5
Parker Olaer
Accumulator and Cooler Division
Sandycroft, UK
Product Information
Accumulators
Catalogue HY10-4005-UM/UK
direct sunlight, heat or rotational electrical equipment.
Inspection Before Use:
•
If possible, inflate bladders to not more than 1½ times natural diameter.
•
Visually examine seams for defects, and surface for cracking.
•
Immerse in water to inspect for leakage or perforations.
NOTE: Elastomers not stored properly will be subject to attack from ozone, heat or UV light.
Cracking will develop within one year. Elastomers should be replaced if storage extends
beyond 5 years.
Installation
INSPECTION OF ACCUMULATOR
Parker Olaer accumulators and associated products are thoroughly inspected at the factory prior to
despatch and are ready for installation following precharging.
After unpacking, inspect the accumulator for possible damage caused in transit.
•
Check the following items for tightness;- all nuts, screws, locking rings, bleed screws, adaptors
and fittings, as applicable.
•
Check that the maximum working pressure of the accumulator is equal to or greater than the
maximum pressure of the system. (see INTERPRETATION OF MARKINGS)
•
Ensure that you are using the correct accumulator for the application paying particular attention to
the risk of corrosion from either the system fluid or the environment.
INSTALLATION RECOMMENDATIONS
•
All accumulators are supplied un-precharged unless a precharge pressure is specified when
ordering. Prior to applying hydraulic pressure to the system all accumulators must be precharged
with
NITROGEN GAS ONLY
. (for precharging procedure see COMMISSIONING)
•
It will be necessary to check the gas precharge pressure at regular intervals (see ROUTINE
MAINTENANCE). Consideration should therefore be given to the following:
–
The provision of a safety block fitted between the accumulator and fluid pressure line to enable
isolation of hydraulic system pressure.
–
The location of the gas charging valve with regard to the potential for accidental damage
and safe discharge of high-pressure gas. The provision of a warning label (in addition to that
provided on the accumulator
nameplate) stating “PRECHARGED WITH N2 GAS AT....bar”.
•
It is necessary to ensure that the accumulator is protected from over pressurisation. General
protection is usually provided by the hydraulic system relief valve, which should be set at no higher
