Introduction of A11VO pump

The A11VO pump is a swashplate-type variable-displacement axial piston pump designed specifically for open-loop systems. It is widely used in mobile machinery such as excavators, cranes, and drilling rigs.

First, Key Parameters and Features

1. Pressure Rating: Nominal pressure is 350 bar, with a peak pressure of up to 400 bar, offering extremely high power density.

2. Size Range: Displacement ranges from 40 cc to 260 cc. Among these, high-displacement models such as the 190 and 260 can typically be equipped with an integrated impeller booster pump (model designation changes to A11VLO) to enhance self-priming capability and allow for higher drive speeds.

3. Through-shaft Drive: Supports 100% torque through-shaft drive, meaning you can connect piston pumps or gear pumps of the same specification in series to create multi-pump configurations.

Second, Flexible Control Modes

The core value of the A11VO lies in its diverse control mechanisms, which precisely match load requirements:

1. LR (Load-Regulated): Automatically adjusts displacement based on system pressure to ensure power consumption does not exceed engine limits.

2. DR (Constant Pressure): When system pressure reaches the set value, the pump automatically reduces displacement to maintain constant pressure.

3. HD (Hydraulic Control): Displacement is linearly adjusted in response to changes in pilot pressure.

4. EP (Electro-Proportional Control): Enables remote, precise regulation of pump displacement via a proportional solenoid.

Third, Key Technical Advantages

As the core power source for mobile machinery, the A11VO pump offers key technical advantages in high power density, excellent suction performance, and superior system compatibility:

1. Outstanding Suction and Self-Priming Capabilities

In high-displacement models (such as 190 and 260), the pump can be equipped with an optional built-in impeller booster pump (A11VLO). This design allows the pump to operate at higher speeds under self-priming conditions while reducing stringent requirements for tank mounting positions, effectively preventing cavitation at high speeds.

2. High Power Density and Pressure Resistance

High-Pressure Operation: With a rated pressure of 350 bar and peak pressures reaching 400–450 bar, it delivers greater torque in a smaller footprint, making it ideal for space-constrained mobile machinery.

Through-Shaft Drive: Supports 100% torque through-shaft drive, allowing the rear end to be connected in series with a piston pump of the same specification to achieve compact dual- or multi-pump configurations without the need for an additional power split box.

3. Precise and Dynamic Control Logic

The A11VO’s control mechanism supports external adjustment during operation. Through the LRDS control system (power control + pressure cut-off + load sensing), it ensures optimal utilization of engine power while providing flow-to-zero protection during system overload, significantly reducing system heat generation and energy consumption.

Elephant Fluid Power Technical team has over a decade of manufacturing experience and is now the largest manufacturer of hydraulic products in northern China, if you are interested in A11VO pumps, Please feel free to contact us at any time.

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