SCM SC 10, Руководство пользователя

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7
The SC submerged aerator evidently provides an elevated performance in the transfer of
oxygen and increased mixing ability. In addition, working as it does on the bottom of the
tank, it permits a total airing of the waste water avoiding dead zones which are characteristic
of other systems.
The asynchronous electric motor with squirrel cage rotor is submersible featuring protection
degree IP68.
All versions have nuts and bolts and drive shaft in stainless steel, which guarantee a reliable
operation even when moderately aggressive fluids are aerated.
For the installation of the SC submerged aerator, it is sufficient to put the aerator on the
bottom of the tank (see picture 1 page 23) without the help of any anchorage and support
structures. The weight of the machine itself and its low centre of gravity ensure a high
stability. A chain (see picture 2 page 24) locked to the machine and fixed to the intake pipe,
allows an easy handling of the SC submerged aerator and avoids using any expensive
gangways or emptying of the tank (see picture 5 page 28).
When the product is installed according to the instructions given in this manual and in
compliance with the diagrams, the acoustic pressure level caused by the machine within
the given field of operation will never exceed 70 dB (A). Noise measurement was conducted
in compliance with ISO 3746 and, according to 89/392/EU Regulations. The gauging points
were 1 meter from the reference surface of the machine and 1.6 metres from ground or
access platform level.
The maximum value is evenly distributed around the unit.
ATTENTION
The SC submerged aerators are not suitable for:
- Dry operation;
- Aeration or mixing of liquids at a temperature exceeding 40
°
C (104
°
F);
- An immersion depth inferior or superior to the minimum or maximum
values indicated in the graphs attached to this manual;
- Aeration or mixing of liquids with a pH value of other than 6,5
÷
8,5
(in case of different pH values, special versions are produced on request);
- Aeration or mixing of inflammable liquids;
- Operation in places with a classified risk of explosion.
3.2 MARGINAL NOTES TO TAKE INTO CONSIDERATION