HYDAC International FPU Notice D'utilisation page 18

Description
Hydraulic accumulator (high
pressure)
3. Safety information
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3.1 Basic guidelines
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Intended use
● The intended use of the FPU exclusively
includes the testing and correcting of the
pre-charge pressure of a hydraulic accu-
mulator.
● The FPU is not suited for continuous use.
● The FPU can be used both with conven-
tional nitrogen bottles (200/300 bar) and
with a pressure boost system (design can
EN
vary, observe manufacturer's instructions).
When using the FPU with a nitrogen bottle
(200/300 bar), a pressure reducing valve
must be used – see Set-up diagram FPU‑1
[Sec. 2]
When using the FPU with a pressure
boost system (design can vary, observe
manufacturer's instructions), it must be
ensured that the max. permissible oper-
ating pressure of the FPU hydraulic accu-
mulator is not exceeded – see Set-up
diagram FPU-2 [Sec. 2]
Obligations of the owner
● The owner is responsible for the FPU
being used as intended.
Qualifications of personnel
● All work with the FPU must only be carried
out by suitably trained staff.
● Incorrect installation or handling can lead
to serious accidents. The relevant
protective measures must be taken (e.g.
for aggressive operating media).
Further legal information
See: www.hydac.com
3.2 Safety hazards
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DANGER
Risk of bursting
On no account must any welding, soldering
or mechanical work be carried out on the
FPU. These types of unauthorised work lead
to a loss of operating permission.
No.
DANGER
5
Risk of explosion
Only nitrogen may be used as a charging
gas. NO other gases are permitted.
DANGER
Risk of burns
When charging using an intensifier or
nitrogen charging system connected
upstream, continuous operation can lead to
unacceptable increases in temperature.
Incorporate rest periods into the charging
procedure and allow the FPU to cool down.
DANGER
Risk of suffocation
When nitrogen is discharged from hydraulic
accumulators, it is discharged to the ambient
air. Large quantities of nitrogen in enclosed
areas cause a lack of oxygen: Vent rooms.
DANGER
Health hazard
When charging or testing the hydraulic accu-
mulator, nitrogen and operating fluid can
escape if the bladder, diaphragm, piston seal
or metal bellows are faulty (i.e. leaking).
Appropriate safety precautions must be
taken.
4. Transport and storage
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Transport
The FPU can be transported without special
precautions. Damage is to be avoided.
Storage
The FPU can be stored in any position (orien-
tation). The FPU must be kept in a cool, dry
place, protected from direct sunlight. This can
be in its packaging or in a protective case (if
included with delivery).
5. Basic guidelines
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Prior to each testing procedure, and before
topping up or re-charging with nitrogen, the
hydraulic accumulator must be isolated from
the pressurised system by means of a shut-
off valve and the fluid released.
18 / 88
INT 3.501.BA15/03.24