A4VSO180EO2/30R-PPB13N00 A4VSO180EO1/30R-VPB25N00
A4VSO180EO1/30R-VZB13N00 A4VSO180LR2G/30R-VZB13N00
A4VSO180LR2G/30R-VPB25N00 Industrial variable high-pressure pump
A4VSO180, German Rexroth piston
Industrial variable high-pressure pump A4VSO180 series from
Rexroth, featuring German-engineered piston technology for
demanding hydraulic appliions.
Frequently Asked Questions
1. What is the fundamental working principle of the A4VSO series
pump?
The A4VSO series is a swashplate-type axial piston pump designed
for open-circuit systems. Its flow output is proportional to the
input drive speed and its displacement volume. The displacement is
infinitely variable by adjusting the angle of the swashplate. It's
known for its excellent suction characteristics, low noise, long
service life, and high power-to-weight ratio. Multiple control
options are available to meet various system requirements.
2. What are the common control methods for the A4VSO pump?
The A4VSO series offers a wide range of variable control methods.
The most commonly used include: DR/DRG (Pressure Control), LR
(Constant Power Control), EO/EO2 (Electroproportional Control).
Other available controls include FR (Flow Control), MA (Manual
Control), EM (Electric Motor Control), HW/HM/HS/HD (Various
Hydraulic Controls), and DS (Secondary Control for speed sensing).
3. How does the DR Pressure Control (Pressure Cut-Off) work?
The DR control maintains a constant system pressure by changing the
swashplate angle. When the system pressure reaches the spring-set
value on the DR valve, the control mechanism acts to reduce the
pump's displacement, delivering only the flow required to maintain
the set pressure. A system safety valve is still essential because
the DR control's response is relatively slow compared to sudden
pressure shocks.
4. What is the difference between DRG and DP control types?
Both DRG and DP are forms of constant pressure control, but they
are designed for different appliions. DRG allows the pressure
setpoint to be adjusted remotely via an external pressure control
valve. DP is specifically designed for systems where multiple pumps
work in parallel, containing an additional element that
mechanically links to the swangle to ensure pumps share the load
equally.
5. Why might multiple A4VSO DR pumps in parallel cause system
vibration?
When multiple pumps with standard DR controls are set to the same
pressure, slight inherent differences in their response
characteristics can cause them to not reduce displacement at
exactly the same time and rate. This lack of synchronization can
lead to interactions between the pumps, resulting in pressure
fluctuations and potentially causing severe pipeline vibration.
6. What are the key specifiions of the A4VSO series?
Common Displacement Specifiions: 40, 71, 125, 180, 250, 355, 500,
750 ml/rev. Nominal Pressure: 350 bar. Peak Pressure: 400 bar.
Features a specially designed, long-life, high-precision full
roller bearing and through-shaft design for multi-pump
configurations.
7. What should be considered during commissioning and adjustment?
Key considerations include: proper alignment (3-5 mm coupling gap),
filling & venting procedures, correct rotation direction verifiion,
appropriate minimum flow setting, and for DP controls, proper
pressure differential setup (typically 33 bar standard sum).
8. In which industries are A4VSO pumps commonly applied?
A4VSO pumps are widely used in high-pressure, heavy-duty industrial
appliions including: ceramic presses, refractory material presses,
steel and forging equipment, metallurgical machinery, mining
machinery, marine machinery, petroleum equipment, engineering
machinery, and machine tools.
German Rexroth Industrial High-Pressure Hydraulic Gear Pump 280 Bar with Original Packaging
