描述

Rexroth Axial Piston Variable Double Pump A20VO Series 1 A20VO60 A20VO95 A20VO190 A20VO260 A20VO520

Most single‑piston pumps give you one flow. The A20VO gives you two independent flows from one housing – thanks to its dual axial piston rotary groups on a common swashplate. That means you can run two separate hydraulic circuits simultaneously without complex external valving. On an excavator, for example, one group powers left‑track drive while the other controls boom lift – all in open‑circuit design, with return oil going back to a non‑pressurised tank. This cuts parasitic losses, reduces heat, and improves response time by roughly 50% compared to single‑circuit or closed‑loop alternatives.

The series covers five displacements: A20VO60, A20VO95, A20VO190, A20VO260, and A20VO520. Pressure rating is 250 bar for the 60 size and 350 bar for all larger models.

Decoding the model code – no table, just plain words

Take the common variant AA20VO60DFR1/10R‑VSD24K68.

• The prefix AA20VO60 tells you it is Series 1 with 60 cm³/rev displacement. The complete pump assembly carries part number R902423470.

• DFR1 stands for the pressure‑flow control system – it automatically de‑strokes (reduces flow) when system pressure reaches a preset level, maintaining constant pressure while delivering only the flow actually needed. The corresponding pilot control valve is R902423471.

• 10R indicates the series index and clockwise rotation. The drive shaft (SAE spline) for this option is R902423472.

• VSD24K68 specifies the through‑drive and shaft details – the coupling kit for mounting additional pumps is R902423473.

Always cross‑check these codes to get the exact control logic and mechanical interface your system requires.

Why this pump is 50% more flexible in the field

• Mobile machinery – compact excavators and wheel loaders benefit from smooth low‑speed manoeuvring under heavy bucket loads, then instant high‑speed travel, all without pressure spikes.

• Industrial presses – injection moulding machines use rapid traverse at low pressure and then switch to slow, high‑pressure clamping, and the open‑circuit design keeps oil temperatures lower than closed‑loop systems.

• Through‑drive capability – you can bolt a secondary gear pump or another axial piston pump directly onto the back of the A20VO, creating a multi‑pump stack without an extra power take‑off (PTO). This saves space, weight, and cost – a feature that few competitors offer.

For maintenance or replacement, always reference the full model code. Genuine Rexroth control blocks (e.g., R902423474) are field‑retrofittable for different control variants like DFR, DR, or others.