Furthermore, we can offer machines with their own shaft and
bearings and coupled to the electric motors via flexible shaft
couplings or belt drives. In these cases, the safety drive guards
are made from spark-free material.
If the area surrounding the equipment is classified as Zone 2,
where, for the Group II, Category 3 equipments are accepted,
the machine could be equipped with the type of protection n
non-sparking motor, with specific marking Ex II 3 G, additional
marking Ex-nA II T3.
In some particular cases, all the internal aluminium parts
wetted by gas can be treated with anodic oxidation; the machine
can be supplied with its own shaft and external bearing housings,
so that the bearings are completely isolated from the gas
handled; and it is also possible to fit lip seals in pairs, with a
barrier fluid in between.
Advantages
The main advantages of using side channel machines are:
easy installation;
low noise level;
no vibration;
pulsation free gas flow;
minimal maintenance.
Moreover no internal lubrication is necessary, and therefore the
gas moving through the machine remains uncontaminated and
completely oil-free.