Rexroth Piston Pump A4VTG090EP3P0 A4VTG090EP3PT A4VTG090EP3PT A4VTG090EP4P0 A4VTG090EP4PT A4VTG090HW100 A4VTG090HW10T

Defining Specifications: A Data‑Driven Profile

• Nominal Displacement: 90 cm³/rev – the baseline measure of fluid delivery per revolution.

• Pressure Ratings:

  • Continuous operating pressure: 350 bar (5,076 psi) – the sustained working level for reliable long‑term duty.

  • Peak pressure: 400 bar (5,802 psi) – the maximum allowable for intermittent high‑force events, providing a safety margin against pressure spikes.

• Speed Range: Up to 2650 rpm (depending on configuration) – defines the permissible input speed, directly affecting maximum flow output.

• Integrated Control Options:

  • DA control – pressure cut‑off for simple, effective pressure limitation.

  • LR control – load‑sensing for energy‑optimised flow matching to actual demand.

  • LRC control – torque limitation to protect the prime mover by capping absorbed power.

Operational Advantages: Why the A4VTG090 Is Chosen

1. Demand‑Driven Efficiency through Variable Displacement
   Unlike fixed‑displacement pumps that continually deliver full flow (much of which is dumped over a relief valve, generating heat), the A4VTG090 adjusts its output volumetrically to match instantaneous system needs. Its load‑sensing capability cuts energy use, lowers oil temperatures, and extends component life – especially valuable in mobile machines where fuel savings and reduced emissions are direct benefits.

2. Built for Tough Service
   Manufactured with hardened alloy steels, finely ground mating surfaces, and heavy‑duty bearings, this pump withstands high‑cycle operation, shock loads, and contaminated environments typical of construction, agriculture, and forestry. The design emphasises long mean time between failures (MTBF) and predictable maintenance intervals.

3. System Integration via Versatile Controls
   The pump acts as the intelligent core of the hydraulic circuit. By choosing the appropriate control (DA, LR, LRC, or combinations), engineers can tailor the pump’s response to pressure, flow, or torque requirements, enabling seamless, automated coordination with valves, actuators, and machine controllers – simplifying overall system design.

4. High Power Density in a Small Package
   The A4VTG090 delivers substantial hydraulic power relative to its size. This allows equipment designers to fit powerful hydraulics into tight spaces – a crucial advantage in modern compact machinery where every centimetre counts.

Application Landscape: Ideal Use Cases

The A4VTG090 is the hydraulic power source of choice for applications demanding a combination of robust output, intelligent regulation, and field‑proven reliability.

• Mobile Off‑Highway Equipment – Its primary domain. It provides responsive, efficient power for excavators, wheel loaders, telescopic handlers, and forestry cranes. The load‑sensing option enables smooth, precise, fuel‑saving operation in these machines.

• Industrial Machinery – Where precision and repeatability are essential, such as in plastic injection moulding machines, hydraulic presses, and material test rigs. The pump’s accurate pressure and flow control ensures consistent process quality and cycle stability.

• Specialised Material Handling – Used in large container handlers, port equipment, and heavy‑duty forklifts that endure rapid, severe load cycles. The pump’s ruggedness and rapid response are key benefits in these demanding roles.

Illustrative Case: An Excavator’s Hydraulic Heart

Consider a 20‑tonne excavator fitted with an A4VTG090 using LR (load‑sensing) control. During a fine‑grading task, the operator makes subtle joystick movements. The pump’s control system detects low flow demand and immediately reduces the swashplate angle to near‑minimum displacement, delivering only enough oil for smooth, accurate cylinder movement with minimal engine load. When the operator suddenly commands full‑force digging, the system pressure drop triggers the pump to instantly swing to maximum displacement, providing full hydraulic power to the cylinders without hesitation or wasteful overflow. This instant adaptation – from near‑zero to full output and back – is exactly what gives the machine both its performance edge and its fuel economy.