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Bladder Accumulators Parker's hydro-pneumatic bladder accumulators provide a means of regulating the performance of a hydraulic system. Their simple, compact, design ensures dependable performance, maximum efficiency and long service life.
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Piston Accumulators Parker's hydraulic accumulators for industrial and mobile applications provide a means of regulating the performance of a hydraulic system. They are suitable for storing energy under pressure, absorbing hydraulic shocks and damping pump pulsation and flow fluctuations. Their simple, compact, design ensures dependable performance, maximum efficiency and long service life.
Parker's piston accumulators are manufactured in compliance with the European Pressure Equipment Directive 97/23/EC (PED) and carry the CE mark where applicable. Other approvals are available on request.
Parker offers the A Series range of piston accumulators for mobile applications such as damping and ride control. For industrial applications, A Series and AP Series accumulators are offered to suit different application and performance criteria.
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BLADDERTECHNOLOGY :
> Prevents disassembly while under pressure
> Instantaneous response time
> Wide range of materials, elastomers, coatings
> Adaptation low and high températures
> Adaptation to the différent fluids
> Wide pressure range
> Elastomers hâve very high grade of impermeability
> Horizontal or vertical installation
> Adaptable high flowfluid ports
> Flanged fluid ports for connection to manifold block
> Adaptable into transfert System
DIAPHRAGM TECHNOLOGY :
> High compression ration P2/P0
> Instantaneous response time
> Can be mounted by any positions
> Non repairable
> Limited maintenance
• Compact
PISTON TECHNOLOGY :
> Prevents disassembly while under pressure
> Adaptation to high température
> Adaptable in transfert System
> High compression ratio
> Customized capacity
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Rated to 3000 psi, piston type, designed for long life and easy maintenance.
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Fluids are practically incompressible and cannot therefore store pressure energy. The compressibility of a gas (nitrogen) is utilized in hydropneumatic accumulators for storing fluids. EATON piston accumulators are designed on this principle, using nitrogen as the compressible medium. A piston accumulator consists of a fluid section and a gas section with the piston acting as a gas proof screen. The gas section is precharged with dry nitrogen gas. The fluid section is connected to the hydraulic circuit so that the piston accumulator draws in fluid when the pressure increases thus compressing the gas. When the pressure drops, the compressed gas expands and forces the stored fluid into the circuit.
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The hydraulic accumulators are primarily used to minimize the powers of drive of the pumps, to balance volumes, to smooth the points of pressure and like accumulators of energy and amortisseus of pulsations.
Accumulators with vession from 1 to 50 L
Membrane accumulators from 0,075 to 2,80 L
Block of safety and block of insulation
Devices of filling and control
Fasteners
Safety members
Valve of loading of accumulator
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With more years of experience than any other name, Parker Hannifin's Hydraulic Accumulator Division is an industry leader, worldwide. We supply the broadest accumulator product line, including piston, bladders and diaphragms. If fact, the well known Greer bladder accumulator line is part of today's Parker advantage for you. So, clearly without limitations or bias, we recommend and supply the best engineered solution based upon your application.
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Type ABSBG Accumulator assemblies:
- Accumulator assembly with safety block to DIN 24552
- Bladder or diaphragm type accumulators
- Safety block with integrated shut-off valve, safety valve (type tested) and unloading valve
- Unloading valve either manually or electrically operated
- Glycerine-filled pressure gauge with red marking of the pressure to be relieved
- Bracket for welding into place
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HYDAC bladder accumulators consist of a welded or forged pressure vessel, an accumulator bladder and valves at the gas and the fluid connection.
In addition to the standard construction, special constructions are possible, especially for applications for very high flow rates (e.g. up to 100 l/s) or pressures (e.g. up to 1,000 bar).
The technical specifications are:
- Nominal volume: 0.5 ... 450 l,
- Max. working pressure: up to 1,000 bar,
- Available elastomers as standard: NBR, ECO, IIR, FKM (FPM),
- Accumulator shell materials: carbon steel, stainless steel, aluminium.
The following advantages set HYDAC bladder accumulators apart:
- high flow rates possible,
- no pressure differential between fluid side and gas side,
- compact, low maintenance,
- high cyclic frequencies.
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energy, silence, comfort, service life…
energy storage
A hydro-pneumatic accumulator is a vessel which, in hydraulic circuits, is capable of storing a large amount of energy in a small volume.
a simple principle
If the very low compressibility of fluids makes it difficult to store their energy in small volumes, it does, however, enable them to transfer a significant force. Gas on the other hand is highly compressible, and can therefore store considerable amounts of energy in small volumes.
The hydropneumatic accumulator makes use of these two properties.
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Bladder accumulators can be supplied to suit a wide range of applications including hydrostatic bearings, lubricating oil supplies, chucking systems on machine tools, safety and emergency braking systems and many more.
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Main Characteristics
Assembly position: Vertical with gas connection upward
Ambient temperature: from -15 C to + 70 C
Shell material: alloyed carbon steel
Bladder material: NBR
Painting: anti rust primer
Max operating pressure: 330bar
Pre-charging gas: nitrogen only
Fluid: Hydraulic oil according to DIN 51524
Fluid temperature: T < 80 C
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Features
4000 PSI Working Pressure
Utilizes Standard Components
Piston Design
Four Bore Sizes Available
Patent Pending Swaged End Cap Connections
"Schrader" Style Gas Valve
Heavy Duty Gas Valve Protector
"No Gas Valve" Option
Multiple Hydraulic Port Sizes
Male Threads Available
Spanner Holes
On-Time Delivery
Non-Repairable
Economical
Advantages
Higher working pressure rating meets more applications
Allows for faster delivery of proven designs
Piston design prevents sudden failure of accumulator
Customized to exactly fit the application
Large selection of sizes, capacities
Economical, fatigue tested
Industry standard; will fit existing charging equipment
Protects the gas valve and provides a secondary gas seal
Eliminates use of the gas valve
Prevents users from adjusting pre-charge
Allows for a wide range of hydraulic fittings
Ease of mounting to IHC's
Allows for installation into restrictive spaces
Average five-day delivery on standard designs
Allows for lower initial cost
Cost savings to hydraulic system
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The hydro pneumatic piston accumulator, or piston accumulator, is a sort of tank in a hydraulic circuit,
capable of storing a large quantity of energy with a low volume.
A piston accumulator is divided in two chambers: one for the fluid under pressure, the other one for the
nitrogen (or other type of gas). The two chambers are separated from one another by a piston.
In case of peak of pressure in the hydraulic circuit, the fluid pressure is higher than the initial pressure
(called inflation pressure). When the fluid arrives in the piston accumulator, the nitrogen will compress
and will therefore retain the corresponding fluid.
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We provide a range of diaphragm accumulators commonly used in mobile equipment and other applications where weight and space is a consideration.
There are two options within the diaphragm accumulator range
Standard Diaphragm Accumulators
Additional Range of Diaphragm Accumulators
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