SERTIS

The SERTIS static sieve is remarkable from many points of view:

• it is the only one of our devices which does not have a motor
• it is the most effective to extract the “soft” matters contained in the water. (cheese particles, cow stomach content in slaughterhouses, pig slurry, sewage plant sludge), thanks to its tangential filtration effect
• It is more efficient when it is partially clogged
• It is cheap

Without a scraper automatically cleaning the grid, it will be necessary to check its state of fouling periodically and to carry out possible manual cleaning actions with the high pressure lance.

In the static sieve SERTIS, the inclined filtering grid is made up of wires with a triangular section arranged horizontally. The space between the wires is chosen according to the degree of filtration required and can vary from 0.25 to 2 mm.
The liquid flow arrives through a weir located upstream of the screen: it first takes a certain speed by passing over a solid plate – a sort of “launching ramp” – then arrives on the filtering panel.
Under the effect of the kinetic energy acquired in the first part of the descent, the solid particles tend to go “straight down”, while the water easily “takes a 90° turn” to cross the screen.
This is called the “tangential filtration” effect, as opposed to normal filtration where the flow and the particles it contains are perpendicular to the filtering surface.