Principle Of The Injector - Gema OptiFlow IG07-P Operating Instructions Manual

Principle of the injector

OptiFlow IG07-P
Rev. 00 02/19
When air flows through a nozzle into a cavity, a vacuum will be created in
the cavity (see figure below). This effect is used now for aspirating
powder through a suction opening - a powder-air mixture will be created.
fig. 3
1 Conveying air
2 Supplementary air
3 Insert sleeve
4 Powder/air mixture
5 Vacuum
This passes through the nozzle into the insert sleeve and through the
powder hose into the gun.
The powder output volume depends on the ratio between the conveying
and additional air:
–
The conveying air creates the intake depression.
–
The additional air influences the flow velocity.
–
The total air is the sum of the conveying and additional air.
The transport of fine solids such as powder requires a certain air volume
per time unit to facilitate airborne conveyance. If a hose diameter of
11 mm is used, the value is approx. 4 Nm³/h.
If the powder transport becomes irregular, the so-called "pumping" takes
place.
6 Suction tube
7 fluidized powder
8 Powder container
9 Nozzle
Product description  11