0811404902 4WRPH10C3B100L-2X/G24K0/M-750 Proportional directional control valve from Rexroth Germany

FAQ:

1. Spool Type (C3)

   The C3 spool​ is a zero-overlap (critical center) spool​ with servo-valve quality. This design provides high linearity and fast response, ideal for closed-loop control applications. The "B100L" indicates a specific flow gain characteristic (100 L/min​ with linear characteristic "L").

2. External Electronics (K0)

   The suffix /K0​ indicates that this valve does not have integrated on-board electronics (OBE). It must be used with an external proportional amplifier​ (e.g., Rexroth VT-5000 series or equivalent) to power the solenoid and process the LVDT feedback signal.

3. Manual Override (M)

   The /M​ suffix indicates the presence of a concealed manual override​ mechanism. This allows for manual operation of the spool for testing or emergency purposes, which is a key differentiator from valves without this feature.

4. Fail-Safe Behavior

   This valve is single-side actuated​ (single proportional solenoid with spring return). In the event of power failure or signal loss, the spring returns the spool to a defined 4/4 fail-safe position​ (typically all ports blocked).

5. Critical Installation Notes

   • Amplifier Required:​ You must pair this valve with a compatible external amplifier. The control signal (e.g., ±10 V) is connected to the amplifier, not directly to the valve.

   • Cleanliness:​ Maintain high oil cleanliness (recommended ISO 4406 18/16/13 or better) due to the sensitive servo-type spool and sleeve assembly.

   • Mounting:​ Use the correct ISO 4401-05 (NG10) subplate to ensure proper port alignment and sealing.