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5.8 MAINTENANCE PROCEDURES
These procedures are the responsibility of maintenance operator or company authorized to conduct any revision.
CAUTION: according to the current regulations in the country where they are used fire extinguishers, some
maintenance procedures may not be applicable.
5.8.1 Details of maintenance procedures adopted in accordance with the regulations in force
n.
Phase or element checked
Istructions
1
Check the seal and the
safety pin
Check if the seal and the safety pin have been removed.
2
Check the pressure gauge
Check the suitability of the pressure gauge. If it does not work freely or if it
indicates a pressure outside tolerances, check the value of the pressure inside
the extinguisher with a control manometer pressure fitted with a grease fitting.
If the pressure is too low, set aside the fire extinguisher and check further in the
workshop to identify the cause.
3
Inspect the exterior of the
extinguisher
Check for signs of corrosion, shock, scratches or deterioration that could
prevent the proper operation of the extinguisher.
4
Check the hose
Check the suitability of the hose and make sure it is level, or obstructed,
fissured, worn or damaged. Blow if necessary with compressed air. Replace if
necessary.
5
Check the way to use the
extinguisher
Verify the accuracy and readability of the mode of use indicated on the label of
the extinguisher.
6
Open a portable fire
extinguisher
Extinguishers permanent pressure must be opened only in case of partial use,
loss of pressure or weight control and possible replacement of the extinguishing
agent.
Open the portable fire extinguisher conforming to the safety precautions
described in paragraph 5.3.2, to remove the valve from the cylinder.
7
To empty a portable fire
extinguisher
Pour the initial charge into a clean container and check whether the charge can
be reused. If there is debris, replace it. Check the filter status of the float. If it is
defective, replace the float.
8
Verify proper operation
and the suitability of all
items
Clean if necessary and pass air through the other parts, paying particular
attention to the valve orifice. Verify that the safety valve (if there is) and other
parts are not blocked. Replace defective parts.
N.B. when the pressure gauge is defective, replace the valve.
Verify that the organ functioning and discharge control operate freely. Clean,
perform the repair or replacement of defective parts if necessary. Protect
moving parts and threads against corrosion with a silicone-based lubricant
grease.
9
Check the seals
Replace the seals. Lubricate the new seals with silicone grease before
installation.
10
Examine the inside of the
cylinder
Check the inside of the cylinder with a light. Verify the absence of corrosion and
/ or deterioration of inner liner.
11
Check the expiration date
of the hydraulic test and
replace the portable fire
extinguisher
Check whether the hydraulic test came to an end. In this case, run the test in
accordance with the procedures of paragraph 5.8.3, before refilling the
extinguisher with the extinguishing agent (water and additives) or previously
checked with the new extinguishing agent. Replace the valve cleaned and
checked with the float and the new seals lubricated on the cylinder, taking care
to position them.Screw the valve with a force torque as indicated in the
following note. Pressurize the extinguisher with nitrogen at 15 bar (± 1 bar at
20° C). Insert the safety pin and lock it with the new security seal. Check the seal
of the valve with a spray leak detection. Screw the hose with the tightening
torque 15-20 Nm.
