These devices are not just energy storage units. They serve as a safety buffer, a shock absorber and a tool to improve overall system efficiency. But with several types of accumulators available, each suited to different applications, choosing the right one can be challenging.
At DURAfilter, we work with trusted original equipment manufacturers to offer a complete line of high-performance accumulators. In this guide, we break down the different types of hydraulic accumulators, explain their unique features and help you understand which one fits your system best.
What Is a Hydraulic Accumulator and Why Do You Need One?
A Hydraulic Accumulator stores energy in the form of pressurized fluid. This energy can be released when needed, helping to maintain system pressure, absorb shock loads and compensate for fluid losses. Without an accumulator, hydraulic systems are more prone to pressure spikes, component fatigue and inefficient energy usage.
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Whether you are operating construction equipment, marine systems or factory machinery, incorporating the right accumulator helps keep everything running smoothly. It can be the difference between costly downtime and seamless operation.
Understanding Accumulator Types and Their Functions
- Bladder Accumulators: Fast Response and Easy Maintenance
Bladder accumulators are one of the most commonly used types in the industry. They consist of a rubber bladder housed inside a pressure vessel. This bladder separates hydraulic fluid from a pre-charged gas, typically nitrogen.
One of the key benefits of bladder accumulators is their rapid response to pressure changes. They react almost instantly, making them ideal for systems where sudden pulsations or pressure spikes are a concern.
At DURAfilter, we supply high-quality bladder accumulators designed to deliver consistent performance in both high and low-pressure environments. These units are constructed from high-strength steel and feature a durable nitrile rubber bladder with options for high-temperature Viton. Stainless steel and anti-corrosive ports ensure reliability even in demanding conditions.
Key Features:
- Quick reaction time for pulsation damping
- Simple to install and maintain
- Gas and oil separation to reduce leakage
- High-pressure performance with minimal energy loss
Common Applications:
- Energy storage in mobile hydraulics
- Damping of pump pulsations
- Volume compensation during system changes
- Emergency power backup in case of failure
- Piston Accumulators: Precision Control for Demanding Systems
Piston Pccumulators operate using a free-floating piston that separates the gas from the hydraulic fluid. These accumulators are highly customizable and work well in systems requiring large volume storage or high flow rates.
We offer piston accumulators from trusted names like Bolenz and Eppensteiner. These units are built for precision and reliability. They are ideal for operations that run continuously or need exact pressure control.
Because piston accumulators can handle higher compression ratios and are less prone to gas permeation, they are well suited to long-term operation with minimal maintenance. Their rugged carbon steel or stainless steel housings also make them perfect for harsh industrial environments.
Key Features:
- Supports high flow rates and large volume storage
- Designed to meet international safety standards
- Optional sensors and valves for precise monitoring
- Custom sizing available for unique applications
Common Applications:
- Pressure surge protection
- Shock absorption in heavy machinery
- Thermal expansion compensation
- Flow balancing in hydraulic circuits
- Diaphragm Accumulators: Compact Design for Tight Spaces
When space is limited or fast response is essential, Diaphragm Accumulators are often the best choice. These devices use a flexible diaphragm to separate gas from fluid. They are compact, efficient and ideal for applications where size and weight matter.
DURAfilter provides several types of diaphragm accumulators including welded, forged and screwed models. All of them are built to meet strict quality standards and perform reliably across a range of operating conditions.
Because of their compact design and low maintenance requirements, diaphragm accumulators are widely used in both mobile and fixed equipment where frequent system cycling and rapid pressure changes occur.
Key Features:
- Rapid response to pressure fluctuations
- Suitable for high and low-pressure systems
- Durable materials withstand harsh conditions
- Minimal maintenance and long lifespan
Common Applications:
- Pressure stabilization in mobile hydraulics
- Buffering and surge suppression
- Thermal expansion and leak compensation
- Pulsation damping in compact systems
Working with the Right Partners
To ensure quality and performance, DURAfilter partners with some of the most respected brands in the hydraulics industry.
Roth Hydraulics (Bolenz and Schäfer)
With over 70 years of experience, Roth Hydraulics has built a reputation for engineering durable and efficient accumulators. Formerly known as Bolenz and Schäfer, their products are used globally in applications where reliability cannot be compromised. These accumulators are known for reducing maintenance needs and extending system life, particularly in demanding environments.
EPE
EPE brings over 35 years of hydraulic expertise to the table. Known for their fast delivery and precision-engineered solutions, EPE accumulators are ideal for both industrial and mobile use. Their bladder accumulators are particularly popular for their durability and certified performance under high-pressure conditions.
Choosing the Right Accumulator: What to Consider
When selecting an accumulator, several factors should be considered beyond just pressure rating or size. Ask the following:
- How quickly does the system need to respond to pressure changes?
- Is the available space limited?
- Will the system be operating continuously or intermittently?
- Are there extreme temperatures or corrosive materials present?
- What are the maintenance and inspection requirements?
Bladder types are excellent for systems requiring quick response. Piston types offer better capacity for larger volumes and tighter control. Diaphragm types work best in compact installations with rapid cycling.
Why Choose DURAfilter?
DURAfilter is a leading manufacturer, distributor and repair specialist of high-quality hydraulic components and systems, proudly serving the North American hydraulic industry for over 30 years. Our expertise spans across the design, engineering, sales and service of a wide range of hydraulic products, including hydraulic accumulators, filters, pumps, motors and various hydraulic accessories.
Final Thoughts
Hydraulic accumulators are not one-size-fits-all components. The right choice depends on your system’s dynamics, space constraints and performance goals. At DURAfilter, we combine deep product knowledge with reliable brands to ensure that your system operates smoothly and efficiently.
If you need help choosing the right accumulator or want advice on sizing or installation, our team is here to help.