Cleaning And Inspection - Freudenberg BA 15-B02 000/18 Instrucciones De Operación

Pull the bladder out of the accumulator. Surface damage
during extraction must be prevented in case of reuse of the
bladder.
7.3. Cleaning and inspektion
After dismantling the bladder accumulator, all components must be cleaned and inspected for indications of
wear and possible damage.
All metal parts should be cleaned carefully with an organic cleaning agent, the bladder and the sealing rings
with isopropyl alcohol or a comparable solvent. Sufficient material compatibility of the components with the
selected solvents must always be checked before use.
Within the scope of visual component inspection, the following steps can be taken and evaluated.
First, inspect fluid port components for signs of excessive wear, motion marks or cracks, and corrosion. Press
the poppet valve into the seat several times, turn it slightly, paying attention to a smooth sliding of the valve
stem and a free movement of the spring. In case of damage to the components or inadequate free movement
of the poppet valve, Freudenberg recommends replacing the fluid port connection.
If reused, the bladder must first be checked for surface damage such as porosity, cracks or abrasions. Then fill
up the bladder with nitrogen to its normal size (pressure < 1 bar), soap it or immerse it in water and check for
gas bubbles on the surface. If surface damages or gas leaks are detected, the bladder must be replaced.
Similar to the bladder, the sealing profile of the anti-extrusion ring must be inspected for surface damage. It
must also be ensured that no micro cracks have formed in the vulcanization area. The centering surfaces of
the split ring must not be deformed or otherwise damaged. In case of one of these deviations, the component
must be replaced.
The pressure vessel must not contain any foreign matter after internal and external cleaning. In particular, the
inner surface of the shell as well as the centering bore of the fluid port connection must be free of grooves,
notches or any other surface damage. If surface corrosion is detected or if indications of a change in the vessel
material properties is presumed, Freudenberg recommends to let the accumulator be checked by a certified
inspector.
Freudenberg recommends that the seal between the fluid port housing and the vessel locating bore, as well as
the gas valve body and its sealing rings, should generally be replaced before reassembly.
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