R900597283 DR20-5-5X/100YM Rexroth stacked pressure reducing valve

Frequently Asked Questions (FAQ) for DR 20-5-5X/100YM (Order Code: R900597283)

Q1: What is the main application of this valve?

A:​ This valve is a medium-flow proportional pressure reducing valve. It is primarily used to provide precise, electronically controlled lower pressure in a specific branch of a hydraulic system, independent of the main system pressure. Common applications include machine tool clamping circuits, tension control systems, and as a pilot pressure source for other control valves.

Q2: What does the "100YM" designation mean?

A:​ The designation breaks down as follows:

• 100: The maximum adjustable reduced pressure is 100 bar.

• Y: The valve is operated by a proportional solenoid.

• M: The solenoid includes integrated On-Board Electronics (OBE), allowing for direct PWM signal control.

Q3: How is this model different from the DR 20-5-5X/200YM?

A:​ The key difference is the maximum controlled pressure.

• This model (100YM) is set for a maximum of 100 bar.

• The 200YM​ model can be set up to 200 bar.

  Both share the same NG20 size, flow capacity, and control method. The choice depends on the required force/pressure in the application.

Q4: How do I control this valve?

A:​ Control is achieved using a standard PWM (Pulse Width Modulation) signal, typically 24V DC. The valve's integrated electronics (OBE) allow it to connect directly to a PLC's PWM output or a compatible motion controller without an external analog amplifier.

Q5: How is the valve installed in a system?

A:​ It is a stacked (or sandwich) valve. It installs directly between an NG20 interface subplate​ (mounting surface per ISO 7368) and another valve or a cover plate, creating a compact, modular valve manifold.

Q6: 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 for a specific application depends on the acceptable pressure drop, which can be verified from the official performance curves.