Concentric Hydraulic Pumps: Advanced Solutions for Industrial Applications

Concentric Hydraulic Pumps

Advanced hydraulic solutions engineered for precision, reliability, and optimal performance in demanding industrial environments

Introduction to Concentric Hydraulic Pumps

Concentric hydraulic pumps are at the heart of modern industrial machinery, providing the precise fluid power needed to drive critical operations. These pumps are designed with precision-engineered components that ensure optimal performance, efficiency, and durability in even the most demanding environments.

The unique design of concentric hydraulic pumps features a rotating group within a stationary housing, creating a compact and efficient solution for transferring hydraulic energy. This design minimizes energy loss and reduces heat generation, making concentric pumps an ideal choice for applications requiring high power density and reliability.

High Efficiency

Optimized design reduces energy consumption

Compact Design

Space-saving solution for diverse applications

Low Noise

Quiet operation for industrial environments

Long Lifespan

Durable construction ensures reliable performance

Concentric hydraulic pump in industrial machinery

Concentric hydraulic pump in industrial machinery

Technology & Design

Concentric hydraulic pumps leverage advanced engineering principles to deliver superior performance and reliability

Precision Engineering

Every component of a concentric hydraulic pump is precision-engineered to exacting standards, ensuring optimal clearances and minimal internal leakage.

  • High-precision gears and bearings
  • Advanced metallurgy for wear resistance
  • Tight tolerances for efficient operation

Performance Capabilities

Concentric pumps are designed to deliver consistent performance across a wide range of operating conditions, with high pressure capabilities and variable flow rates.

  • Pressures up to 350 bar (5,000 psi)
  • Displacement options from 0.5 to 200 cc/rev
  • High-speed operation with minimal vibration

Energy Efficiency

Advanced design features minimize energy losses, making concentric hydraulic pumps an environmentally friendly choice for industrial applications.

  • Low internal leakage for reduced power consumption
  • Efficient fluid flow paths
  • Optional variable displacement configurations

How Concentric Hydraulic Pumps Work

Concentric hydraulic pumps operate on the principle of positive displacement, using rotating elements to move fluid from the inlet to the outlet. The pump's design ensures smooth, continuous flow with minimal pulsation.

The rotating group consists of a drive gear and one or more idler gears, all precisely positioned within the pump housing. As the gears rotate, they create expanding cavities at the inlet, drawing fluid into the pump. The fluid is then carried around the circumference of the gears and forced out through the outlet as the cavities contract.

Inlet Stage

Fluid enters the pump through the inlet port as the gears separate

Transfer Stage

Fluid is carried between the gear teeth and the pump housing

Outlet Stage

Fluid is forced out through the outlet port as the gears mesh

Internal components of a concentric hydraulic pump

Internal components of a concentric hydraulic pump

Applications & Industries

Concentric hydraulic pumps are used in a wide range of industrial applications where reliable fluid power is essential

Industrial Machinery

Powering presses, injection molding machines, conveyors, and other industrial equipment where precise control and high force are required.

  • Metal forming and fabrication
  • Plastic processing machinery
  • Material handling systems

Mobile Equipment

Providing power for construction equipment, agricultural machinery, and commercial vehicles, enabling efficient operation in demanding environments.

  • Excavators and loaders
  • Farming and forestry machinery
  • Material handling vehicles

Marine & Offshore

Supporting critical systems on ships, offshore platforms, and underwater equipment, where reliability in harsh conditions is paramount.

  • Steering and winch systems
  • Deck machinery and cranes
  • Subsea control systems

Construction

Enabling the operation of hydraulic tools, lifts, and heavy machinery used in building and infrastructure development.

  • Concrete pumps and mixers
  • Hydraulic breakers and drills
  • Elevators and hoists

Energy & Utilities

Supporting power generation, transmission, and distribution systems, including wind turbines, hydroelectric plants, and pipeline control.

  • Turbine control systems
  • Valve actuation for pipelines
  • Power plant auxiliary systems

Specialized Applications

Providing precise fluid power for critical applications in aerospace, defense, medical equipment, and renewable energy systems.

  • Aerospace ground support equipment
  • Medical imaging and surgical devices
  • Renewable energy systems

Performance Specifications

Concentric hydraulic pumps are engineered to meet the highest standards of performance and reliability

Standard Performance Metrics

Maximum Operating Pressure 350 bar (5,000 psi)
Displacement Range 0.5 - 200 cc/rev
Speed Range 500 - 3,000 RPM
Efficiency Rating Up to 94%
Noise Level ≤ 75 dB(A)

Technical Specifications

Fluid Compatibility

  • Mineral oils
  • Synthetic hydraulic fluids
  • Biodegradable fluids

Temperature Range

  • Standard: -20°C to +80°C
  • High temp: Up to +120°C
  • Cold start: Down to -40°C

Mounting Options

  • SAE flange mounts
  • ISO standard mounts
  • Custom configurations

Shaft Options

  • Splined shafts
  • Keyed shafts
  • Hollow shafts

Performance Comparison

Specification Concentric Pumps Gear Pumps Vane Pumps
Maximum Pressure 350 bar 250 bar 210 bar
Efficiency Up to 94% 85-90% 80-88%
Noise Level ≤ 75 dB(A) 70-85 dB(A) 65-75 dB(A)
Viscosity Range 10-1,000 cSt 15-400 cSt 20-200 cSt
Contamination Resistance High Medium Low
Maintenance Requirements Low Medium High

Selecting the Right Concentric Hydraulic Pump

Choosing the appropriate pump for your application is critical to achieving optimal performance and reliability

Key Selection Criteria

1

Flow Rate Requirements

Determine the required flow rate based on the application's operational needs, considering factors such as cylinder size, actuator speed, and system efficiency.

2

Pressure Requirements

Consider the maximum pressure the system will need to operate at, including any peak loads or pressure spikes that may occur during normal operation.

3

Fluid Compatibility

Ensure the pump materials are compatible with the hydraulic fluid being used, including considerations for temperature, viscosity, and chemical composition.

4

Mounting and Shaft Configuration

Select the appropriate mounting style and shaft configuration to ensure compatibility with your drive system and installation space constraints.

5

Environmental Conditions

Consider the operating environment, including temperature extremes, humidity, vibration, and exposure to contaminants or corrosive substances.

Concentric Pump Sizing Guide

Use this guide to estimate the appropriate pump size for your application. For precise calculations, consult with our technical experts.

This is a simplified guide. Actual pump selection should be based on a comprehensive system analysis.

Maintenance & Service

Proper maintenance ensures optimal performance and extends the lifespan of your concentric hydraulic pump

Regular Maintenance Schedule

  • Daily: Check fluid level and inspect for leaks
  • Weekly: Monitor system pressure and temperature
  • Monthly: Inspect pump mounting and drive coupling
  • Quarterly: Replace filters and check fluid condition
  • Annually: Comprehensive inspection and service

Troubleshooting Guide

  • Low flow: Check for blockages or pump wear
  • High noise: Inspect for cavitation or misalignment
  • Overheating: Check fluid viscosity and cooling system
  • Excessive vibration: Verify proper mounting and balance
  • Fluid contamination: Replace filters and fluid

Service Tips

  • Use genuine replacement parts for repairs
  • Follow proper fluid change intervals
  • Keep pump and system clean during maintenance
  • Monitor pump performance for early signs of wear
  • Train personnel in proper maintenance procedures

Fluid Maintenance Best Practices

The hydraulic fluid is the lifeblood of your system. Proper fluid maintenance is critical to ensuring long pump life and reliable operation.

Regular Fluid Analysis

Schedule regular fluid analysis to monitor contamination levels, viscosity, and additive depletion

Proper Filtration

Use high-quality filters with appropriate micron ratings and change them at recommended intervals

Temperature Control

Maintain proper fluid temperature to prevent oxidation and viscosity changes

Fluid Replacement

Replace hydraulic fluid according to manufacturer recommendations or fluid analysis results

Hydraulic pump maintenance procedure

Hydraulic pump maintenance procedure

Need a Custom Hydraulic Solution?

Our team of hydraulic experts can help you select the perfect concentric pump for your specific application or develop a custom solution tailored to your needs.

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