Hydraulic Piston Accumulators

Hydraulic piston accumulators are pressure vessels that contain hydraulic fluid at pressure, by use of a piston separating the fluid from a compressible gas; usually nitrogen.

How do they work?

Fluid Storage: Hydraulic fluid is pumped into the accumulator and compresses the gas behind the piston. 
Energy Storage: The compressed gas holds potential energy.
Energy Release: Once the hydraulic system needs fluid, the compressed gas expands to push the piston and force the stored fluid back into the system.   

Key Features:
 
High fluid volumes: This makes it suitable for storing high quantities of hydraulic fluid.   
High-pressure operation: Suitable for up to 1,000 bars in systems.   
Variable volume: The piston can be designed to accommodate a wide range of fluid volumes.   
Durable: It is robust in construction for demanding applications. 

Advantages:

Energy efficiency: It stores and recycles energy, with the resultant saving in energy consumption.   Improved system performance: It quickly responds to system demand.   Reduced wear and tear: It reduces pump and component stress.   Reduced noise: It dampens pressure pulsations and vibrations.   Applications:

Industrial machinery: Presses, injection molding machines, machine tools.   Mobile hydraulics: Construction equipment and farm-type machinery.   Automobile: Suspension and braking.   Aircraft: Flight control systems and landing gear.