SEKUR SFERA Serie Manual De Uso Y Mantenimento página 18

Static seal test in negative pressure
(3) and in positive pressure (4) by
the user
Tightness test with test equipment
Replacement of: inhalation gasket
(5), check valves, head harness,
gaskets
Replacement of inhalation and
exhalation valves (6)
Replacement of the speech module
Check of the thread of the
connector with plug gage
Legenda:
(1) Even in absence of use, unless it has been stored in airtight package.
(2) Only if exposed to heat sources.
(3) The test consists in checking that are not noticed leakages through the mask after donning it, closing the
inhalation inlet with the palm of the hand and building a negative pressure by attempting to inhale.
(4) The test consists in checking that are not noticed leakages from the mask while keeping breath after
donning it complete of the breathing apparatus with the cylinder valve open and the demand in breathing
mode.
(5) Fix the new gasket with a small amount of Loctite 480 and wait few moments until it dries before next
use. Not for SFERA SP/A ESA model.
(6) For positive pressure masks replace the complete positive pressure exhalation valve assembly.
(7) Only in case of heavy duty. The year of manufacture is stamped on the speech module.
7.2. Cleaning
The mask must be cleaned every time it is used. Lack of cleaning, besides hygienic problems, can also
jeopardize the correct functioning of the device. Washing can be performed in a traditional way by dipping in
water, or by ultrasonic washing. In both cases, depending on the need to perform a deep cleaning of the mask
due to its conditions, it can be disassembled and all the components can be cleaned separately. Washing the
speech module and disassembling of the positive pressure assembly is not recommended. Ultrasonic washing
has to be done with SONOREX SUPER RK514BH equipment or RK1028CH which can be supplied by D.P.I. s.r.l..
Using different equipment can damage the correct functioning of the masks. Ultrasonic washing temperature
must be set at a temperature not higher than 40°C using a mild detergent (Degreaser cod. 4437.0370) 5%
dilution in water. Traditional washing can be performed with tepid water and a mild detergent (Degreaser
cod. 4437.0370) 5% dilution in water. In any case, never use solvents! After cleaning it thoroughly, rinse under
running water and hung up to dry in open air, avoid in any case exposure to direct solar radiation, or in special
cupboards. During drying pay attention not to expose the mask to direct contact with hot parts or with hot
air (warmer than 45°C) or to direct solar radiation in order to avoid damages to rubber parts. Check that after
cleaning operations no traces of detergent are left otherwise repeat rinsing and drying. If the mask has been
disassembled for washing, a leak tightness test with test equipment has to be performed. If the mask has
been exposed to chemicals particularly toxic, biological or radioactive agents, maintenance has to be
performed by specialized personnel or by D.P.I. s.r.l. Maintenance and Assistance Service.
7.3. Disinfection
Mask disinfection is necessary when it is worn by different users in order to prevent hygienic or sanitary
problems. Disinfection can be performed in a container after cleaning or can be performed by the equipment
SONOREX SUPER RK514BH or RK1028CH which can be supplied by D.P.I. s.r.l.. Keep in mind that detergent
and disinfecting agent neutralize each other when used at the same time, therefore baths have to be kept
separate washing carefully the container among the two. Disinfection can be performed only with authorized
(disinfectant cod. 4437.0360) 5% diluted in water. At the end rinse in running water and dry with the same
precautions as of paragraph 7.2.
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