etc. These valves are designed as compatible alternatives for corresponding applications, but the mounting interface, spool function, pressure ratings, voltage, connector, and other model-specific details should be verified before replacement. The name on the nameplate indicates the nominal size and the function.

A system integrator with a mixed fleet of imported hydraulic hardware benefits from having a simpler spare parts list. The same spool-function family can simplify cross-referencing between different valves. However, separate NG6 and NG10 valves must be stocked because the two sizes use different mounting interfaces.

Conclusion

If you are running a 4WE6 or 4WE10 solenoid valve in your circuit, a KYDAC equivalent may be available within the standard range. Using the DSG-02/03 cross-reference table, you can identify the corresponding spool function and valve size. The KYDAC 4WE-named series also provides an option where the 4WE naming format is preferred.

Check the nominal size, mounting interface, spool symbol, solenoid arrangement, pressure ratings, voltage and connector before confirming the replacement.

We can provide you with the complete list of more than 30 models or check the function mapping for a specific model when you provide us with the model number of your existing valve and the details of the application of the directional control valve. The engineering team of KYDAC will then search for the corresponding DSG or 4WE part and check the mounting dimensions on your manifold against the part.

FAQ

Q: Which KYDAC valve can replace a 4WE6E-series valve?

A KYDAC 4WE6E-series valve may be a compatible alternative, but the full model code should be checked first. Confirm the spool function, nominal size, pressure rating, solenoid voltage, connector, and other options before ordering. The DSG-02 cross-reference also covers common 4WE6 spool functions.

Q: Can the same DSG spool function be used for both 4WE6 and 4WE10 replacements?

The same spool-function code may be available in both sizes, but the NG6 and NG10 valves are physically different. Select the correct size for the existing mounting interface. A DSG-02 version is used for the smaller NG6 size, while DSG-03 is used for the larger NG10 size.

Q: What voltage options are available on the DSG-02/03 series?

DC 12V and DC 24V are the standard solenoid voltages. AC 110V and AC 220V are also available. The voltage code is part of the full model number, for example CG24 means DC 24V and CW220-50 means AC 220V 50 Hz. Match it to your control cabinet supply.

Q: Is the body material the same as the original valve?

KYDAC offers cast iron and stainless steel body options across the 4WE and DSG series depending on the model. For most mobile and industrial applications the cast iron body is commonly used. Stainless steel options may be selected for applications where additional corrosion resistance is required.