PARKER-OLAER EHV Series: High-Pressure Hydraulic Accumulator for Industrial Applications

Store Energy. Stabilize Pressure. Enhance Performance.

In modern hydraulic systems, maintaining stable pressure, improving energy efficiency, and ensuring operational reliability are essential for achieving consistent equipment performance.

Pressure fluctuations, hydraulic shocks, and sudden changes in energy demand can affect system efficiency, accelerate component wear, and increase the risk of unexpected downtime.

The PARKER-OLAER EHV Series is a high-pressure bladder accumulator designed to support demanding hydraulic applications through energy storage, pressure stabilization, pulsation dampening, and shock absorption.

With its gas-charged bladder technology, the EHV Series provides a compact and responsive energy storage solution for industrial and mobile hydraulic systems.

1. What Is a Hydraulic Accumulator?

Understanding Hydraulic Energy Storage Technology

A hydraulic accumulator is a pressure vessel designed to store hydraulic energy by compressing gas, typically nitrogen.

This process allows hydraulic accumulators to support various system functions.

Main Functions of a Hydraulic Accumulator

• Hydraulic Energy Storage
• Pressure Stabilization
• Pulsation Dampening
• Hydraulic Shock Absorption
• Emergency Energy Supply

By performing these functions, hydraulic accumulators contribute to improved system stability, operational efficiency, and equipment reliability.

2. Introducing the PARKER-OLAER EHV Series

High-Pressure Bladder Accumulator Technology

The PARKER-OLAER EHV Series is a bladder-type hydraulic accumulator developed for high-pressure hydraulic applications.

It uses a flexible elastomeric bladder to separate compressed nitrogen gas from hydraulic fluid.

As hydraulic fluid enters the accumulator, the nitrogen gas is compressed, allowing energy to be stored.

The EHV Series offers different configurations to accommodate various hydraulic operating conditions and industrial requirements.

Main Components of the EHV Series

• Accumulator Shell
• Flexible Bladder
• Gas Valve
• Fluid Port Assembly
• Anti-Extrusion Protection

3. How Does the PARKER-OLAER EHV Accumulator Work?

Understanding the Working Principle of a Bladder Accumulator

The PARKER-OLAER EHV Series operates through three fundamental stages: pre-charging, charging, and discharging.

Stage 1: Pre-Charging

This initial pressure is commonly represented as P₀.

The correct pre-charge pressure depends on the accumulator application, operating pressure range, and temperature conditions.

Stage 2: Charging

As fluid enters, the bladder compresses and the nitrogen volume decreases.

The resulting increase in nitrogen pressure stores energy within the accumulator.

Stage 3: Discharging

The expanding gas pushes hydraulic fluid out of the accumulator and back into the hydraulic circuit.

The released fluid can help maintain system pressure, support actuator movement, or provide additional hydraulic flow.

Why Is Nitrogen Pre-Charge Pressure Important?

Correct nitrogen pre-charge pressure is essential for achieving the required accumulator performance.

An incorrect pre-charge setting can reduce usable fluid capacity, affect system response, and potentially shorten bladder service life.

4. Key Benefits of PARKER-OLAER EHV Series

Engineered for Demanding Hydraulic Applications

The PARKER-OLAER EHV Series provides several functional benefits for industrial hydraulic systems.

Improved Hydraulic Energy Efficiency

• Enhanced Pressure Stability

Hydraulic systems frequently experience pressure variations caused by changing loads, valve operation, and intermittent equipment movement.

The EHV accumulator helps compensate for these fluctuations, supporting more stable hydraulic operation.

• Hydraulic Shock Protection

Sudden changes in hydraulic flow can generate pressure spikes that place additional stress on system components.

A correctly selected accumulator can help absorb pressure surges and reduce dynamic pressure loads.

• Improved System Reliability

Reducing pressure fluctuations and hydraulic pulsations can contribute to more consistent equipment operation.

• Emergency Hydraulic Energy Backup

Emergency applications require appropriate engineering design, safety assessment, and system validation.

5. Parker OLAER EHV Series Technical Specifications

Designed for High-Pressure Hydraulic Systems

The PARKER-OLAER EHV Series is available in different configurations to meet specific operating requirements.

Certain EHV configurations are designed for high-pressure applications, with pressure ratings reaching up to 690 bar in the relevant product range.

• Important Engineering Considerations

Selecting the correct hydraulic accumulator requires evaluating several operating parameters.

• Operating Pressure

Determine the minimum and maximum system pressures and ensure the accumulator pressure rating is suitable.

• Required Fluid Volume
• Nitrogen Pre-Charge Pressure

Select the appropriate pre-charge pressure based on system requirements and operating conditions.

• Fluid Compatibility

Ensure the selected bladder and sealing materials are compatible with the hydraulic fluid.

• Operating Temperature

Consider the effects of temperature on gas pressure, bladder performance, and component service life.

6. Industrial Applications of PARKER-OLAER EHV Accumulators

Reliable Hydraulic Support Across Industries

PARKER-OLAER EHV Series accumulators can support a wide range of hydraulic applications where energy storage, pressure compensation, or pressure surge control is required.

• Manufacturing Equipment

Manufacturing equipment often operates with repetitive hydraulic cycles and fluctuating pressure requirements.

Potential applications include hydraulic presses, injection molding equipment, and automated production machinery.

• Mobile Hydraulic Equipment

Mobile machinery operates under changing loads and demanding environmental conditions.

Accumulators can support shock absorption, pressure stabilization, and selected energy storage functions.

Potential applications include excavators, construction equipment, and other mobile hydraulic machinery.

• Hydraulic Power Units

Hydraulic power units supply pressurized fluid to industrial hydraulic circuits.

Accumulators can be integrated into these systems to provide energy storage, pressure compensation, and supplemental hydraulic flow.

• Heavy Machinery

Heavy-duty industrial equipment may experience sudden pressure changes caused by rapid load variations.

Properly selected accumulators can help reduce hydraulic pressure surges and support system protection.

• Industrial Hydraulic Systems

The appropriate accumulator configuration depends on the specific operating conditions and system design.

7. Accessories for PARKER-OLAER EHV Series

Supporting Safe Operation and Maintenance

Selecting suitable accessories is essential for proper accumulator installation, operation, and maintenance.

Several types of accessories may be incorporated into EHV accumulator installations, subject to model compatibility and system requirements.

• Charging and Testing Unit

A charging and testing unit is used to check, adjust, and maintain nitrogen pre-charge pressure.

It allows qualified technicians to perform pressure measurements and gas charging using appropriate procedures.

• Safety and Shut-Off Block

These functions support safe accumulator operation and maintenance.

• Accumulator Mounting Clamps

Mounting clamps help secure the accumulator to machinery, structural frames, or hydraulic power units.

Correct mounting selection depends on accumulator dimensions, weight, orientation, and operating conditions.

• Replacement Bladder and Seal Kits

Compatible replacement bladders and seals support scheduled maintenance and component servicing.

Only suitable replacement components should be used.

• Pressure Gauges

Pressure gauges allow operators and technicians to monitor pressure at designated points in the hydraulic system.

Nitrogen pre-charge measurement requires suitable gas-side equipment and approved procedures.

Accessory Selection Note: Accessory availability and compatibility depend on the selected EHV accumulator model, operating pressure, connection type, and installation requirements.

8. Maintenance and Safety Recommendations

Keep Your Hydraulic Accumulator Performing

Regular inspection and proper maintenance help preserve accumulator performance and reduce operational risks.

• Check Nitrogen Pre-Charge Pressure
• Inspect for External Damage

Check the accumulator shell, mounting components, connections, and surrounding equipment for visible damage, corrosion, or leakage.

• Monitor Hydraulic System Performance

Observe unusual pressure fluctuations, changes in hydraulic response, and other indicators of possible accumulator performance issues.

• Follow Safe Maintenance Procedures

Remember that the nitrogen side may remain pressurized even after hydraulic pressure has been removed.

• Use Approved Replacement Components

Use compatible replacement bladders, seals, valves, and servicing equipment.

Important Safety Reminder

Use dry nitrogen only. Never use oxygen or compressed air for accumulator pre-charging.

Hydraulic accumulators are pressure vessels capable of storing significant energy.

9. Why Choose PARKER-OLAER EHV Series?

Reliable Hydraulic Energy Storage Technology

The PARKER-OLAER EHV Series offers several important advantages.

• Established Bladder Accumulator Technology

Uses compressed nitrogen and a flexible bladder to provide responsive hydraulic energy storage.

• High-Pressure Application Capability

Offers configurations suitable for demanding high-pressure hydraulic systems.

• Flexible Application Options

Different product configurations can support various industrial operating conditions.

• Maintenance and Service Support

Compatible accessories and replacement components can support proper maintenance.

• Engineering-Based Product Selection

With correct sizing, installation, and maintenance, the EHV Series can contribute to improved hydraulic performance and operational reliability.

10. Optimize Your Hydraulic Performance with PT Besttoflow System

Your Reliable Engineering Partner

Every hydraulic system has unique operating requirements.

Selecting the right hydraulic accumulator requires careful consideration of working pressure, fluid volume, operating temperature, duty cycle, and application requirements.

Our team is ready to assist with product information and technical consultation for PARKER-OLAER EHV Series hydraulic accumulators.

Contact Us

for product consultations, price quotations, or to discuss your hydraulic system requirements:

Address: Kawasan Pergudangan dan Industri Daan Mogot Eraprima Blok N.31, Tangerang

Phone: +62 21-55722531

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Email: sales@besttoflow.com