RexrothA4VSO40 Open Loop Hydraulic Piston Pump for Metallurgy, Mining and Heavy Industrial Machinery

     A4VSO40 350 bar High Pressure Constant Pressure Variable Pump for Hydraulic Power Unit & Industrial Press

Key Features

1. DR constant pressure control, stable pressure maintaining, fast control response

2. Nominal pressure: 350 bar; Max peak pressure: 400 bar

3. Displacement: 40 ml/r

4. Through shaft design, can connect additional pumps to form pump combination

5. Low noise, excellent suction performance, modular structure, easy maintenance

6. Drive shaft can bear axial & radial load; compatible with standard hydraulic oil

7. Cast iron housing, robust structure for heavy-duty continuous working

Technical Parameters

Specifications:

Application Scenarios

· Hydraulic power unit / Hydraulic station

· Industrial hydraulic press & forging machinery

· Metallurgical production equipment

· Mining auxiliary hydraulic system

· Test bench hydraulic system

· General heavy-duty stationary hydraulic drive

Competitive Advantage:

1. Equipped with DR pressure control mechanism, it can automatically maintain the set system pressure with small pressure fluctuation and good pressure holding performance. It is suitable for process scenarios requiring constant pressure, such as machine tools and small hydraulic stations. It automatically reduces flow after reaching the set pressure to save energy.
2. With 40cc small displacement and compact size, it takes up little installation space and is easy to integrate into small hydraulic power units. It runs with low vibration and low noise, suitable for long-time continuous operation of indoor industrial equipment and provides a better working environment.
3. It comes with a through-drive interface, which can be connected in series with other hydraulic pumps to realize combined oil supply. The core friction pairs are wear-resistant and reliable. Original and replacement spare parts are readily available in the market for easy maintenance and lower downtime cost.

The Analysis For Rexroth A4VSO Piston Pump Common Breakdown: 

1. Insufficient output flow and slow movement of actuators. Wear between pistons and cylinder block or scratched valve plate increases internal leakage, so the pump cannot deliver rated flow. It slows down the feeding speed of cylinders on machine tools and small hydraulic stations, extends processing cycle, and the problem is more obvious under heavy load.
2.  Abnormal noise and excessive vibration of pump body. The main causes are contaminated hydraulic oil, air entering suction pipeline and bearing wear. Impurities and cavitation continuously impact precision internal parts. Vibration and noise gradually worsen. Long-term operation accelerates pump core damage and may cause sudden seizure.
3. Failure of DR pressure control and unstable pressure regulation. Stuck DR control spool or fatigue failure of pressure regulating spring disables pressure holding function. The system pressure may keep rising or fail to build up, and stable pressure cannot be maintained, which directly affects the processing quality of procedures such as machine tool clamping and hydraulic tooling.