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Hydraulic Piston
Accumulators
High Pressure
1.
DESCRIPTION
1.1. FUNCTION
E 3.302.0/02.05
Fluids are practically
incompressible and cannot
therefore store pressure energy.
The compressibility of a gas is
utilised in hydro-pneumatic
accumulators for storing fluids.
HYDAC piston accumulators are
based on this principle, using
nitrogen as the compressible
medium.
The piston accumulator consists of
a fluid section and a gas section
with the piston acting as a gasproof screen. The gas section is
pre-charged with nitrogen.
The fluid section is connected to the
hydraulic circuit so that the piston
accumulator draws in fluid when
pressure increases and the gas is
compressed. When the pressure
drops, the compressed gas
expands and forces the stored fluid
back into the circuit.
HYDAC piston accumulators
can be used in a wide variety of
applications and are also available
in different pressure grades
(see following brochures:
Hydraulic Piston Accumulators
no. E 3.301../.. and Accumulators
no. DEF 3.000../..).
The available brochure shows the
high pressure versions of the piston
accumulator (690/800/1000 bar)
with its main dimensions, materials
as well as gas and fluid
connections.
