Safety Information - Hydac FPU Serie Instrucciones De Servicio

5.

Safety information

NOTICE
The intended use of the FPU exclusively
includes the testing and correcting of the
accumulator pre‑charge pressure (p
The FPU is not suited for continuous use.
DANGER
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.
When nitrogen is released from hydraulic
accumulators in enclosed spaces, adequate
ventilation must be provided.
Risk of suffocation.
NOTE
When using a nitrogen bottle (200/300 bar),
a pressure reducing valve must be used (see
diagram in section 2.1 with FPU‑1).
When using a pressure boosting system
(design can vary, observe manufacturer's
instructions), it must be ensured that the max.
permissible operating pressure of both the
accumulator and the FPU is not exceeded
(see diagram in section 2.2 with FPU‑2).
DANGER
Risk to health when using aggressive
media (we recommend using special
charging and testing units).
When charging or testing the hydraulic
accumulator, nitrogen and operating fluid can
escape if the bladder, diaphragm, piston seal
or metal bellows are faulty (i.e. leaking).
NOTICE
When charging using an intensifier or
nitrogen charging system connected
upstream, continuous operation can lead to
unacceptable increases in temperature. Rest
).
periods must therefore be incorporated into
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the charging procedure and the FPU allowed
to cool down.
Warning
FPU‑1:
Removal of the check valve (C) is not
permitted. The valve has a safety function for
the entire FPU‑1.
NOTICE
For drawings referred to in the text, see fold‑
out page.
6. Working with the FPU-1
NOTICE
Safety precautions according to section 4.2
must be observed.
The following works refer to the testing and
setting of the accumulator pre‑charge pressure
(p ) with the FPU‑1.
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