R900954089 4WRAE10W1-60-2X/G24K31/A1V Proportional valve imported from Rexroth with original packaging

Key Differences & FAQs

1. Q: What is the main difference between this valve (4WRAE) and the 4WREE series?

   A:​ The 4WRAE series has no LVDT feedback​ (open-loop force control), making it less precise but more cost-effective. The 4WREE series​ features closed-loop spool position control via LVDT, offering higher accuracy and repeatability.

2. Q: What does the "W1" spool mean?

   A:​ The W1 spool​ is an overlap spool​ with a specific metering characteristic. It has a small dead zone at the center position, which provides smooth acceleration/deceleration and prevents actuator creep, making it ideal for applications requiring fine control at low flows.

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

   A:​ No.​ The 4WRAE​ designation and /G24K31​ suffix indicate that the valve has Integrated On-Board Electronics (OBE). The amplifier is built into the valve coil, so you only need to provide a 24V DC power supply and a ±10V control signal.

4. Q: What is the control signal for this valve?

   A:​ The /A1​ suffix explicitly indicates a ±10 V DC​ analog voltage input. If you need a 4–20 mA current input, you would need the /F1​ version (e.g., R900965674).

5. Q: Is the mounting compatible with other NG10 valves?

   A:​ Yes.​ The "2X"​ series uses the standard ISO 4401-05-04-0-05​ mounting interface for NG10 valves. It is directly interchangeable with other NG10 "2X" series valves (e.g., 4WRA10, 4WRAE10).

6. Q: What is the critical installation note?

   A:​ Ensure the T port (tank)​ is connected to the tank without significant backpressure. Since this valve has integrated electronics, ensure a stable 24V DC power supply to avoid voltage drops that can affect performance. The W1 spool is sensitive to contamination, so ensure the hydraulic oil is clean (typically NAS 1638 Class 8 or better).