Rexroth Axial Piston Variable Pump/ Metering Pump A7VK

Rexroth A7VK axial piston variable pump

Description:

The Bosch Rexroth A7VK series axial piston variable pump is a high‑precision, variable displacement pump designed for metering or hydraulic systems requiring adjustable flow rates and reliable performance. Its robust bent‑axis design delivers excellent volumetric efficiency, smooth displacement control, and stable output even under variable loads. Thanks to its compact dimensions and flange/shaft compatibility (matching older series like A2VK), A7VK offers an easy retrofit or integration path while providing modern improvements in efficiency, corrosion resistance, and noise reduction.

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Rexroth Axial Piston Variable Pump/ Metering Pump A7VK

  • Variable Displacement & Precise Flow Control — The flow rate is continuously adjustable from zero to Vg_max by turning the handwheel, making it ideal for metering tasks or systems where flow must be tailored.

  • High Pressure Capability — Nominal operating pressure up to 250 bar, with maximum pressure capability up to 315 bar, suitable for demanding hydraulic applications.

  • Compact & Retrofit‑Friendly Design — Compared to the predecessor series (e.g., A2VK), the A7VK offers reduced dimensions and mass, with identical mounting flange and drive shaft interfaces — simplifying replacement and integration.

  • Durability & Corrosion Resistance — Special surface treatment, high‑quality sealing (double shaft seals), and optional high-pressure relief valve enhance longevity and reliability even in harsh environments.

  • Low Noise Operation & Efficient Performance — The robust bent-axis piston architecture ensures improved volumetric efficiency with minimal internal leakage and stable, quiet operation under varying pressures.

  • Flexibility (Open or Closed Circuit Design) — A7VK is available in both open‑ and closed‑circuit variants, enabling use in a broader range of hydraulic systems, including metering of viscous media or specialized fluids.

Parameter / Size A7VK‑12 A7VK‑28 A7VK‑55 A7VK‑107
Geometric Displacement, per rev (Vg_max) 11.6 cm³/r 28.1 cm³/r 54.8 cm³/r 107 cm³/r
Max Flow @ Vg_max, 1500 rpm 17.4 L/min 42.2 L/min 82.2 L/min 160.5 L/min
Max Flow @ Vg_max, 1800 rpm 20.9 L/min 50.6 L/min 98.6 L/min 192.6 L/min
Nominal Pressure (p_nom) 250 bar 250 bar 250 bar 250 bar
Maximum Pressure (p_max) 315 bar 315 bar 315 bar 315 bar
Required Case Drain Pressure (closed design) ≤ 6 bar
Approx. Weight (manual control) ≈ 11.7 kg ≈ 22.1 kg ≈ 31 kg ≈ 55 kg
Design Bent‑axis axial piston variable pump; open or closed circuit variants
Control Manual displacement control via handwheel (stepless) with position display & locking device
Applications Hydraulic systems, metering (e.g. polyurethane component metering), general industrial hydraulics, retrofit for A2VK applications