Huade hidraulički proporcionalni ventil usporedba rexroth tehnička analiza

As a representative enterprise in the field of hydraulics in China, Huade Hydraulic's proportional valve (such as the 4WRELE and 4WRPEH series) are indeed benchmarked against similar products of Rexroth in Germany, and have shown high substitution potential in medium and high pressure hydraulic systems. The following is a technical analysis of these two proportional valves and a comparison with Rexroth products:

1. Product model analysis  Take 4WRELE25W6-220L-4X for example:

Type: electro-hydraulic proportional directional valve (with position feedback)

Diameter: 25 (NG6 interface, in accordance with ISO 4401 standard)

Pressure level: 35MPa (medium and high pressure)

Flow rate: 220L/min (maximum)

Control mode: proportional solenoid + valve core position closed-loop control (LVDT feedback)

Application: Suitable for systems such as engineering machinery and metallurgical equipment that require high-precision flow and direction control, used for system pressure proportional adjustment, such as hydraulic pump station, press, etc.

2.Benchmarking products with Rexroth

4WRELE series vs Rexroth 4WRLE

Both are proportional directional valves with LVDT feedback, and the performance parameters (pressure, flow, response time) are similar.

Huade's valve body design, sealing technology and solenoid performance are close to Rexroth level, but the durability under extreme working conditions (such as high-frequency vibration, long-term continuous operation) may be slightly different.

3. Advantages of replacing Rexroth

Cost advantage: Huade's product price is usually 20%-30% lower than Rexroth, with significant cost performance.

Domestic adaptation: localized supply chain, short delivery cycle, and fast after-sales service response.

Technical compatibility: interface size and electrical signals (such as 0-10V or 4-20mA) are compatible with Rexroth and can be directly replaced.

Performance compliance: In the medium and high voltage (21-35MPa) range, static accuracy (±1% FS), repeatability (±0.5%) and other indicators have met most industrial needs.

4. Differences to note

Dynamic response: Rexroth still has an advantage in high-frequency response (such as servo systems), and Huade may need to adjust parameters in a targeted manner.

Extreme working conditions: In long-term high temperature (>80°C) or highly polluted environments (NAS level 9 or above), Rexroth's materials and processes are more mature.

Brand recognition: Some international projects or high-end equipment still specify Rexroth, and customers need to approve domestic substitution.

5. Practical application suggestions

Replacement scenarios: In medium and high pressure systems such as metallurgy, injection molding machines, and mining machinery, Huade proportional valves can completely replace Rexroth, but the oil cleanliness must be ensured (within NAS 1638 level 8).

Debugging optimization: It is recommended to use Huade's matching amplifier or compatible controller to match the dynamic characteristics of the valve.

Verification test: Perform a pressure-flow curve test during the first replacement to verify the stability of the system.

Conclusion

Huade's 4WRELE series proportional valves have the ability to compete with Rexroth in the medium and high pressure field, especially in the cost-sensitive market. For most industrial applications, it can be regarded as a reliable alternative to Rexroth, but it needs to be carefully evaluated in high-frequency response or extreme environments. It is recommended to cooperate with Huade's technical team to select the model based on specific working conditions to maximize cost performance.