Dpi Sekur SFERA Manual De Uso Y Mantenimento página 21

(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.
8 Tightness test with test equipment
In the event the mask has been disassembled in order to be cleaned or to have some
component parts replaced, a tightness test must be carried out. Before carrying out the
tightness test, make a visual check. Check valves, housing and rubber gasket in particular, in
order to make sure they are clean. Defective parts must be replaced. Mask which failed the
tightness test cannot be used.
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