0811404803 4WRPEH10C4B100L-2X/G24K0/A1M Rexroth German made proportional valve

FAQ:

1. Spool Type (C4)

   The C4 spool​ features a zero-overlap (critical center)​ design, providing high linearity and fast response typical of servo valves. The suffix B100L​ indicates a rated flow of 100 L/min with a linear flow characteristic (L).

2. Control & Feedback (/A1)

   The suffix /A1​ indicates a ±10 V DC voltage input​ for the command signal. The valve incorporates an LVDT (Linear Variable Differential Transformer)​ for real-time spool position feedback. The integrated On-Board Electronics (OBE)​ provides the closed-loop control, eliminating the need for an external amplifier card.

3. High Dynamic Performance & Fail-Safe

   As a direct-operated high-response valve, it offers a fast step response (typically < 20 ms). In the event of a power failure or loss of control signal (0 V), the spring returns the spool to a defined fail-safe position​ (typically a closed center or a specific porting configuration).

4. Critical Installation Notes

   • Oil Cleanliness:​ Due to the precise servo-type spool and sleeve assembly, maintain high oil cleanliness (recommended ISO 4406 18/16/13 or better).

   • Signal Wiring:​ The /A1 version uses a voltage signal. Ensure proper cable shielding to prevent electromagnetic interference.

   • Return Line Backpressure:​ The maximum allowable pressure at the T-port is 210 bar. Ensure the return line backpressure does not exceed this limit.