Hydraulic Accumulators: Energy Reserves for Hydraulic Systems

What is a Hydraulic Accumulator Used For?

A hydraulic accumulator is a pressure vessel designed to store hydraulic energy. It works based on the compressibility of gas (typically nitrogen). When pressure rises in the system, oil flows into the accumulator, compressing the gas. When pressure drops, the gas expands and pushes the oil back into the system.

The "Hydraulic Accumulators" category at Hidraulika Store offers solutions for the three most important functions:

1. Energy Storage: Acts as an emergency power source (e.g., during power failure) or assists the pump during peak demand.

2. Shock Absorption: Dampens "water hammer" (pressure spikes) caused by rapidly closing valves or cylinders, protecting pipes and seals.

3. Suspension: Absorbs vibrations in mobile machinery (e.g., the boom of a front loader), ensuring smoother operation and longer machine life.

Types: Bladder and Diaphragm Accumulators

The most important factors in selection are capacity and response time.

• Bladder Accumulators: In these, a replaceable rubber bladder separates the gas from the oil. Available in larger volumes (up to 50 liters), they are robust and less sensitive to contamination. Their major advantage is repairability: if the bladder fails, you don't need to discard the whole vessel, just replace the bladder. Our standout product is the reliable Hydraulic Accumulator - Bladder Type - 10 Liter - AS 360 - EPE, known for its excellent value and universal applicability.

• Diaphragm Accumulators: Smaller in size, utilizing a fixed diaphragm for separation. Due to their extremely fast response time, they are excellent for dampening pressure spikes and protecting sensitive instruments. They are non-repairable; if they fail, they must be replaced.

Explore our full hydraulic accumulator selection to find the size and type that fits your system!

Safety and Installation: Safety Blocks and Mounting

Since these devices store high-pressure gas, safety is critical. It is recommended (and often mandatory) to use a safety valve or a complete safety block for every installation. The safety block allows for the safe discharge and isolation of the accumulator from the system during maintenance. For physical mounting, we offer clamps and accumulator brackets with vibration-damping inserts to prevent the vessel from coming loose.

Maintenance and Charging

The soul of a hydraulic accumulator is the nitrogen pre-charge pressure (p0). If the gas escapes, the accumulator loses its function, and the bladder/diaphragm can be damaged. A universal charging kit is essential for regular checks and recharging.

Why Choose Hidraulika Store?

We stock the most common EPE, Parker, and Hydac compatible parts. Our experts help not only in selecting a new unit but also advise on setting the correct nitrogen pre-charge pressure, which is the secret to long service life. Discover our full range of services and products on the hidraulikastore.com homepage!

Frequently Asked Questions

• Can I fill the accumulator with air? FORBIDDEN and DANGEROUS! Strictly fill only with pure nitrogen (or other inert gas). Compressed air contains oxygen, which, when mixed with oil mist under pressure, can cause an explosion (diesel effect).

• What pressure should the accumulator be charged to? This depends on the application. For energy storage, it is generally 90% of the minimum operating pressure; for shock absorption, 60-80% of the system operating pressure is recommended. Always refer to the machine's manual or hydraulic schematic.

• How do I know if the bladder is ruptured? If the system feels "hard," jerks, suspension is lost, or oil flows out of the gas side through the charging valve, the bladder or diaphragm is certainly damaged.