Rexroth A4VSO250 Axial Piston Pump 30R Flange Mount ISO Certified

The A4VSO series offers a wide range of control methods to suit various hydraulic system requirements. The primary control types include:

• DR: Pressure Control (or Constant Pressure Control)
• FR: Flow Control
• LR: Dual-Line/Hyperbolic Constant Power Control (Automatically regulates power consumption)
• MA: Manual Control
• EM: Electric Motor Control
• HM: Hydraulic Control, Flow-Dependent
• HS: Hydraulic Control with Servo/Proportional Valve
• EO / EO2: Electronic Proportional Control
• HD: Hydraulic Control, Pressure-Dependent
• DS: Speed Control for Secondary Control

The control method is a critical part of the pump's model designation. It is typically represented by two or three letters in the code sequence (e.g., A4VSO180DR/30R-PPB13N00).

• In this example, DR signifies the control type, which is Pressure Control.
• Other suffixes like LR (Constant Power), FR (Flow Control), or EO (Electronic Control) directly indicate the specific control method employed by that pump unit.

The choice of control method depends heavily on the application's needs:

• DR (Pressure Control): Ideal for systems requiring a constant pressure level, often used in clamping circuits or press applications.
• LR (Constant Power Control): Well-suited for applications where the input power needs to be limited automatically, protecting the drive system despite pressure and flow variations, potentially useful in mobile equipment or complex industrial machinery.
• EO (Electronic Proportional Control): Offers precise control over pump operation (like flow or pressure) via an electrical signal, commonly found in modern automated machinery and process control systems requiring high precision.
• FR (Flow Control): Used when a constant flow output is desired regardless of pressure changes (within the pump's capabilities).