Rexroth A30VG 2-circuit axial piston variable hydraulic pump

The A30VG series 10 is a swashplate-design axial piston variable pump built by Bosch Rexroth for closed-circuit hydrostatic travel drives. Unlike a conventional single-circuit variable pump, the A30VG houses two synchronously variable circuits in one compact body, each delivering 28 cm³ per revolution, along with an integrated boost pump.

That "2-circuit" designation isn't just a spec sheet detail — it's the entire point of the design. By running two separate, precisely matched flows off a single common control, the pump can function as a hydraulic differential lock, splitting torque between two hydrostatic motors (typically wheel motors) without the efficiency losses that come from a mechanical flow divider.

Why the Dual-Circuit Design Matters

Most axial piston pumps in mobile hydraulics move fluid through a single circuit, and if a machine needs two independent drive circuits, manufacturers historically bolted on a second pump or relied on a mechanical flow divider. Both approaches add weight, length, and — critically — parasitic losses.

The A30VG sidesteps that by putting two variable circuits inside one housing, controlled together. The practical result is that both circuits stay synchronized without a flow divider stealing efficiency, and the pump still fits in a 300 mm installation envelope, which Rexroth positions as best-in-class for this displacement class.

Typical Applications

Based on Rexroth's own application guidance, the A30VG series 10 shows up most often in:

Wheel drives paired with a mechanical differential lock or series motor control

Roller drives, including compact and tandem road rollers

Articulated machines with single-wheel drives are common in modern municipal and construction equipment

Synchronous working drives in closed circuits where efficiency requirements are high

If your machine falls into one of these categories and currently uses a flow divider or two separate pumps to manage dual circuits, the A30VG is worth a second look during your next redesign cycle.

Selecting and Specifying an A30VG

A few practical points worth confirming before ordering or swapping in an A30VG:

1. Confirm the control type you need. EP (proportional electric) suits machines already wired for electronic control; HW (proportional hydraulic, mechanical servo) suits simpler mechanical linkages.

2. Check shaft and flange compatibility. The pump uses SAE J744 flange mounting and is available with either a 1 1/4 in or 1 3/8 in drive shaft — match this to your prime mover's PTO or engine coupling.

3. Verify pressure margins for your duty cycle. With a 300 bar nominal rating and 350 bar maximum, make sure your peak working pressure — including transient spikes during hard direction changes — stays within that ceiling.

4. Don't treat the two circuits as interchangeable with two separate pumps. Because both flows share a common control, sizing decisions (motor displacement, wheel diameter, etc.) need to keep both circuits balanced, or the differential-lock behavior won't work as intended.

For more information on the A30VG hydraulic pump, please visit https://www.baolilaihydraulic.com/product/.

Specifications

Selection Table

Q1: What size machines typically use the A30VG?

A1: Its compact 28 cm³ displacement and ~300 mm installation length make it a fit for smaller-to-midsize equipment — compact road rollers, municipal vehicles, and construction machines with wheel or roller drives — rather than heavy earthmoving equipment needing much larger displacement pumps.

Q2: Does the A30VG include boost pressure and overload protection?

A2: Yes. It has an integrated boost pump, and each circuit is fitted with two pressure relief valves that also function as boost valves, protecting the transmission from overpressure.

Q3: How to purchase an A30VG hydraulic pump?

A3: You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.

Q4: What is the price and delivery time of the A30VG hydraulic pump?

A4:The specific price and delivery time will be provided based on the specific model you provide.