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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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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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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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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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Hydraulic Load Cells, Model 830/833/844
ERICHSEN hydraulic load cells provide a simple and economical method of measuring forces. The technique is based on the hydraulic transmission of forces which act on the piston of the force transducer. This hydraulic pressure is immediately indicated on a display unit with a scale in Newton. Load cells are ideal for maintenance and adjustment work as well as for the use in plants, machines and systems of all kinds. Their compact dimensions make these instruments extremely versatile. By using the appropriate accessories the measured value can also be shown on a remote display. A transmission of the measured data to the PHYSIMETR® 906 MC-B/S/E by means of a pressure transducer is also possible.
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The load cell in ring form is used for the meaurement on shafts and spindles to which a load cell of standard shape cannot be attached.
The distinctive feature of this load cell by comparison with the others is the ring shape of the load cell piston and diaphragm. The force acts on a thrust roller bearing and is transmitted without rotation to the ring shaped piston. In accordance with the surface area of the piston the force acting on it is transferred to the hydraulic fluid and from there via the connecting tube to the measuring instrument.
The straightforward relationship between the pressure, force and piston surface area enables the scale of the measuring instrument to be graduated in a variety of units, e.g. kN, kg, t, m3 or litres. Maximum piston stroke is 0.8mm.
The widely differing conditions governing installation, particularly in the case of the ring shaped load cells, will often require different designs of casing and fastenings. In most cases it would be possible to adapt design to customer´s requirements. The measuring devices employed may be pressure gauges, pressure sensors or other pressure measuring devices fitted with contacts.
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