1. DESCRIPTION
1.1. FUNCTION
The HYDAC charging and testing unit
FPU-1 is used to charge accumulators with
nitrogen or to check or to change the
existing pre-charge pressure in
accumulators.
For this purpose the charging and testing
unit is screwed onto the gas valve of the
hydraulic accumulator and connected via a
hose to a commercial nitrogen bottle.
If the nitrogen pressure is only to be
checked or reduced, the charging hose
does not need to be connected. The unit
has a screw-type tting with a built-in
gauge, check valve and a spindle for
opening the accumulator gas valve to
control the pressure.
HYDAC piston and diaphragm
accumulators can be charged and checked
without the need for adapters. Bladder
accumulators, however, require an A3
adapter.
Please read the Operating Manual!
No. 3.501.CE
Universal Charging
and Testing Unit FPU-1
for Bladder, Piston and Diaphragm
Accumulators
1.3. SPECIAL MODELS1.2. DESIGN
The HYDAC charging and testing unit
for bladder, piston and diaphragm
accumulators consists of:
z Valve body
z Spindle
z Check valve
z Release valve
z Pressure gauge
z Charging hose
z A3 adapter for bladder accumulators
Release valve
Spindle
Check valve
Pressure gauge
For higher pressures, the following special
models are available:
z FPS 600
for bladder accumulators up to 600 bar
max. pre-charge pressure (see technical
information 293715).
z FPK 600
for piston, diaphragm and
SB800-1.5 accumulators up to 600 bar
max. pre-charge pressure (see
technical information 297248).
z FPH 800
for high pressure bladder accumulators
up to 800 bar max. pre-charge pressure
(see technical information 242948).
The photo top left shows a possible order
option, including accessories.
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