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SB330-20A1/669U-330A,HYDAC Bladder Accumulators
Category：
HYDAC
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SB330-20A1/669U-330A,HYDAC Bladder Accumulators
Describe:
SB330-20A1/669U-330A
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Description
http://www.jinstartech.com/
General Attributes:
HYDAC Bladder Accumulators very good price
Bladder Accumulators
Standard
DESCRIPTION
Fluids are practically incompressible and cannot therefore store pressure energy.
The compressibility of a gas is utilised in hydraulic accumulators for storing fluids.
HYDAC bladder accumulators are based on this principle, using nitrogen as the compressible medium.
A bladder accumulator consists of a fluid section and a gas section with the bladder acting as the gas-proof screen.
The fluid around the bladder is connected to the hydraulic circuit so that the bladder accumulator draws in fluid when the pressure increases and the gas is compressed.
When the pressure drops, the compressed gas expands and forces the stored fluid into the circuit.
HYDAC bladder accumulators can be used in a wide variety of applications, some of which are listed below:
z energy storage
z emergency operation
z force equilibrium
z leakage compensation
z volume compensation
z shock absorption
z vehicle suspension
z pulsation damping
Design
z Standard bladder accumulator SB330/400/500/550
The HYDAC standard bladder accumulators consists of the pressure vessel, the flexible bladder with gas valve and the hydraulic connection with check valve. The pressure vessels are seamless and manufactured from high
tensile steel.
z Bladder accumulator SB330N
The flow optimised design of the standard oil valve enables the maximum possible operating fluid flow rate to increase to 25 l/s on this accumulator type.
z High flow bladder accumulator SB330H
HYDAC high flow bladder accumulators, type SB330H, are high performance accumulators with a flow rate of up to 30 l/s. The fluid connection is enlarged to allow higher flow rates.
BLADDER MATERIAL
The bladder material must be selected in accordance with the particular operating fluid or operating temperature, see section 2.1.
If discharge conditions are unfavourable (high p2 /p0 pressure ratio, rapid discharge speed), the gas may cool to below the permitted temperature. This can cause cold cracking in the elastomer. The gas temperature can be calculated using the HYDAC Accumulator Simulation Program ASP.
CORROSION PROTECTION
For operation with chemically aggressive media, the accumulator shell can be supplied with corrosion protection, such as chemical nickel-plating. If this is insufficient, then stainless steel accumulators must be used.
INSTALLATION POSITION
HYDAC bladder accumulators can be installed vertically, horizontally and at a slant. When installing vertically or at a slant, the oil valve must be at the bottom. On certain applications listed below, particular positions are preferable:
z Energy storage: vertical,
z Pulsation damping: any position from horizontal to vertical,
z Maintaining constant pressure: any position from horizontal to vertical,
z Volume compensation: vertical.
If the installation position is horizontal or at a slant, the effective volume and the maximum permitted flow rate of the operating fluid are reduced.
TYPE OF INSTALLATION
By using an appropriate adapter, HYDAC accumulators, up to size 1 l, can be installed directly inline.
For strong vibrations and volumes above 1 litre, we recommend the use of HYDAC accumulator supports or the HYDAC accumulator installation set.
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