A10VSO 18 DFR/31R-PUA12N00 Hydraulic piston pump

A10VSO 18 DFR/31R-PUA12N00 Hydraulic piston pump

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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Product details

A10VSO18DFR/31R-PUA12N00 Hydraulic Piston Pump

TheA10VSO18DFR/31R-PUA12N00is an axial piston variable-displacement pump manufactured byBosch Rexroth, designed for high-performance hydraulic systems. Below is a detailed overview of its structure, specifications, applications, and maintenance guidelines:

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I. Basic Structure & Working Principle

1. Axial Piston Design

• Features an axial piston configuration where pistons reciprocate parallel to the cylinder block's central axis, ensuring high volumetric efficiency through precise alignment.

2. Variable-Displacement Pump Characteristics

• As a variable open-circuit pump, its displacement can be infinitely adjusted by varying the swashplate angle, enabling proportional flow output relative to pump speed and displacement.

3. Swashplate Mechanism

• Swashplate-type axial piston pump designed for open hydraulic circuits, offering excellent self-priming capabilities.

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II. Technical Specifications & Performance

【表格】

Parameter Description

Displacement 18 mL/rev (moderate displacement suitable for diverse hydraulic demands)

Pressure Ratings Continuous operating pressure: 280 bar; Peak pressure: 350 bar

Speed Range Typically 500–3,600 rpm (adjustable based on application requirements)

Drive Options Compatible with electric motors, engines, or variable-frequency drives (VFDs)

Control Mechanism DFR control enables precise regulation of flow and pressure for complex operating conditions. Short control response time ensures rapid adaptation to system changes, maintaining stability and accuracy.

Sealing High-quality sealing materials ensure reliable performance under high-pressure/temperature conditions.

Mounting Flange-mounted (ISO standard) with SAE metric flange compatibility for flexible replacement.

Multi-Circuit Capability Through-shaft design supports multi-circuit systems, enhancing integration efficiency.

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III. Applications

1. Construction Machinery

• Serves as the main pump in excavators, loaders, and other heavy equipment, providing stable and reliable power.

2. Marine Hydraulic Systems

• Delivers high-pressure oil flow to drive steering gear, hoisting mechanisms, etc., with a high power-to-weight ratio and excellent continuous duty capability.

3. Injection Molding Machines

• Enables high-pressure injection and rapid cycling for precise hydraulic actuation.

4. Other Industrial Equipment

• Ideal for presses, fan drives, and applications requiring high flow/pressure or precise flow control (e.g., industrial hydraulic systems).

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IV. Operation & Maintenance

1. Pre-Startup Preparation

• Fill the pump casing with clean working oil via the return port before startup to prevent damage.

2. Pump Shaft Rotation Direction

• The shaft must rotateclockwise(viewed from the shaft end). Specify counterclockwise rotation or motor use during ordering if required.

3. Casing Pressure

• The pump casing is rated for pressures up to0.05 MPa. Avoid overly narrow return lines to ensure smooth oil flow back to the tank.

4. Hydraulic Fluid Selection

• Recommended fluids: Domestic32# or 46# hydraulic oil, or E50=3-5 viscosity index >90 hydraulic oil. Maintain operating temperatures between10–65°C.

5. Regular Maintenance

• Replace hydraulic oil every1,000–3,000 operating hoursor six months to preserve system performance.

• Periodically inspect seals, bearings, and other wear-prone components, replacing them as needed.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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Address: Ningbo, China

Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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