描述

Rexroth A4VSO Replacement Pump A4VSO40 A4VSO71 A4VSO125 A4VSO180 A4VSO250 A4VSO355

Core Components & Functions

The A4VSO family – including A4VSO40, A4VSO71, A4VSO125, A4VSO180, A4VSO250, and A4VSO355 – shares a rugged architecture.

• Rotating Group (Power Core) – This durable assembly comprises a hardened cylinder barrel, precision pistons, slipper pads, and a heavy‑duty shaft. Designed for 350 bar continuous service, its balanced construction reduces vibration, enabling high speeds and long life.

• Control Device (System Brain) – The pump’s intelligence comes from an integrated hydraulic servo that continuously adjusts the swashplate angle. Selectable modes – Pressure (HD), Flow (LV), or Constant Power (LR) – let the unit actively match circuit demands, rather than just deliver fixed flow.

• Hydraulic Architecture (Porting & Housing) – Internal passages are shaped for minimal pressure drop. The housing integrates galleries for pilot oil, case drain, and optional charge‑pump mounting – critical for high‑speed operation.

Efficiency & Compactness

The entire A4VSO line delivers outstanding total efficiency (volumetric + hydro‑mechanical), cutting energy use, cooling loads, and emissions. Its high power‑to‑size ratio offers more output per kilogram and per cubic inch than older designs – a major advantage in mobile and space‑limited industrial settings.

Application Example – Injection Moulding

An A4VSO125 with HD pressure control demonstrates smart energy use: it provides high flow for rapid clamp closing at low pressure, then automatically de‑strokes to maintain high clamp force with minimal flow during the hold phase. This on‑demand behaviour matches the load profile, saving 25‑40% energy compared to fixed‑displacement pumps that waste power over relief valves.

Built for Severe Duty

Forged from premium materials and using hydrostatic balancing at key wear interfaces (cylinder barrel‑port plate), the A4VSO series withstands continuous heavy loads. This reduces friction and wear even in mining, metal‑forming, and offshore applications – making it the go‑to choice for harsh environments.

Control Versatility

The pump’s real strength lies in its control options. Engineers can tailor it precisely: maintain constant flow for a coating roller (LV), limit input torque to protect an engine (LR), or accept electronic signals for Industry 4.0 (EL). This transforms any model – from the compact A4VSO40to the large A4VSO355 – into an adaptive, intelligent actuator.