R900962405 4WREE10W1-25-2X/G24K31/F1V Hydraulic valve German Rexroth proportional valve

Rexroth 4WREE10W1-25-2X/G24K31/F1V Proportional Directional Valve - Technical Specifications

Key Differences & Selection Guide

1. Q: What is the difference between "W1" and standard "W" spools?

   A:​ The W1 spool​ is a specific variant of the overlap spool family. It is designed for applications requiring smooth acceleration and deceleration​ with a particular flow curve. It typically has a slightly different mid-position characteristic compared to the standard W spool.

2. Q: Why choose this 25 L/min version?

   A:​ The 25 L/min rated flow​ (at 10 bar Δp) makes this valve ideal for lower flow, high-precision applications​ where fine control is needed. It is part of the same NG10 family as the 50 and 75 L/min versions but offers better resolution at smaller openings.

3. Q: Does this valve require an external amplifier?

   A:​ No.​ The "E" in 4WREE and the /G24K31​ suffix confirm Integrated On-Board Electronics (OBE). It operates directly with a 24V DC power supply and the 4–20 mA command signal.

4. Q: What is the advantage of the /F1 current input?

   A:​ The /F1​ suffix (4–20 mA current input) is more resistant to electrical noise over long cable runs compared to the /A1​ version (±10V voltage input). This makes it suitable for industrial environments with significant EMI.

5. Q: What is the critical installation note?

   A:​ Maintain the T-port backpressure below 210 bar. Due to the precision spool and LVDT, ensure high oil cleanliness (recommended NAS 1638 Class 8 or better) to prevent damage to the tight tolerances.