manufacture screens with mesh of between 1 and 60mm and with
wire of between 0.7 and 7 mm.
This screen, copied by many others but never rivalled, eliminates
plugging (elements wedge in the mesh) and clogging (very
fine particules adhering to a screening surface). All the
wires are independent of each other and lonely vibrate.
This prevents very fine products from clustering or clogging
together and thus blocking the mesh. Moreover, in case of
high levels of abrasion caused by fine products under water
screening, the ONDAP GOMME screen has a higher lifetime
than a classical woven mesh. A precise and stable square
mesh of evenly spaced wires is ensured by the presence of
steel wefts in all the rubber bands on the anti-clogging
screen. The use of rubber rather than polyurethane wefts
enhances the flexibility of the screens and thus increases
the efficiency of vibration.
Alternating crimped and straight wires facilitates de-clogging
and de-plugging whilst maintaining high rigidity and wear-resistance
levels. Should temperature levels of above 90°C be required
- which is, notably, the case with cements process - MIXTE
ACIER steel screens are recommended. The rubber bands are
replaced by steel wefts and by special sheet metal providing
satisfactory mechanical strenght to wear.
In relation with the form of the mesh and the possibility
that long elements may pass through it, the conditions under
which the ZIGZAG GOMME screen is used must be determined
with care. All this, to define the form of the crimp the
best suited to the screening problems involved.