Parker OLAER CN Serie Manual Del Usuario página 18

Catalogue HY10-4021-M1/EU
GB
Before carrying out any work on the hydraulic
system, ensure that it is depressurized. Incorrect
installation may result in serious accidents. Explosion
hazard and/or danger of bursting!
It is strictly forbidden to:
• weld, solder, drill, or perform any other operation
that may change any mechanical properties!
• modify the accumulator or its components without
the prior written agreement of Parker .
For further information about the commissioning or use of
the accumulator, contact Parker or an approved Parker agent.
6.1 Commissioning Recommendations
6.1.1 Inflation pressure P0 - Maximum allowable
inflation pressure :
The inflation pressure (P0) is calculated according to the
operating conditions indicated by the customer.
On some models, the maximum allowable inflation
pressure is indicated on the accumulator.
The accumulators are supplied as follows:
• Ready for use, inflated to P0.
• Inflated between 2 and 5 bar (storage pressure): in
this case, the accumulator must be inflated to P0
before it is put into service (see 6.2).
6.1.2 Inflation gas :
Use only pure nitrogen at minimum 99.8% class 2.8
except for piston accumulators for which pure nitrogen
at minimum 99.99% class 4 must be used (to ensure
protection against corrosion).
It is strictly forbidden to use oxygen or air to inflate
the accumulator! RISK OF EXPLOSION!
6.1.3 Maximum allowable pressure PS :
Allowble maximum pressure (PS) is indicated on
the accumulator.
Check that the maximum allowable pressure is greater than
that of the hydraulic system. For any other pressure, you
will have to contact Parker .
6.1.4 Allowable pressure range (type ELV/OLV only) :
The maximum allowable pressure amplitude (ΔPmaxi
= Pmax – Pmin) between the maximum and minimum
hydraulic pressure is indicated on the accumulator (only
applicable for ELV/OLV accumulators).
Check that the pressure amplitude value of the hydraulic
system is below the allowable pressure.
6.1.5 Allowable temperature range Service Temperature :
Allowable temperature range (Service Temperature) is
indicated on the accumulator. Check that the allowable
temperature range covers the operating temperatures
(environment and hydraulic fluid temperatures). For any
other temperature, you will have to contact Parker .
CE User Manual
Accumulators
6.1.6 Hydraulic fluid used :
The accumulator materials are determined according to
the hydraulic fluid used.
Check that the fluid is compatible with the equipment.
It is strictly forbidden to use an accumulator with a
fluid for which it is not designed.
A fluid group 1, in particular, must not be used in an
accumulator designed to use a fluid group 2 .
The authorized fluid group (1 or 2) is indicated on the
manufacturer's nameplate of the accumulator.
For fluid group 1 classification, refer to article 13 in
the PED 2014/68/EU. Fluid group 2 concerns all other
mediums which are not included in fluid group 1.
When a fluid group 1 is used, all possible safety
precautions must be taken in accordance with
current site regulations.
For further information, contact Parker
6.1.7 Installation site :
Ensure that the labels and markings are clearly visible.
Leave at least 200 mm above the inflation valve for the
checking and inflation instruments.
Where the model used is fitted with a bleeder screw,
ensure that this is fully accessible.
Take the environmental conditions into account and, if
necessary, protect the accumulator against heat sources,
electric and magnetic fields, lightning, moisture, bad
weather and so on.
For optimum performance, place the accumulator as
close as possible to the unit being used, and install it
vertically with the inflation valve upwards.
The accumulator can also be mounted horizontally in
certain conditions (except for ELV/OLV types, that strictly
shall be installed vertically with the inflation
valve upwards).
6.1.8 Mounting :
Mount the accumulator as follows:
• Ensure that the pipes connected directly or
indirectly to the accumulator are not subjected to
any abnormal force,
• Ensure that the accumulator cannot move, or
minimize any movement that may occur as a result
of broken connections.
Parker clamps and brackets are designed for this purpose
(and can be supplied as optional extras).
The accumulator must not subjected to any stress or load,
in particular from the structure with which it is associated.
Contact Parker in case of mounting on the
movable structures.
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Parker Hannifin
Accumulator and Cooler Division Europe
Paris, France