R901496435 4WREE6E32-3X/V/24F1 Proportional valve German Rexroth solenoid valve

FAQs for Rexroth 4WREE6E32-3X/V/24F1

1. Q: What is the main difference between this valve (R901496435) and the R901496430?

   A:​ The key difference is the control signal. R901496435 (/24F1) uses a 4–20 mA current input, while R901496430 (/24A1) uses a ±10V voltage input. The hydraulic performance (32 L/min flow, 350 bar pressure) and mechanical dimensions are identical. Choose the F1 variant if your PLC outputs 4–20 mA signals.

2. Q: How does the 4–20 mA signal map to spool movement?

   A:​ Typically, 4 mA​ corresponds to full spool stroke in one direction​ (P→A), 12 mA​ corresponds to the center (neutral) position, and 20 mA​ corresponds to full spool stroke in the opposite direction​ (P→B). This provides a fail-safe feature: signal loss (0 mA) usually drives the valve to a defined safe state.

3. Q: Can I use this 32 L/min valve to replace a 16 L/min valve?

   A:​ Hydraulically, yes​ (same NG6 footprint and pressure rating). However, the 32 L/min valve has a larger flow capacity. If your system was designed for 16 L/min, using this valve may require retuning the control loop gains to maintain stability, as the flow gain (ΔQ/ΔI) is higher.

4. Q: What is the purpose of the "E" spool?

   A:​ The "E" spool is a zero-overlap (critical center) spool​ with a linear flow characteristic. It provides very high resolution and repeatability, especially at low flows, making it ideal for precise closed-loop position or speed control applications. It has minimal internal leakage compared to overlap spools.

5. Q: Is an external amplifier required?

   A:​ No.​ The "4WREE" series has Integrated On-Board Electronics (OBE). You can connect the 4–20 mA signal and 24V power directly to the valve's 7-pin connector. Do not use an external VT-VSPA1-type amplifier card with this valve.

6. Q: What does the "3X" series mean for installation?

   A:​ "3X" indicates the component series​ (30-39). All "3X" series NG6 valves share identical mounting dimensions (ISO 4401-03). This means you can directly replace it with any other 4WREE6...-3X valve without modifying the manifold or subplate.