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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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AIR-OIL HEAT EXCHANGERS -SERIES AP WITH HYDRAULIC MOTOR :
This type of exchanger has been designed for use on movable machines where battery feed is insufficient or when exchangers with direct current supply are inadequate to produce high thermic yields. The radiative unit is of aluminium because this material is a very good conductor; providing high thermic yields and relatively compact over-all dimensions. Thanks to the particular construction of the radiative unit the exchangers of the series APL cope well with water hammer conditions which, at peak values, must not exceed the minimum allowable dynamic pressure of 20 bar. The maximum allowable static pressure is of 35 bar.
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Oil/air heat exchangers
type LKI-HYD
Low noise level
High performance
Low cost
With this new generation of Universal Hydraulik LKI oil-coolers, the manufacturers have succeeded in reducing the noise level. These coolers are ideally suited for mobile installations - for the cooling of hydraulic or lubricating oils.
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Air oil cooler with hydraulic motor and industrial hydraulic systems
An air oil cooler fitted with a hydraulic motor for heavy duty applications with high cooling requirement. The Oiltech LHC air oil coolers are designed for industrial as well as mobile applications. Maximum cooling capacity 130KW at ETD 40°C
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Hydraulic compensator
Generally mounted inside hydraulic tanks and operating with no energy source, these products compensate the variations in volume of oil or any other fluid caused by changes in temperature or volume, whilst avoiding all risk of accident for the equipment.
PRONAL compensators also ensure that tanks are completely leakproof and protect any hydraulic fluids from external pollution by means of a totally flexible membrane which isolates them from the ambient environment. They can also act as hydraulic dampers.
Advantages :
- suitable for all types of hydraulic circuit,
- prevents air emulsifying in the oil,
- leakproof hydraulic circuits,
- pressurisation of the tanks,
- maintenance-free and very long service life
A highly diversified range of products :
- capacities vary between 0.1 and 10,000 litres,
- standard and customized range with a wide choice of solutions offering hydraulic protection.
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TT 07 :
- Pression de service (statique): 26 bar
- Matière de l'élément refroidisseur: Aluminium
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Oil/Air Heat Exchangers
Very low noise level combined with low costs in the model ranges
- LKI
- LKIHYD
- LKM
Up to 26 bar oil pressure, cooling capacity from 1.5 to 150 kW, respectively from 20 to 700l/min, oil flow. Optionally with bypass valve for pressure peaks. Various electric motors available.
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TT 01 :
- Pression de service (statique): 26 bar
- Matière de l'élément refroidisseur: Aluminium
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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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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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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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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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BWT platecooler series
Highly efficient heat transfer
Compact dimensions
Low water consumption
Highly turbulent flow
Very efficient oil / water cooler with small physical dimensions. Easy handling and installation. Due to highly turbulent flow very little tendency of fouling, almost maintenance free.
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Water-oil heat exchangers are shell and tube type. they permit to waste the heat in hydraulic plants. They can operate on exhaust line of the main hydraulic circuit, or on a separate circuit dedicated to cooling
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WATER-OIL HEAT EXCHANGERS WITH TUBE BUNDLE
They consist of small diameter smooth tubes; this allows the best compromise between high thermic yield and low pressure loss. For a good exchanger practices some oil rates are indicated in the tables. Going down to the lowest rate of flow, indicated in the tables, the low oil speed causes a great loss in yield, whereas a rate of flow which is superior to the maximum indicated, causes great pressure loss and does not considerably increase the thermal yield. The yield diagrams indicate the heat quantity each exchanger can disperse according to the difference between oil and water mean temperatures. Such diagrams assume the exchangers to be working with the maximum oil rate indicated in the table. With the minimum rate, the yield decreases by about 10%. Required water volume is a follows:
85 l/h for each kW to disperse with water temperatures (20°C)
170 l/h for each kW to disperse with higher water temperatures
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Basco Type OP Heat Exchangers
First introduced in 1962, the Basco OP design has proven to be the preferred TEMA Type AEW shell & tube heat exchanger in the market. The "OP", or "O-Ring Protected" design features removable tube bundle, nozzle location flexibility, and a unique threaded O-ring retainer that permits removal of the reversing bonnet without disturbing the piping or draining the shellside fluid. Removal of the channel cover permits full inspection and cleaning of the tube side.
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HW Serie:
Water-oil shell and tube heat exchangers, used for the cooling of industrial systems and in the marine sector. Fully extractable shell and tube for better maintenance of the heat exchanger. Aluminium body, designed to allow maintenance without the need to disassemble the heat exchanger. Cast iron heads in the industrial version, bronze in the marine version. Fluid circulation exclusively in countercurrent.
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Accumulators, Hydraulic exchangers
