R900924607 4WREE10V75-2X/G24K31/A1V Hydraulic proportional valve

Key Differences & Selection Guide

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

   A:​ The V-spool​ has an H-type center​ (all ports connected in mid-position), allowing the actuator to float freely. This is ideal for applications like motor control or where external forces can move the cylinder. In contrast, W-spools are overlap spools used for precise acceleration control.

2. Q: Why choose the /A1 version?

   A:​ The /A1​ suffix (±10 V DC voltage input) is standard for many PLC analog output cards and motion controllers. It is simple to interface but can be susceptible to noise over long cable runs. For noisy environments, the /F1​ version (4–20 mA) is recommended.

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 ±10 V command signal.

4. 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.