Variable piston pump A7V Series A7V 107/117/160/250/355/500 for engineering

Product Specification

Variable piston pump A7V Series A7V 107/117/160/250/355/500 for engineering machine

A7V series variable displacement piston pump - Product introduction

1, Product Overview

The A7V series is a Rexroth inclined axis variable axial piston pump, which is a benchmark product for heavy-duty, high-pressure, and high-power hydraulic systems. Renowned for its outstanding reliability, extremely high power density, and strong heavy-duty starting capability. This series of pumps is designed for open circuits and is widely used in important fields such as mining, metallurgy, shipbuilding, energy, building materials, and various large-scale engineering machinery.
The "inclined shaft" design of A7V pump (with an angle between its drive shaft and the cylinder axis, transmitting torque through mechanisms such as universal joints) enables it to have higher displacement and torque capacity compared to inclined disc pumps, as well as longer service life under harsh working conditions.

2, Core features and advantages

. Durable and long-lasting:
·Adopting heavy-duty bearing design, it has excellent impact load resistance and can withstand extremely high radial and axial forces.
·The sturdy shell structure and specially heat-treated core components ensure a long service life and high reliability under harsh working conditions such as pollution and vibration.

. Powerful overload startup capability:

·The inclined shaft structure gives it natural self-priming ability, ensuring sufficient oil suction even under cold start and low-speed conditions, without the need for an auxiliary pump (under specific operating conditions), which is a significant advantage over inclined disc pumps.

. Efficient variable mechanism:

·Provide multiple advanced forms of variable control, with fast response and high control accuracy.
·Common forms include:
·Constant power control (HD/EP control): Automatically adjusts the displacement to ensure that the output power of the pump does not exceed the set value, protects the prime mover from overloading, and fully utilizes the engine power.
·Pressure control (DR type/LA control): When the system pressure reaches the set value, the pump displacement automatically decreases to only compensate for leakage, achieving pressure holding standby and significant energy-saving effect.
·Electric proportional control (EL type): Flexible remote control is achieved by proportionally controlling the displacement through external electrical signals.
·Load sensitive control (LR type): automatically provides the required flow and pressure based on load requirements, resulting in high system efficiency.

4. High power density:

·Achieved a very large displacement (up to 1000 mL/r) and extremely high power output in a compact structural size.

5. High efficiency:

·The optimized design of the distribution plate and friction pair materials ensure high volumetric and mechanical efficiency throughout the entire working range, thereby reducing energy consumption and oil temperature.

6. Rich optional features:

-The booster pump (auxiliary pump) can be integrated to improve the oil suction condition of the main pump or provide oil source for the pilot control system.
-Multiple specifiions of flushing valves can be equipped, suitable for closed circuits, to help control oil temperature.- Technical parameters (typical values)Project parameter range/description
The displacement range is from 20 mL/r to 1000 mL/r (providing a wide range of options)
Rated working pressure up to 350 bar
Peak pressure up to 400 bar
The maximum speed depends on the displacement, usually reaching up to 2000-3000 rpm
Variable control methods include constant power (EP), pressure cutoff (LA), electric proportional (EL), load sensing (LR), constant pressure (CR), manual (MA), etc
Installation method: flange installation, in accordance with SAE or DIN standards
Shaft extension form: spline shaft (multiple specifiions), flat key shaft
Note: Please refer to the official technical sample of the selected model for specific parameters.
- Appliion Fields

The A7V pump is widely used in:

·Mining machinery: underground loader (LHD), rock drilling trolley, hydraulic breaker, coal mine comprehensive mining equipment.
·Metallurgical equipment: Steel furnace tilting device, rolling mill auxiliary equipment, scrap steel processing machine.
·Marine engineering: deck machinery (such as anchors and winches), servos, bow thrusters, and ship cranes.
·Energy equipment: wind power variable pitch system, oil drilling equipment.
·Construction machinery: large hydraulic excavators, rotary drilling machines, shield tunneling machines, asphalt pavers.
·Industrial field: large injection molding machines, die-casting machines, hydraulic presses.
Choosing A7V means choosing the maximum reliability, production efficiency, and lifecycle value for your core equipment.

Important Notice:

·The A7V series model code is complex, including various information such as displacement, control mode, shaft extension form, installation flange, rotation direction, etc.
·When selecting, repairing, or purchasing accessories, it is essential to provide complete nameplate information on the pump body to ensure absolute accuracy.

Company information

QUZHOU OUSTER HYDRAULIC Co., Ltd, founded in 2015 with more than 13 years export experience, specializes in procuring and selling hydraulic pumps and hydraulic pump parts.

Our main products include hydraulic pumps, hydraulic pump parts, hydraulic motors, gearboxes, and hydraulic valves. Our products have been exported to more than 68 countries worldwide.