R900597233 DR20-5-5X/200YM Stacked pressure reducing valve Rexroth German hydraulic valve

Frequently Asked Questions (FAQ) for Rexroth DR 20-5-5X/200YM (R900597233)

Q1: What is the core function of this valve?

A:​ It is a three-port proportional pressure reducing valve. It electronically reduces a high primary system pressure (up to 315 bar) to a lower, stable, and adjustable secondary pressure (up to 200 bar) for a specific branch of a hydraulic circuit.

Q2: What does the "5-5X" in the model number indicate?

A:​ This suffix specifies the internal control spool design and damping characteristics. The "5-5X" variant is a common standard configuration optimized for general-purpose applications with balanced dynamic response and stability.

Q3: How does it differ from the DR 20G5-4X/100YM model?

A:​ The two key differences are:

1. Maximum Reduced Pressure:​ This model (200YM) provides up to 200 bar, double the 100 bar of the G5-4X/100YM variant.

2. Spool Design:​ The "5-5X" spool has different dynamic performance characteristics (flow capacity, response) compared to the "G5-4X" spool.

Q4: What is the flow capacity?

A:​ As an NG20 size valve, it has a nominal flow rate of approximately 250 liters per minute. The actual usable flow depends on the specific pressure drop; refer to the official performance curves.

Q5: How is the valve controlled?

A:​ It is controlled by a standard 24V DC PWM signal. The integrated onboard electronics (OBE) on the proportional solenoid simplify wiring, requiring only a PWM source from a PLC or amplifier.

Q6: How is it installed in a hydraulic system?

A:​ It is a sandwich valve. It mounts directly between a NG20 subplate​ (e.g., Rexroth RE 20-5 series) and another valve or cover plate above it, building a modular manifold stack.