EPE AMW-0.32 Manuel de démarrage rapide - Page 7

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Diaphragm materials | Checking & Charging
The choice of the elastomer used for the seals depends on the liquid to be used and on the operating temperatures
(and at times, storage). In the chart below, each polymer has a designated letter to be used in the ordering code.
Code
Polymer
letter
P
Y
V
Checking & Charging
For Accumulators with M design Gas Valve use Pre-Loading & Checking Set type-PCM. For Accumulators with V design Gas
Valve PC type with appropriate adaptor is to be used. Accumulators with P design Gas Valve - Non-rechargeable type.
When charging, the nitrogen bottles must be capable of delivering pressure higher than the desired accumulator gas
pressure. Use dry industrial nitrogen. NEVER USE OXYGEN OR AIR.
Proceed as follows:
* Fit the suitable pre-charging equipment to the gas valve;
* Connect it to the nitrogen cylinder with the charging hose;
* Slowly introduce nitrogen into the accumulator until reaching a pressure slightly above the required level;
* Close the valve of nitrogen cylinder and disconnect the charging hose from the equipment;
* Wait for the gas temperature stabilization;
* Set the pressure by venting off the excess of gas.
* Tighten the Charging Valve to 20 Nm using torque wrench.
Pre-Loading & Checking Set
SW 14
Bleed
Ring nut
Hexagon 6
Type PCM
A PRESSURE REDUCING VALVE MUST BE INSTALLED BETWEEN THE NITROGEN GAS CYLINDER AND
THE ACCUMULATOR WHEN THE GAS CYLINDER PRESSURE IS HIGHER THAN MAX PERMISSIBLE
PRESSURE OF ACCUMULATOR.
Temperature
ISO
range (°C)
Mineral, vegetable, silicon and lubricating oils, industrial water,
glycols,
NBR
-20
to
+80
hydrocarbons, butane, diesel oil, kerosene, fuel oils etc.
Mineral oils and greases, aliphatic hydrocarbons (propane,
butane and gasoline), silicone oils and greases, water at room
ECO
-30
to
+110
temperature, resistance to ozone, aging and weathering..
Mineral oils, greases, non-flammable fluids of
oils, animal and vegetable oils, aliphatic hydrocarbons (gasoline,
butane, propane, natural gas), aromatics hydrocarbons (benzene,
FKM
-10
to
+1 0
5
toluene), chlorinated hydrocarbons (Tetrachloroethylene, carbon
tetrachloride), fuels (regular, super and containing methanol),
excellent resistance to ozone, weathering and ageing.
+5
Non-return valve connection
for charging hose
OR 16x3
M28x1.5
Some of the liquids compatible with the polymer
non-flammable
liquids
7
(HFA-HFB-HFC),
aliphatic
HFD
group, silicone
Type PC